Affiliate link disclosure – The BMW Repair Guide uses affiliate links in their site. For more information on affiliate links, please click here.
Repair Summary
This article gives detailed instructions on replacing the fuel injectors in a BMW N55 twin turbo engine. Even though we used a 2011 335i to perform this repair, this article can be applied to any BMW vehicle with the N55 twin turbo including the 1,3,5,7,X3,X6 and Z4 models minor modifications to the repair steps.
See all vehicles this article applies to
E81 1 Series 130i
E81 1 Series 120i
E81 1 Series 120d
E81 1 Series 123d
E81 1 Series 118i
E81 1 Series 118d
E81 1 Series 116i 2.0
E81 1 Series 116i 1.6
E81 1 Series 116d
E87 1 Series 120i
E87 1 Series 130i
E87 1 Series 120d
E87 1 Series 118i
E87 1 Series 118d
E87 1 Series 116i
E88 1 Series 128i
E88 1 Series 135i
E88 1 Series 125i
E88 1 Series 123d
E88 1 Series 120i
E88 1 Series 120d
E88 1 Series 118i
E88 1 Series 118d
E82 1 Series 120d
E82 1 Series M Coupé
E82 1 Series 135i
E82 1 Series 128i
E82 1 Series 125i
E82 1 Series 123d
E82 1 Series 120i
E82 1 Series 118d
F20 1 Series M135iX
F20 1 Series 116i
F20 1 Series M135i
F20 1 Series 125i
F20 1 Series 120dX
F20 1 Series 125d
F20 1 Series 120d
F20 1 Series 118i
F20 1 Series 118dX
F20 1 Series 118d
F20 1 Series 116d ed
F20 1 Series 116d
F20 1 Series 114d
F20 1 Series 114i
F20N 1 Series M140iX
F20N 1 Series 118i
F20N 1 Series M140i
F20N 1 Series M135iX
F20N 1 Series M135i
F20N 1 Series 125d
F20N 1 Series 125i
F20N 1 Series 120dX
F20N 1 Series 120i
F20N 1 Series 120d
F20N 1 Series 118dX
F20N 1 Series 118d
F20N 1 Series 116d ed
F20N 1 Series 116i
F20N 1 Series 116d
F20N 1 Series 114d
F21 1 Series 125d
F21 1 Series M135iX
F21 1 Series M135i
F21 1 Series 120dX
F21 1 Series 118i
F21 1 Series 120d
F21 1 Series 118dX
F21 1 Series 116i
F21 1 Series 116d ed
F21 1 Series 118d
F21 1 Series 116d
F21 1 Series 114i
F21 1 Series 114d
F21 1 Series 125i
F21N 1 Series M140iX
F21N 1 Series 116d ed
F21N 1 Series M140i
F21N 1 Series M135iX
F21N 1 Series 125d
F21N 1 Series 125i
F21N 1 Series M135i
F21N 1 Series 120i
F21N 1 Series 120dX
F21N 1 Series 118i
F21N 1 Series 120d
F21N 1 Series 118dX
F21N 1 Series 118d
F21N 1 Series 116i
F21N 1 Series 116d
F21N 1 Series 114d
F40 1 Series 120dX
F40 1 Series M135iX
F40 1 Series 118i
F40 1 Series 118d
F40 1 Series 116d
F52 1 Series 120i
F52 1 Series 125i
F52 1 Series 118i
E87N 1 Series 130i
E87N 1 Series 116i 1.6
E87N 1 Series 116d
E87N 1 Series 123d
E87N 1 Series 120i
E87N 1 Series 120d
E87N 1 Series 118i
E87N 1 Series 118d
E87N 1 Series 116i 2.0
F22 2 Series M240iX
F22 2 Series 228iX
F22 2 Series M240i
F22 2 Series M235iX
F22 2 Series M235i
F22 2 Series 230iX
F22 2 Series 230i
F22 2 Series 225d
F22 2 Series 228i
F22 2 Series 220i
F22 2 Series 220dX
F22 2 Series 220d
F22 2 Series 218i
F22 2 Series 218d
F22N 2 Series M240iX
F22N 2 Series 218d
F22N 2 Series M240i
F22N 2 Series 230iX
F22N 2 Series 225d
F22N 2 Series 230i
F22N 2 Series 220i
F22N 2 Series 220dX
F22N 2 Series 218i
F22N 2 Series 220d
F87 2 Series M2
F87N 2 Series M2 Competition
F87N 2 Series M2
F23 2 Series M240iX
F23 2 Series 230i
F23 2 Series M240i
F23 2 Series M235iX
F23 2 Series 230iX
F23 2 Series M235i
F23 2 Series 228iX
F23 2 Series 228i
F23 2 Series 220i
F23 2 Series 225d
F23 2 Series 218d
F23 2 Series 218i
F23 2 Series 220d
F23N 2 Series M240iX
F23N 2 Series M240i
F23N 2 Series 230i
F23N 2 Series 230iX
F23N 2 Series 225d
F23N 2 Series 220i
F23N 2 Series 218i
F23N 2 Series 220d
F23N 2 Series 218d
F45 2 Series 225xe
F45 2 Series 218dX
F45 2 Series 225i
F45 2 Series 225iX
F45 2 Series 220dX
F45 2 Series 220i
F45 2 Series 220d
F45 2 Series 218i
F45 2 Series 218d
F45 2 Series 216i
F45 2 Series 216d
F45 2 Series 214d
F45N 2 Series 225xe
F45N 2 Series 225i
F45N 2 Series 225iX
F45N 2 Series 220i
F45N 2 Series 220dX
F45N 2 Series 220d
F45N 2 Series 218i
F45N 2 Series 218dX
F45N 2 Series 218d
F45N 2 Series 216d
F45N 2 Series 216i
F46 2 Series 220i
F46 2 Series 220d
F46 2 Series 220dX
F46 2 Series 218i
F46 2 Series 218dX
F46 2 Series 216i
F46 2 Series 218d
F46 2 Series 216d
F46 2 Series 214d
F46N 2 Series 220i
F46N 2 Series 220dX
F46N 2 Series 220d
F46N 2 Series 218i
F46N 2 Series 218dX
F46N 2 Series 218d
F46N 2 Series 216i
F46N 2 Series 216d
E46 3 Series 325ti
E46 3 Series 318td
E46 3 Series 320td
E46 3 Series 318ti
E46 3 Series 330xi
E46 3 Series 330i
E46 3 Series 330xd
E46 3 Series 330d
E46 3 Series 316ti
E46 3 Series 328i
E46 3 Series 325xi
E46 3 Series 325i
E46 3 Series 320i
E46 3 Series 323i
E46 3 Series 320d
E46 3 Series 318i
E46 3 Series 318d
E46 3 Series 316i
E46 3 Series M3 CSL
E46 3 Series M3
E46 3 Series 330Ci
E46 3 Series 330Cd
E46 3 Series 325Ci
E46 3 Series 323Ci
E46 3 Series 320Ci
E46 3 Series 320Cd
E46 3 Series 318Ci
E46 3 Series 328Ci
E46 3 Series 316Ci
E46 3 Series 323i 2.4
E46 3 Series 316i 1.9
E46 3 Series 316i 1.6
E90 3 Series M3
E90 3 Series 318d
E90 3 Series 335i
E90 3 Series 335xi
E90 3 Series 335d
E90 3 Series 330xd
E90 3 Series 330xi
E90 3 Series 330i
E90 3 Series 330d
E90 3 Series 328xi
E90 3 Series 328i
E90 3 Series 325xi
E90 3 Series 325i
E90 3 Series 323i
E90 3 Series 325d
E90 3 Series 320i
E90 3 Series 320si
E90 3 Series 320d
E90 3 Series 318i
E90 3 Series 316i
E90N 3 Series M3 CRT
E90N 3 Series 318i
E90N 3 Series M3
E90N 3 Series 335xi
E90N 3 Series 335i
E90N 3 Series 335d
E90N 3 Series 330xd
E90N 3 Series 330xi
E90N 3 Series 330i
E90N 3 Series 328xi
E90N 3 Series 330d
E90N 3 Series 328i
E90N 3 Series 325d
E90N 3 Series 325i
E90N 3 Series 325xi
E90N 3 Series 323i
E90N 3 Series 320xd
E90N 3 Series 320i
E90N 3 Series 320d ed
E90N 3 Series 320d
E90N 3 Series 318d
E90N 3 Series 316i
E90N 3 Series 316d
F44 2 Series M235iX
F44 2 Series 218i
F44 2 Series 228iX
F44 2 Series 220d
E36 3 Series 316i
E36 3 Series 318is
E36 3 Series M3
E36 3 Series 320i
E36 3 Series 325i
E36 3 Series 325is
E36 3 Series 323i
E36 3 Series 328i
E36 3 Series 318i
E36 3 Series 323i 2.4
E36 3 Series 325td
E36 3 Series 325tds
E36 3 Series 318tds
E36 3 Series 316i 1.6
E36 3 Series 323ti
E36 3 Series 318ti
E36 3 Series 316g
E36 3 Series 316i 1.9
E91 3 Series 335xi
E91 3 Series 325d
E91 3 Series 335i
E91 3 Series 335d
E91 3 Series 330xi
E91 3 Series 330xd
E91 3 Series 330d
E91 3 Series 330i
E91 3 Series 328xi
E91 3 Series 325i
E91 3 Series 328i
E91 3 Series 325xi
E91 3 Series 323i
E91 3 Series 320i
E91 3 Series 320d
E91 3 Series 318i
E91 3 Series 318d
E91N 3 Series 316d
E91N 3 Series 335xi
E91N 3 Series 335i
E91N 3 Series 330xi
E91N 3 Series 335d
E91N 3 Series 330xd
E91N 3 Series 330i
E91N 3 Series 330d
E91N 3 Series 328xi
E91N 3 Series 328i
E91N 3 Series 325xi
E91N 3 Series 325i
E91N 3 Series 325d
E91N 3 Series 320xd
E91N 3 Series 323i
E91N 3 Series 320i
E91N 3 Series 320d ed
E91N 3 Series 320d
E91N 3 Series 318i
E91N 3 Series 318d
E91N 3 Series 316i
E92 3 Series M3
E92 3 Series 325d
E92 3 Series 335xi
E92 3 Series 335i
E92 3 Series 335d
E92 3 Series 330xi
E92 3 Series 330xd
E92 3 Series 330i
E92 3 Series 330d
E92 3 Series 328xi
E92 3 Series 328i
E92 3 Series 325xi
E92 3 Series 325i
E92 3 Series 323i
E92 3 Series 320xd
E92 3 Series 320i
E92 3 Series 320d
E92 3 Series 316i
E92N 3 Series M3
E92N 3 Series 323i
E92N 3 Series 335xi
E92N 3 Series 335is
E92N 3 Series 335i
E92N 3 Series 335d
E92N 3 Series 330xi
E92N 3 Series 330xd
E92N 3 Series 330i
E92N 3 Series 330d
E92N 3 Series 328xi
E92N 3 Series 328i
E92N 3 Series 325xi
E92N 3 Series 325i
E92N 3 Series 320xd
E92N 3 Series 325d
E92N 3 Series 320d
E92N 3 Series 320i
E92N 3 Series 318i
E92N 3 Series 316i
E93 3 Series M3
E93 3 Series 320d
E93 3 Series 335i
E93 3 Series 330i
E93 3 Series 330d
E93 3 Series 328i
E93 3 Series 325i
E93 3 Series 323i
E93 3 Series 325d
E93 3 Series 320i
E93N 3 Series M3
E93N 3 Series 323i
E93N 3 Series 335is
E93N 3 Series 330i
E93N 3 Series 335i
E93N 3 Series 330d
E93N 3 Series 328i
E93N 3 Series 325i
E93N 3 Series 325d
E93N 3 Series 320i
E93N 3 Series 320d
E93N 3 Series 318i
F30 3 Series 318d
F30 3 Series Hybrid 3
F30 3 Series 335iX
F30 3 Series 335i
F30 3 Series 335dX
F30 3 Series 330d
F30 3 Series 330dX
F30 3 Series 328i
F30 3 Series 328dX
F30 3 Series 328d
F30 3 Series 328iX
F30 3 Series 320iX
F30 3 Series 325d
F30 3 Series 320i
F30 3 Series 320i ed
F30 3 Series 320dX
F30 3 Series 320d ed
F30 3 Series 320d
F30 3 Series 318dX
F30 3 Series 316i
F30 3 Series 316d
F30N 3 Series 340iX
F30N 3 Series 318i
F30N 3 Series 335dX
F30N 3 Series 340i
F30N 3 Series 330iX
F30N 3 Series 330i
F30N 3 Series 330dX
F30N 3 Series 330e
F30N 3 Series 330d
F30N 3 Series 328iX
F30N 3 Series 328i
F30N 3 Series 328dX
F30N 3 Series 328d
F30N 3 Series 320iX
F30N 3 Series 325d
F30N 3 Series 320i
F30N 3 Series 320i ed
F30N 3 Series 320dX
F30N 3 Series 320d ed
F30N 3 Series 320d
F30N 3 Series 318dX
F30N 3 Series 318d
F30N 3 Series 316i
F30N 3 Series 316d
F80 3 Series M3
F80N 3 Series M3
G20 3 Series M340iX
G20 3 Series M340i
G20 3 Series 330iX
G20 3 Series 330i
G20 3 Series 330e
G20 3 Series 330dX
G20 3 Series 320iX
G20 3 Series 330d
G20 3 Series 325i
G20 3 Series 320i 1.6
G20 3 Series 320i
G20 3 Series 320dX
G20 3 Series 318d
G20 3 Series 320d
F31 3 Series 335iX
F31 3 Series 320d
F31 3 Series 335i
F31 3 Series 330d
F31 3 Series 328iX
F31 3 Series 335dX
F31 3 Series 330dX
F31 3 Series 328dX
F31 3 Series 328i
F31 3 Series 325d
F31 3 Series 320i
F31 3 Series 320iX
F31 3 Series 320dX
F31 3 Series 320d ed
F31 3 Series 318dX
F31 3 Series 318d
F31 3 Series 316d
F31 3 Series 316i
F31N 3 Series 340iX
F31N 3 Series 318i
F31N 3 Series 340i
F31N 3 Series 335dX
F31N 3 Series 330i
F31N 3 Series 330iX
F31N 3 Series 330dX
F31N 3 Series 330d
F31N 3 Series 328dX
F31N 3 Series 328iX
F31N 3 Series 325d
F31N 3 Series 320iX
F31N 3 Series 320i
F31N 3 Series 320dX
F31N 3 Series 320d ed
F31N 3 Series 318dX
F31N 3 Series 320d
F31N 3 Series 318d
F31N 3 Series 316d
G21 3 Series 330d
G21 3 Series M340iX
G21 3 Series 330iX
G21 3 Series 330i
G21 3 Series 330dX
G21 3 Series 320i
G21 3 Series 320dX
G21 3 Series 320d
G21 3 Series 318d
F34 3 Series 335iX
F34 3 Series 320i
F34 3 Series 335i
F34 3 Series 335dX
F34 3 Series 330d
F34 3 Series 330dX
F34 3 Series 328iX
F34 3 Series 328i
F34 3 Series 325d
F34 3 Series 320iX
F34 3 Series 320dX
F34 3 Series 318d
F34 3 Series 320d
F34N 3 Series 318d
F34N 3 Series 340iX
F34N 3 Series 340i
F34N 3 Series 335dX
F34N 3 Series 330iX
F34N 3 Series 330dX
F34N 3 Series 330i
F34N 3 Series 330d
F34N 3 Series 320iX
F34N 3 Series 320i
F34N 3 Series 325d
F34N 3 Series 320dX
F34N 3 Series 320d
F35 3 Series 335Li
F35 3 Series 328LiX
F35 3 Series 328Li
F35 3 Series 320Li
F35 3 Series 316Li
F35N 3 Series 335Li
F35N 3 Series 316Li
F35N 3 Series 330LiX
F35N 3 Series 330Li
F35N 3 Series 328Li
F35N 3 Series 328LiX
F35N 3 Series 320LiX
F35N 3 Series 320Li
F35N 3 Series 318Li
G28 3 Series 330LiX
G28 3 Series 325LiX
G28 3 Series 325Li
G28 3 Series 320Li
F32 4 Series 420iX
F32 4 Series 440iX
F32 4 Series 440i
F32 4 Series 435iX
F32 4 Series 435dX
F32 4 Series 435i
F32 4 Series 430iX
F32 4 Series 430i
F32 4 Series 430dX
F32 4 Series 430d
F32 4 Series 428iX
F32 4 Series 428i
F32 4 Series 425d
F32 4 Series 420i
F32 4 Series 420dX
F32 4 Series 420d
F32 4 Series 418i
F32 4 Series 418d
F32N 4 Series 440iX
F32N 4 Series 418d
F32N 4 Series 435dX
F32N 4 Series 440i
F32N 4 Series 430iX
F32N 4 Series 430dX
F32N 4 Series 430i
F32N 4 Series 430d
F32N 4 Series 425d
F32N 4 Series 420iX
F32N 4 Series 420d
F32N 4 Series 420dX
F32N 4 Series 420i
F32N 4 Series 418i
F82 4 Series M4 GTS
F82 4 Series M4
F82N 4 Series M4
F82N 4 Series M4 CS
F33 4 Series 428iX
F33 4 Series 440iX
F33 4 Series 435i
F33 4 Series 435iX
F33 4 Series 440i
F33 4 Series 435dX
F33 4 Series 430iX
F33 4 Series 430i
F33 4 Series 428i
F33 4 Series 430d
F33 4 Series 425d
F33 4 Series 420i
F33 4 Series 420d
F33N 4 Series 440iX
F33N 4 Series 435dX
F33N 4 Series 440i
F33N 4 Series 430i
F33N 4 Series 430d
F33N 4 Series 430iX
F33N 4 Series 420i
F33N 4 Series 425d
F33N 4 Series 420d
F83 4 Series M4
F83N 4 Series M4
F36 4 Series 440i
F36 4 Series 440iX
F36 4 Series 435i
F36 4 Series 435iX
F36 4 Series 435dX
F36 4 Series 430iX
F36 4 Series 430i
F36 4 Series 430dX
F36 4 Series 430d
F36 4 Series 428iX
F36 4 Series 428i
F36N 4 Series 418i
F36N 4 Series 440iX
F36N 4 Series 435dX
F36N 4 Series 440i
F36N 4 Series 430iX
F36N 4 Series 430dX
F36N 4 Series 430i
F36N 4 Series 430d
F36N 4 Series 420iX
F36N 4 Series 425d
F36N 4 Series 420i
F36N 4 Series 420d
F36N 4 Series 420dX
F36N 4 Series 418d
E39 5 Series 540i
E39 5 Series M5
E39 5 Series 540iP
E39 5 Series 535i
E39 5 Series 530i
E39 5 Series 530d
E39 5 Series 528i
E39 5 Series 525tds
E39 5 Series 525td
E39 5 Series 525i
E39 5 Series 525d
E39 5 Series 523i 2.4
E39 5 Series 523i
E39 5 Series 520d
E39 5 Series 520i
E60 5 Series M5
E60 5 Series 523Li
E60 5 Series 550i
E60 5 Series 545i
E60 5 Series 540i
E60 5 Series 535d
E60 5 Series 530xi
E60 5 Series 530xd
E60 5 Series 530Li
E60 5 Series 530i
E60 5 Series 530d
E60 5 Series 525i
E60 5 Series 525xi
E60 5 Series 525Li
E60 5 Series 525d
E60 5 Series 523i
E60 5 Series 520i
E60 5 Series 520d
E60N 5 Series 550i
E60N 5 Series 525xi
E60N 5 Series 540i
E60N 5 Series 535xi
E60N 5 Series 535i
E60N 5 Series 535d
E60N 5 Series 530xi
E60N 5 Series 530xd
E60N 5 Series 530Li
E60N 5 Series 530i
E60N 5 Series 528xi
E60N 5 Series 530d
E60N 5 Series 528i
E60N 5 Series 525Li
E60N 5 Series 525xd
E60N 5 Series 525i
E60N 5 Series 525d
E60N 5 Series 523Li
E60N 5 Series 523i
E60N 5 Series 520Li
E60N 5 Series 520d
E60N 5 Series 520i
E61 5 Series 550i
E61 5 Series 530d
E61 5 Series 545i
E61 5 Series 535d
E61 5 Series 530xi
E61 5 Series 530xd
E61 5 Series 525i
E61 5 Series 530i
E61 5 Series 525xi
E61 5 Series 525d
E61 5 Series 523i
E61 5 Series 520d
E61N 5 Series 523i
E61N 5 Series M5
E61N 5 Series 550i
E61N 5 Series 535xi
E61N 5 Series 535d
E61N 5 Series 530xi
E61N 5 Series 530i
E61N 5 Series 530xd
E61N 5 Series 525xi
E61N 5 Series 530d
E61N 5 Series 525xd
E61N 5 Series 525i
E61N 5 Series 520i
E61N 5 Series 525d
E61N 5 Series 520d
F07 5 Series 550iX 4.4
F07 5 Series 530d 155kW
F07 5 Series 550iX 4.0
F07 5 Series 550iX
F07 5 Series 550i
F07 5 Series 535i
F07 5 Series 535iX
F07 5 Series 535dX
F07 5 Series 530dX
F07 5 Series 530d
F07 5 Series 535d
F07 5 Series 520d
F07N 5 Series 550iX 4.4
F07N 5 Series 550iX
F07N 5 Series 550i
F07N 5 Series 550iX 4.0
F07N 5 Series 535i
F07N 5 Series 535iX
F07N 5 Series 535dX
F07N 5 Series 535d
F07N 5 Series 530dX
F07N 5 Series 530d
F07N 5 Series 520d
F07N 5 Series 528i
F10 5 Series M550dX
F10 5 Series 525dX
F10 5 Series M5
F10 5 Series Hybrid 5
F10 5 Series 550iX
F10 5 Series 535iX
F10 5 Series 550i
F10 5 Series 535i
F10 5 Series 530i
F10 5 Series 535d
F10 5 Series 535dX
F10 5 Series 530dX
F10 5 Series 528i
F10 5 Series 528iX
F10 5 Series 530d
F10 5 Series 525d
F10 5 Series 523i
F10 5 Series 520i
F10 5 Series 520d ed
F10 5 Series 520d
F10N 5 Series M550dX
F10N 5 Series Hybrid 5
F10N 5 Series 550i
F10N 5 Series 550iX
F10N 5 Series 535iX
F10N 5 Series 535i
F10N 5 Series 535dX
F10N 5 Series 535d
F10N 5 Series 530dX
F10N 5 Series 530d
F10N 5 Series 528iX
F10N 5 Series 528i
F10N 5 Series 525d
F10N 5 Series 520i
F10N 5 Series 520d
F10N 5 Series 518d
F10N 5 Series 520dX
F10N 5 Series 525dX
F11 5 Series M550dX
F11 5 Series 535d
F11 5 Series 550i
F11 5 Series 535iX
F11 5 Series 535i
F11 5 Series 535dX
F11 5 Series 530i
F11 5 Series 530dX
F11 5 Series 530d
F11 5 Series 528iX
F11 5 Series 528i
F11 5 Series 525dX
F11 5 Series 525d
F11 5 Series 523i
F11 5 Series 520i
F11 5 Series 520d
F11N 5 Series M550dX
F11N 5 Series 518d
F11N 5 Series 550i
F11N 5 Series 535iX
F11N 5 Series 535i
F11N 5 Series 535dX
F11N 5 Series 535d
F11N 5 Series 530d
F11N 5 Series 530dX
F11N 5 Series 528iX
F11N 5 Series 528i
F11N 5 Series 525dX
F11N 5 Series 525d
F11N 5 Series 520i
F11N 5 Series 520dX
F11N 5 Series 520d
F18 5 Series 535Li
F18 5 Series 530Li
F18 5 Series 528Li
F18 5 Series 523Li
F18 5 Series 520Li
F18 5 Series 525Li
F18N 5 Series 535Li
F18N 5 Series 528LiX
F18N 5 Series 530Li
F18N 5 Series 530Le
F18N 5 Series 525Li
F18N 5 Series 528Li
F18N 5 Series 520Li
G30 5 Series M550iX
G30 5 Series 518d
G30 5 Series 540iX
G30 5 Series 540i
G30 5 Series M550dX
G30 5 Series 530i
G30 5 Series 530iX
G30 5 Series 540dX
G30 5 Series 530eX
G30 5 Series 530e
G30 5 Series 530dX
G30 5 Series 530d
G30 5 Series 525d
G30 5 Series 520i 1.6
G30 5 Series 520i
G30 5 Series 520d ed
G30 5 Series 520dX
G30 5 Series 520d
F90 5 Series M5
G31 5 Series 518d
G31 5 Series M550dX
G31 5 Series 540iX
G31 5 Series 540dX
G31 5 Series 530iX
G31 5 Series 530dX
G31 5 Series 530d
G31 5 Series 525d
G31 5 Series 520i
G31 5 Series 520dX
G31 5 Series 520d
G31 5 Series 530i
G38 5 Series 540Li
G38 5 Series 525Li
G38 5 Series 530LiX
G38 5 Series 530Le
G38 5 Series 530Li
G38 5 Series 528Li
E63 6 Series M6
E63 6 Series 630i
E63 6 Series 645Ci
E63 6 Series 650i
E63N 6 Series 650i
E63N 6 Series 630i
E63N 6 Series 635d
E64 6 Series M6
E64 6 Series 645Ci
E64 6 Series 650i
E64 6 Series 630i
E64N 6 Series 635d
E64N 6 Series 650i
E64N 6 Series 630i
F06 6 Series 640d
F06 6 Series M6
F06 6 Series ALPINA B6
F06 6 Series 650iX 4.4
F06 6 Series 650iX
F06 6 Series 650iX 4.0
F06 6 Series 650i
F06 6 Series 640iX
F06 6 Series 640i
F06 6 Series 640dX
F06N 6 Series 640d
F06N 6 Series M6
F06N 6 Series ALPINA B6
F06N 6 Series 650iX 4.4
F06N 6 Series 650iX
F06N 6 Series 650iX 4.0
F06N 6 Series 650i
F06N 6 Series 640iX
F06N 6 Series 640i
F06N 6 Series 640dX
F12 6 Series M6
F12 6 Series 640d
F12 6 Series 650iX 4.4
F12 6 Series 650iX 4.0
F12 6 Series 650i
F12 6 Series 650iX
F12 6 Series 640i
F12 6 Series 640iX
F12 6 Series 640dX
F12N 6 Series M6
F12N 6 Series 650i
F12N 6 Series 650iX 4.4
F12N 6 Series 650iX 4.0
F12N 6 Series 650iX
F12N 6 Series 640iX
F12N 6 Series 640i
F12N 6 Series 640dX
F12N 6 Series 640d
F13 6 Series M6
F13 6 Series 640iX
F13 6 Series 650iX 4.4
F13 6 Series 650iX 4.0
F13 6 Series 650i
F13 6 Series 650iX
F13 6 Series 640dX
F13 6 Series 640i
F13 6 Series 640d
F13N 6 Series 650iX 4.4
F13N 6 Series M6
F13N 6 Series 650iX 4.0
F13N 6 Series 650i
F13N 6 Series 650iX
F13N 6 Series 640iX
F13N 6 Series 640i
F13N 6 Series 640dX
F13N 6 Series 640d
G32 6 Series 640iX
G32 6 Series 640i
G32 6 Series 640dX
G32 6 Series 630dX
G32 6 Series 630iX
G32 6 Series 630i
G32 6 Series 620dX
G32 6 Series 630d
G32 6 Series 620d
E65 7 Series 730i
E65 7 Series ALPINA B7
E65 7 Series 760i
E65 7 Series 750i
E65 7 Series 745i
E65 7 Series 745d
E65 7 Series 740i
E65 7 Series 740d
E65 7 Series 735i
E65 7 Series 730d
E66 7 Series 760Li
E66 7 Series 750Li
E66 7 Series 745Li
E66 7 Series 730Li
E66 7 Series 735Li
E66 7 Series 730Ld
E66 7 Series 740Li
E67 7 Series 745LiS
E67 7 Series 760LiS
F01 7 Series 730d
F01 7 Series ALPINA B7X
F01 7 Series ALPINA B7
F01 7 Series 750iX
F01 7 Series 760i
F01 7 Series 750i
F01 7 Series 740d
F01 7 Series 740dX
F01 7 Series 740i
F01 7 Series 730i
F01N 7 Series Hybrid 7
F01N 7 Series 730dX
F01N 7 Series ALPINA B7X
F01N 7 Series ALPINA B7
F01N 7 Series 760i
F01N 7 Series 750iX
F01N 7 Series 750i
F01N 7 Series 750dX
F01N 7 Series 740d
F01N 7 Series 740i
F01N 7 Series 740dX
F01N 7 Series 730i
F01N 7 Series 730d
F02 7 Series ALPINA B7L
F02 7 Series ALPINA B7LX
F02 7 Series 760Li
F02 7 Series 750LiX
F02 7 Series 750Li
F02 7 Series 740Li
F02 7 Series 730Ld
F02 7 Series 730Li
E38 7 Series 725tds
E38 7 Series 728i
E38 7 Series 730d
E38 7 Series 740d
E38 7 Series 730i
E38 7 Series 735i
E38 7 Series 740i
E38 7 Series 750i
E38 7 Series 740iLP
E38 7 Series 728iL
E38 7 Series 735iL
E38 7 Series 740iL
E38 7 Series 750iL
E38 7 Series 730iL
E38 7 Series 750iLS
E38 7 Series L7
E38 7 Series 750iLP
F02N 7 Series Hybrid 7L
F02N 7 Series 740LiX
F02N 7 Series ALPINA B7LX
F02N 7 Series ALPINA B7L
F02N 7 Series 760Li
F02N 7 Series 750LiX 4.4
F02N 7 Series 750LiX 4.0
F02N 7 Series 750LiX
F02N 7 Series 750LdX
F02N 7 Series 750Li
F02N 7 Series 740Li
F02N 7 Series 740LdX
F02N 7 Series 730Li
F02N 7 Series 730Ld
F03 7 Series 760LiS
F03 7 Series 750LiS
F03N 7 Series 760LiS
F03N 7 Series 750LiS
F04 7 Series Hybrid 7
F04 7 Series Hybrid 7L
G11 7 Series 750iX
G11 7 Series 730d
G11 7 Series 750dX
G11 7 Series 750i
G11 7 Series 740i
G11 7 Series 740dX
G11 7 Series 740e
G11 7 Series 730i
G11 7 Series 730dX
G11 7 Series 725d
G11N 7 Series 740dX
G11N 7 Series 750iX
G11N 7 Series 750dX
G11N 7 Series 745e
G11N 7 Series 740i
G11N 7 Series 730i
G11N 7 Series 730dX
G11N 7 Series 730d
G12 7 Series 730LdX
G12 7 Series M760LiX
G12 7 Series M760iX
G12 7 Series ALPINA B7
G12 7 Series 750LiX 4.4
G12 7 Series 750LiX 4.0
G12 7 Series 750iX
G12 7 Series 750Li
G12 7 Series 750LdX
G12 7 Series 750i
G12 7 Series 740Li
G12 7 Series 740LiX
G12 7 Series 740LeX
G12 7 Series 740Le
G12 7 Series 740iX
G12 7 Series 740LdX
G12 7 Series 740i
G12 7 Series 740eX
G12 7 Series 730Li
G12 7 Series 730Ld
G12 7 Series 725Ld
G12N 7 Series M760LiX
G12N 7 Series 740i
G12N 7 Series M760iX
G12N 7 Series 750LiX
G12N 7 Series ALPINA B7
G12N 7 Series 750iX
G12N 7 Series 750LdX
G12N 7 Series 745LeX
G12N 7 Series 745Le
G12N 7 Series 740LiX
G12N 7 Series 745eX
G12N 7 Series 740Li
G12N 7 Series 740iX
G12N 7 Series 740LdX
G12N 7 Series 730Li
G12N 7 Series 730LdX
G12N 7 Series 730Ld
G14 8 Series 840dX
G14 8 Series 840iX
G14 8 Series M850iX
G14 8 Series 840i
F91 8 Series M8
G15 8 Series 840iX
G15 8 Series M850iX
G15 8 Series 840i
G15 8 Series 840dX
F92 8 Series M8
G16 8 Series 840iX
G16 8 Series M850iX
G16 8 Series 840i
G16 8 Series 840dX
F93 8 Series M8
E84 X1 Series X1 18i
E84 X1 Series X1 28iX
E84 X1 Series X1 25iX
E84 X1 Series X1 20i
E84 X1 Series X1 28i
E84 X1 Series X1 35iX
E84 X1 Series X1 25dX
E84 X1 Series X1 20iX
E84 X1 Series X1 18d
E84 X1 Series X1 20d
E84 X1 Series X1 18dX
E84 X1 Series X1 20dX
E84 X1 Series X1 23dX
E84 X1 Series X1 16i
E84 X1 Series X1 16d
E84 X1 Series X1 20d ed
F48 X1 Series X1 18i
F48 X1 Series X1 20i
F48 X1 Series X1 20iX
F48 X1 Series X1 25iX
F48 X1 Series X1 28iX
F48 X1 Series X1 16d
F48 X1 Series X1 18d
F48 X1 Series X1 18dX
F48 X1 Series X1 20d
F48 X1 Series X1 20dX
F48 X1 Series X1 25dX
F48 X1 Series X1 28i
F48N X1 Series X1 28iX
F48N X1 Series X1 18d
F48N X1 Series X1 28i
F48N X1 Series X1 25dX
F48N X1 Series X1 25iX
F48N X1 Series X1 20i
F48N X1 Series X1 20iX
F48N X1 Series X1 20dX
F48N X1 Series X1 20d
F48N X1 Series X1 18i
F48N X1 Series X1 18dX
F48N X1 Series X1 16d
F49 X1 Series X1 25LeX
F49 X1 Series X1 25LiX
F49 X1 Series X1 20LiX
F49 X1 Series X1 20Li
F49 X1 Series X1 18Li
F49N X1 Series X1 25LiX
F49N X1 Series X1 30LeX
F49N X1 Series X1 25Li
F49N X1 Series X1 20Li
F39 X2 Series X2 20iX
F39 X2 Series X2 18i
F39 X2 Series X2 20i
F39 X2 Series X2 25i
F39 X2 Series X2 25iX
F39 X2 Series X2 28i
F39 X2 Series X2 28iX
F39 X2 Series X2 16d
F39 X2 Series X2 18d
F39 X2 Series X2 18dX
F39 X2 Series X2 20d
F39 X2 Series X2 20dX
F39 X2 Series X2 25dX
F39 X2 Series X2 M35iX
E83 X3 Series X3 2.0i
E83 X3 Series X3 2.5i
E83 X3 Series X3 3.0i
E83 X3 Series X3 2.0d
E83 X3 Series X3 3.0d
E83N X3 Series X3 2.0i
E83N X3 Series X3 2.5si
E83N X3 Series X3 3.0i
E83N X3 Series X3 3.0si
E83N X3 Series X3 2.0d
E83N X3 Series X3 3.0sd
E83N X3 Series X3 3.0d
E83N X3 Series X3 1.8d
F25 X3 Series X3 18i
F25 X3 Series X3 20i
F25 X3 Series X3 20iX
F25 X3 Series X3 28iX
F25 X3 Series X3 35iX
F25 X3 Series X3 18d
F25 X3 Series X3 20dX
F25 X3 Series X3 28dX
F25 X3 Series X3 30dX
F25 X3 Series X3 35dX
F25 X3 Series X3 28i
G01 X3 Series X3 20dX
G01 X3 Series X3 20i
G01 X3 Series X3 20iX
G01 X3 Series X3 30dX
G01 X3 Series X3 20i (TR12)
G01 X3 Series X3 20i (TR16)
G01 X3 Series X3 20i 1.6
G01 X3 Series X3 20iX (TR51)
G01 X3 Series X3 20iX (TR52)
G01 X3 Series X3 20iX (TR55)
G01 X3 Series X3 20iX (TR56)
G01 X3 Series X3 30i
G01 X3 Series X3 30iX (TR91)
G01 X3 Series X3 30iX (TR92)
G01 X3 Series X3 30iX
G01 X3 Series X3 30iX (TR95)
G01 X3 Series X3 30iX (TR96)
G01 X3 Series X3 30eX
G01 X3 Series X3 M40iX
G01 X3 Series X3 18d (TX11)
G01 X3 Series X3 18d (TX12)
G01 X3 Series X3 18d (TX15)
G01 X3 Series X3 18d (TX16)
G01 X3 Series X3 20dX (TX31)
G01 X3 Series X3 20dX (TX32)
G01 X3 Series X3 20dX (TX35)
G01 X3 Series X3 20dX (TX36)
G01 X3 Series X3 25dX (TX51)
G01 X3 Series X3 25dX (TX55)
G01 X3 Series X3 30dX (TX71)
G01 X3 Series X3 30dX (TX72)
G01 X3 Series X3 30dX (TX75)
G01 X3 Series X3 30dX (TX76)
G01 X3 Series X3 M40dX (TX91)
G01 X3 Series X3 M40dX (TX92)
G01 X3 Series X3 M40dX (TX95)
G01 X3 Series X3 M40dX (TX96)
G01 X3 Series X3 18d
G08 X3 Series X3 28iX
G08 X3 Series X3 25iX
G08 X3 Series X3 30iX
F97 X3 Series X3 M
F26 X4 Series X4 M40iX
F26 X4 Series X4 20dX
F26 X4 Series X4 35iX
F26 X4 Series X4 35dX
F26 X4 Series X4 30dX
F26 X4 Series X4 28iX
F26 X4 Series X4 20iX
F98 X4 Series X4 M
G02 X4 Series X4 30iX
G02 X4 Series X4 M40iX
G02 X4 Series X4 20iX
G02 X4 Series X4 20dX
G02 X4 Series X4 25dX
G02 X4 Series X4 30dX
G02 X4 Series X4 M40dX
E53 X5 Series X5 4.8is
E53 X5 Series X5 4.6is
E53 X5 Series X5 4.4i
E53 X5 Series X5 3.0i
E53 X5 Series X5 3.0d
E70 X5 Series X5 M
E70 X5 Series X5 3.5d
E70 X5 Series X5 4.8i
E70 X5 Series X5 3.0si
E70 X5 Series X5 3.0sd
E70 X5 Series X5 3.0d
E70N X5 Series X5 50iX
E70N X5 Series X5 M50dX
E70N X5 Series X5 40iX
E70N X5 Series X5 40dX
E70N X5 Series X5 35iX
E70N X5 Series X5 35dX
E70N X5 Series X5 30dX
F15 X5 Series X5 M50dX
F15 X5 Series X5 50iX 4.4
F15 X5 Series X5 50iX 4.0
F15 X5 Series X5 50iX
F15 X5 Series X5 40dX
F15 X5 Series X5 35iX
F15 X5 Series X5 35i
F15 X5 Series X5 35dX
F15 X5 Series X5 25dX
F15 X5 Series X5 28iX
F15 X5 Series X5 30dX
F15 X5 Series X5 40eX
F15 X5 Series X5 25d
F85 X5 Series X5 M
G05 X5 Series X5 40iX
G05 X5 Series X5 M50iX
G05 X5 Series X5 M50dX
G05 X5 Series X5 50iX
G05 X5 Series X5 45eX
G05 X5 Series X5 30iX
G05 X5 Series X5 40i
G05 X5 Series X5 30dX
G05 X5 Series X5 25dX
E71 X6 Series X6 M50dX
E71 X6 Series X6 35dX
E71 X6 Series X6 50iX
E71 X6 Series X6 M
E71 X6 Series X6 40iX
E71 X6 Series X6 35iX
E71 X6 Series X6 40dX
E71 X6 Series X6 30dX
E72 X6 Series Hybrid X6
F16 X6 Series X6 M50dX
F16 X6 Series X6 50iX 4.4
F16 X6 Series X6 50iX 4.0
F16 X6 Series X6 35iX
F16 X6 Series X6 50iX
F16 X6 Series X6 40dX
F16 X6 Series X6 28iX
F16 X6 Series X6 35i
F16 X6 Series X6 30dX
G06 X6 Series X6 M50iX
G06 X6 Series X6 40i
G06 X6 Series X6 M50dX
G06 X6 Series X6 40iX
G06 X6 Series X6 30iX
G06 X6 Series X6 30dX
G07 X7 Series X7 30dX
G07 X7 Series X7 40iX
G07 X7 Series X7 M50iX
G07 X7 Series X7 50iX
G07 X7 Series X7 M50dX
Z3 Z3 Series Z3 M
Z3 Z3 Series Z3 3.0i
Z3 Z3 Series Z3 2.8
Z3 Z3 Series Z3 2.5i
Z3 Z3 Series Z3 2.2i
Z3 Z3 Series Z3 2.5
Z3 Z3 Series Z3 2.0
Z3 Z3 Series Z3 1.9
Z3 Z3 Series Z3 1.8
E85 Z4 Series Z4 3.0si
E85 Z4 Series Z4 M3.2
E85 Z4 Series Z4 3.0i
E85 Z4 Series Z4 2.5si
E85 Z4 Series Z4 2.5i
E85 Z4 Series Z4 2.2i
E85 Z4 Series Z4 2.0i
E86 Z4 Series Z4 M3.2
E86 Z4 Series Z4 3.0si
E89 Z4 Series Z4 35is
E89 Z4 Series Z4 23i
E89 Z4 Series Z4 35i
E89 Z4 Series Z4 28i
E89 Z4 Series Z4 30i
E89 Z4 Series Z4 20i
E89 Z4 Series Z4 18i
G29 Z4 Series Z4 M40i
G29 Z4 Series Z4 20i
G29 Z4 Series Z4 30i
E52 Z8 Series Z8
E52 Z8 Series ALPINA V8
R50 MINI Series One 1.6i
R50 MINI Series One D
R50 MINI Series Cooper
R50 MINI Series One 1.4i
R53 MINI Series Cooper S
R53 MINI Series Coop.S JCW GP
R56 MINI Series Cooper
R56 MINI Series One D
R56 MINI Series Cooper S
R56 MINI Series One
R56 MINI Series Cooper D
R56 MINI Series Coop.S JCW
R56 MINI Series Coop.S BEV
R56N MINI Series One Eco 55kW
R56N MINI Series Cooper
R56N MINI Series One Eco
R56N MINI Series One 55kW
R56N MINI Series One D
R56N MINI Series One
R56N MINI Series Cooper SD
R56N MINI Series Cooper S
R56N MINI Series Cooper D 2.0
R56N MINI Series Cooper D 1.6
R56N MINI Series Coop.S JCW
F56 MINI Series One First
F56 MINI Series One D
F56 MINI Series One
F56 MINI Series JCW
F56 MINI Series Cooper S
F56 MINI Series Cooper SD
F56 MINI Series Cooper D
F56 MINI Series Cooper
F55 MINI Series One First
F55 MINI Series One
F55 MINI Series One D
F55 MINI Series Cooper SD
F55 MINI Series Cooper S
F55 MINI Series Cooper
F55 MINI Series Cooper D
R55 MINI Clubman Series One
R55 MINI Clubman Series Cooper S
R55 MINI Clubman Series Cooper d
R55 MINI Clubman Series Cooper
R55 MINI Clubman Series Coop.S JCW
R55N MINI Clubman Series One D
R55N MINI Clubman Series One
R55N MINI Clubman Series Cooper SD
R55N MINI Clubman Series Cooper S
R55N MINI Clubman Series Cooper D 2.0
R55N MINI Clubman Series Cooper D 1.6
R55N MINI Clubman Series Cooper
R55N MINI Clubman Series Coop.S JCW
F54 MINI Clubman Series Cooper
F54 MINI Clubman Series One D
F54 MINI Clubman Series One
F54 MINI Clubman Series Cooper SD
F54 MINI Clubman Series JCW ALL4
F54 MINI Clubman Series Cooper SD ALL4
F54 MINI Clubman Series Cooper S ALL4
F54 MINI Clubman Series Cooper S
F54 MINI Clubman Series Cooper D
F54 MINI Clubman Series Cooper ALL4
F54N MINI Clubman Series Cooper S ALL4
F54N MINI Clubman Series One D
F54N MINI Clubman Series One
F54N MINI Clubman Series JCW ALL4
F54N MINI Clubman Series Cooper SD
F54N MINI Clubman Series Cooper S
F54N MINI Clubman Series Cooper D
F54N MINI Clubman Series Cooper ALL4
F54N MINI Clubman Series Cooper
F54N MINI Clubman Series Cooper SD ALL4
R52 MINI Cabrio Series One
R52 MINI Cabrio Series Cooper
R52 MINI Cabrio Series Cooper S
R57 MINI Cabrio Series Cooper S
R57 MINI Cabrio Series Cooper
R57 MINI Cabrio Series Coop.S JCW
R57N MINI Cabrio Series One
R57N MINI Cabrio Series Coop.S JCW
R57N MINI Cabrio Series Cooper SD
R57N MINI Cabrio Series Cooper S
R57N MINI Cabrio Series Cooper D 2.0
R57N MINI Cabrio Series Cooper D 1.6
R57N MINI Cabrio Series Cooper
F57 MINI Cabrio Series One
F57 MINI Cabrio Series Cooper
F57 MINI Cabrio Series JCW
F57 MINI Cabrio Series Cooper SD
F57 MINI Cabrio Series Cooper S
F57 MINI Cabrio Series Cooper D
R58 MINI Coupe Series Cooper SD
R58 MINI Coupe Series Cooper S
R58 MINI Coupe Series Coop.S JCW
R58 MINI Coupe Series Cooper
R59 MINI Roadster Series Cooper SD
R59 MINI Roadster Series Cooper
R59 MINI Roadster Series Cooper S
R59 MINI Roadster Series Coop.S JCW
R60 MINI Countryman Series One D
R60 MINI Countryman Series Cooper SD
R60 MINI Countryman Series One
R60 MINI Countryman Series JCW ALL4
R60 MINI Countryman Series Cooper SD ALL4
R60 MINI Countryman Series Cooper S ALL4
R60 MINI Countryman Series Cooper S
R60 MINI Countryman Series Cooper D ALL4 2.0
R60 MINI Countryman Series Cooper D ALL4 1.6
R60 MINI Countryman Series Cooper D 2.0
R60 MINI Countryman Series Cooper D 1.6
R60 MINI Countryman Series Cooper
R60 MINI Countryman Series Cooper ALL4
F60 MINI Countryman Series Cooper
F60 MINI Countryman Series Cooper S
F60 MINI Countryman Series Cooper S ALL4
F60 MINI Countryman Series One D
F60 MINI Countryman Series Cooper D
F60 MINI Countryman Series Cooper D ALL4
F60 MINI Countryman Series Cooper SD
F60 MINI Countryman Series Cooper SD ALL4
F60 MINI Countryman Series Cooper SE ALL4
F60 MINI Countryman Series Cooper ALL4
F60 MINI Countryman Series One
F60 MINI Countryman Series JCW ALL4
R61 MINI Paceman Series JCW ALL4
R61 MINI Paceman Series Cooper D ALL4 1.6
R61 MINI Paceman Series Cooper SD ALL4
R61 MINI Paceman Series Cooper SD
R61 MINI Paceman Series Cooper S ALL4
R61 MINI Paceman Series Cooper S
R61 MINI Paceman Series Cooper D ALL4 2.0
R61 MINI Paceman Series Cooper D 2.0
R61 MINI Paceman Series Cooper D 1.6
R61 MINI Paceman Series Cooper
R61 MINI Paceman Series Cooper ALL4
E31 8 Series 850CSi
E31 8 Series 850Ci
E31 8 Series 840i
E31 8 Series 840Ci
G80 3 Series M3
Please read the following before beginning this repair.
- Before starting this advanced repair, please we aware that you will need a diagnostic tool that has the ability to calibrate the flow rates of your new injectors. The BMW Repair Guide uses ISTA+ (Rheingold) software to program their injectors, but most other popular BMW diagnostic tools have this ability including the Schwaben/Foxwell nt510. YOU MUST calibrate your new injectors after installation in order for them to operate correctly. Please see our video on injector calibration at the end of this article.
- You will also need a special fuel injector extraction/installation tool to do this repair. We have prepared a detailed video on how to use this tool - please see section 4 below to view video. Please see our links below in "Tools and Supplies" on where to purchase this tool prior to starting the repair.
- This repair is for the BMW N55 direct injection engine only. Please click on the following box to verify this repair applies to your vehicle before starting:
A BMW fuel injector replacement on the N55 twin turbo six cylinder engine is a lengthy repair, but will save you thousands of dollars on parts and labor by "Doing It Yourself" and not going to your local repair shop.
One of the unfortunate evils of owning a BMW with the N55 twin-turbo engine is increased maintenance. As wonderful as these engines are, they are notorious for their mechanical issues. Add the sad fact that many of the original owners of these cars didn't properly maintain them, and you have a recipe for impending disaster...especially on N55 engines with over 100,000 miles.
When you get north of 100,000 miles, you can pretty much expect to perform a BMW fuel injector replacement on these engines. Injectors get fouled over the years from poor fuel choices and not regularly using a good fuel additive like Techron. Driving a vehicle on fouled or clogged injectors can cause further damage and may ultimately lead to injector failure.
The BMW N55 engine uses direct injection which further complicates the matter. A direct injection is a form of fuel injection, where the gasoline is atomized directly into the cylinder under extremely high pressure. Direct injectors are prone to carbon buildup and are subjected to a continuously brutal environment inside the combustion chamber of the engine.
Fuel injectors in the BMW N55 engine are also prone to sticking open. This is a very serious condition where the injector continues to spray fuel into the cylinder. As the fuel builds up in the combustion chamber(s) it will cause multiple cylinder misfires and plumes of noxious white smoke to be ejected from the tailpipes. Driving the car in this condition will cause catastrophic damage to the engine and a tow truck ride to the scrap yard.
Using the correct fuel injector removal tool
There seems to be some confusion as to what tool and method are best for extracting a fuel injector from the cylinder head of an N55 engine. The first rule of thumb is this; if your vehicle is close to/over 100,000 miles, most likely your fuel injectors will be stuck and require a removal tool to get them out.
Secondly, only use a BMW OEM extraction/installation tool and a good low torque wrench to remove and reinstall the injectors in your N55 engine. There are a lot of BMW owners out there that have come up with creative ways to pull out a stuck injector...from using coat hangers to dental picks and pliers. We urge our readers to use the proper tool and follow our instructions below on how to use it. The money saved by doing this repair yourself will exponentially outweigh the cost of buying the tool. And most importantly you will avoid any damage to the new injector or your engine.
Be aware that are two different tool mounting configurations in the BMW N55 engine; a horizontal configuration and a vertical configuration. Always check your mounting bolt layout before ordering your tool.
If the video does not appear below, please click here to view
View the video version of this repair.
View the detailed parts diagram for this repair.
Includes detailed part diagrams, part numbers and links to purchase all of the required components needed to complete this repair.
Before starting this repair, you must have the following required parts.
For most N20 4-cyliner and N55 6-cylinder engines
Direct injection fuel injectors are notoriously expensive. Many home mechanics try and save money by installing "imported" aftermarket injectors often found on sites like Amazon and Ebay. Big mistake. Please take our word on this...you get what you pay for with fuel injectors. Cheap aftermarket versions will fail and can even possibly cause major damage to your engine. Don't cut corners - even if you have to take out a loan, only install Genuine BMW fuel injectors like this one in your vehicle.
For N55 engine vehicles only with production date up to 01/2011
If you are experience a rough idle, misfire, or check engine light, this could be the problem. Fuel injectors for turbocharged BMWs have been a common failure item. It is highly recommended to replace older injectors also if your car is modified or you plan to modify it.
Fits all BMW vehicles
The decoupling ring is essential for proper fuel injector installation. Never use the old rings from the injectors you are replacing.
Section 1 - Removing The Cabin Filter Assembly
The cabin filter assembly must be removed in order to access the rear fuel injectors in cylinders 5 and 6.
- Use a socket wrench to disconnect the negative terminal from the battery before starting this repair. Always cover the terminal with a clean rag to avoid accidental contact during the repair. If working on a vehicle with 2 batteries (8 series), disconnect the negative terminal from both batteries. ALWAYS disconnect the battery(s) before performing any type of mechanical repair, especially in the engine compartment.
- Remove the five 8mm screws anchoring the upper filter housing. Remove upper filter housing from the vehicle.
- Unsnap and remove the two side covers (both left and right) from the lower filter housing and remove them from the vehicle.
- Remove the right and left electrical connections from the lower filter housing.
- Use an 8mm nut driver to remove the two screws anchoring the lower filter housing to the vehicle. There is a screw-on both the right (passenger) and left (drivers) side of the lower filter housing.
- Remove the lower filter housing from the vehicle.
Section 2 - Intake Air Duct Removal
- Use a flat blade screwdriver to remove the Mass Air Flow (MAF) electrical connector from the front duct.
- Loosen hose clamp connecting air cleaner assembly to the front duct. Unclip the lid of the air cleaner assembly and remove it.
- Remove the 10mm bolt anchoring the top air duct assembly to the cylinder head.
- Remove the electrical connector from the crankcase vent hose.
- Use a flat blade screwdriver to pry the crankcase vent hose off of it’s cylinder head connector. This part is made of stiff plastic that becomes very brittle with age, and is prone to breaking during removal. In fact you can see in the step 4 photo above we broke ours by accident. If you break your vent hose, click to reorder here (BMW part # 11127584128).
- Use a T25 torx bit on a long extension to remove the screw securing the air duct assembly to the bottom air duct. BE CAREFUL...don’t drop screw into engine.
- Remove the air duct assembly from engine.
- Use an E16 external torx socket to remove the bolt securing the right strut brace to the vehicles body and pivot out of the way. This needs to be done to gain access to cylinder 5 and 6 fuel injectors.
Section 3 - Preparing for Fuel Injector Removal
- Remove the ignition coil from the cylinder in which you are performing the fuel injector service by releasing the electrical connector and pulling it straight out of spark plug tube. Use a socket extension to help pull the coil out if it is stuck. Remove the ignition coil from the adjacent cylinder as well.
- Use a 14mm open end wrench to loosen the fuel line nuts on both cylinders. ***Fuel line may be under pressure. Have a rag ready to catch any fuel that may be ejected from fuel line. Remove fuel lines from engine.
- Remove both fuel injector electrical connectors. These connectors can be tricky to remove. Insert a small flat blade screw driver down the left side of the connector and it will release and pull straight out (see image below). DO NOT try and pull out with force...you will break the connector and hence be in a world of sh!t.
- Use an 8mm socket to remove the ground wire nut. Remove ground wire from cylinder head.
- Optional step - Remove the inspection screw plug using an 8mm hex socket. This is a completely optional step, and has no bearing on completing this repair. It is simply an inspection hole that is used to view the injector slot during routine maintenance. We like to remove it so we can lubricate the threads in the event it needs to be used at a later date to inspect the injectors.
- Use a deep 8mm socket to remove the front bolt securing the support bridge to the engine.
- Use an E8 external torx socket to remove the rear bolt securing the support bridge to the engine.
- Use the E8 external socket to also remove the lower bolt securing the injector cover plate to the engine.
- Remove the clamping plate and the support bridge from the engine.
- Remove the injector cover plate from the engine.
- Using an E10 external torx socket, remove the bolt securing the bottom hold down bracket to the cylinder head.
- Use a pair of long nose pliers to extract the bottom hold down bracket from engine. It’s a bit tricky so use patience...you have to tilt the bracket to coax it out from around the fuel injectors.
Section 4 - Removing and Installing Fuel Injectors
Please watch the following video on how to remove and install your fuel injectors using the N55 fuel injector tool. We have also included written instructions with photos after the video.
- ***Before proceeding, please be sure you are using BMW tool #130270 to extract the fuel injectors on the N55 engine (see our discussion above). Before placing the extraction tool in the engine, unscrew the two threaded pullouts (A) so they are at the halfway mark in the tool.
- Place the tool in the injector slot. Make sure the threaded sleeves and pullouts (A and B) are lined up over the fuel injectors. Hand tighten the two anchor bolts (C) into the cylinder head. Double check to make sure tool is square and everything is lined up correctly.
- Gently turn the threaded pullouts (B) counterclockwise until they stop turning. DO NOT hand tighten. You are simply lowering the threaded sleeve (A) onto the injector head in preparation for the next step (see above video).
- Hand tighten the threaded sleeves (A) clockwise onto the injectors until they are snug. ***If you are only removing one injector, only tighten the threaded sleeve (A) on the injector being removed (leave the other one loose) (see video).
- Tighten the two anchor bolts (C) and torque to 9 Nm (7 ft-lb) (80 in-lb).
- Attach a 24mm crow’s foot socket to a low torque wrench. This will require the use of socket reducers since the 24mm crow’s foot will be ½” drive, and most low torque socket wrenches are ¼” drive. Please see the following photo to see how we handle it.
- Set the torque wrench to 5 Nm (3.5 ft-lb). Attach the crow’s foot to the threaded pullout (B) (NOT the threaded sleeve (A)) and turn CLOCKWISE. Remember, the threaded pullout has a reverse thread so turning clockwise will pull the injector out. Try not to exceed the 5 Nm on the torque wrench. There should not be any reason why you should exceed 5 Nm when extracting the injector, unless you are turning the wrong way!
- When the injector(s) are extracted, loosen the anchor bolts and remove the tool with the injectors attached.
- Place the tool on a bench and remove the old injector.
- Unpack the new injector. Look at the part number side to verify it is correct (we suggest taking a photo). Flip the injector over and take another photo of the numbers on that side. ***You will need the three digit calibration number to program the flow rate in the new injector. DO NOT install the new injector without writing down this number. We highly recommend taking a photo of both sides of the injector before installing so there are no issues during the calibration phase.
- Verify that the injector seal is installed on the new injector. All new BMW injectors ship with the injector seal already installed.
- Unpack the new decoupling element. Notice that the sides are different. One side has a thin ring.
- Slide the decoupling element on the new injector with the thin ring facing the inside as shown in the following image. Press on the decoupling element until it snaps into place.
- The new injector can now be installed. Start by placing the injector LOOSELY back into the engine. Do not apply force.
- This is a very important step, so please follow carefully. Note the location of the electrical connector and the threaded head of the injector. These MUST line up with the cutouts in the cover plate, or you will not be able to complete the installation. Make sure the injector is installed with the electrical connector on the left side and the injector threads are vertical so they match the cover plate cutouts (see image below).
- Unscrew (turn clockwise) the threaded pullouts (B) so they all the way out of the tool.
- Install tool into the injector slot and attach to fuel injectors as outlined in steps 2-6 above.
- Set the torque wrench to 4 Nm (3 ft-lb).
- Turn the threaded pullout (B) COUNTER-CLOCKWISE, pushing the fuel injector into the cylinder head until torque is reached.
- Release retaining pin by pushing in (use a pair of pliers if necessary). Releasing the retaining pin allows the threaded sleeve (A) to be removed.
- Remove threaded sleeve (A) by turning counterclockwise, using a 14mm open end wrench to first loosen it and then finishing with your fingers.
- Temporarily install cover plate to insure injectors line up with openings. If they do not, use a 14mm open end wrench and VERY GENTLY turn the injector in the direction needed so it lines up with cover plate. Once again, we stress VERY GENTLE micro turns until it lines up correctly.
- Injector is now properly installed. Repeat with other injectors being replaced.
- When finished installing injector(s), reassemble engine following steps in Section 1, Section 2 and Section 3 above in reverse order.
Section 5 - BMW N55 Fuel Injector Calibration - Injector Quantity Compensation
You will need to calibrate your BMW N55 fuel injector flow rates before you can run the engine. The reason the injectors must be calibrated is that the vehicle's DME (Engine Control Unit) does not know what the true flow rate of the injectors is...just what they are supposed to be for the engine to operate efficiently. Therefore, we must tell the DME what the true flow rates are. With the true rates stored in its memory, the DME will calibrate the injectors so they all spray fuel into the cylinder at the same rate.
In order to calibrate the injectors you will need a diagnostic tool that supports this function. The BMW Repair Guide uses ISTA+ (Rheingold) to calibrate their direct fuel injectors, although many BMW handheld diagnostic tools on the market support this function, including the popular Schwaben/Foxwell nt510 and the Autel MX808.
The following video show you how to calibrate the injectors using ISTA+:
BMW N55 Fuel Injector Replacement Finished
