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This article gives detailed instructions on replacing the fuel injectors in BMW E9x M3 with the S65 8 cylinder engine. Even though we used a 2013 M3 coupe (E92) to perform this repair, this article can be applied to any 2007-2013 BMW M3 vehicle with minor modifications to the repair steps.
See all vehicles this article applies to
E90 3 Series M3
E90N 3 Series M3
E92 3 Series M3
E92N 3 Series M3
E93 3 Series M3
E93N 3 Series M3
E90N 3 Series M3 CRT
A BMW E9x fuel injector replacement is actually an easy repair for the home mechanic with average abilities and can save the owner thousands of dollars.
If you ask any BMW enthusiast that has owned a 2007-2013 M3 (E9x) what they like about their vehicle, I would wager they would reply "everything". That's how perfect this car is. And I'm not just saying that because I read a review on one somewhere...I'm saying it because I'm an actual owner.
The 2007-2013 M3 is the only M3 ever produced by BMW with a V8 engine, and I would wager once again it will be its last. The company changed the M3 engine to a turbocharged six-cylinder in 2014 which is still in production as of now. But as the auto industry quickly transitions to electric power, it is safe to assume the days of the M3's V8 are as extinct as the dodo bird.
The E9x M3 contains the iconic S65 naturally aspirated V8 engine which is pretty rock solid when treated with respect. With over 70,000 miles on mine as of the date of writing this article, I can truthfully say I have never had any issues whatsoever. But I am a big advocate of preventive maintenance, and I always service the vehicle long before it needs it. One of the best, and easiest, preventive maintenance repairs you can perform on your V8 M3 is a fuel injector replacement.
When the fuel injectors on your E9x M3 begin to wear out, you will quickly notice - the engine will run rough and there will be a noticeable decline in acceleration and throttle response. Replacing your fuel injectors will return that factory-fresh performance to your S65 V8 and can prevent any long-term damage to the engine.
The good news is you don't have to use the ultra-expensive "Genuine BMW" fuel injectors to do this repair. In fact, I used Bosch fuel injectors to do this article which cost a fraction of the price. The fuel injectors on the 8-cylinder M3 are surprisingly easy to access and remove - they are conveniently located under the intake plenum (also referred to as the intake manifold or air collector). Removing the intake only involves some simple tools, and the entire procedure can be performed in about two hours. Please see the "Repair Steps" tab for detailed step-by-step instructions as well as a repair video for your convenience.
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.
Section 1 - Removing the air plenum from 2007-2013 BMW M3sAs previously discussed, removing the air plenum is a necessary procedure that should be mastered by all M3 V8 owners that service their own vehicles, and it is required for performing a fuel injector replacement on your E9x M3. Please click here for step-by-step instructions on removing the air plenum from your 20007-2013 M3 - BMW E9x M3 Intake Plenum Removal – 2007-2013 S65 V8 Engine
Section 2 - Removing and replacing the fuel injectors in 2007-2013 BMW M3 vehiclesOnce the air plenum is removed from the top of the engine, the fuel injectors can be easily removed. They are located on the "U" shaped fuel rail that is attached to the cylinder head, and are accessible without removing other parts. You DO NOT have to calibrate the fuel injectors in 2007-2013 M3s.
- Locate the fuel rail as shown below. Using a T-25 torx bit, remove the four bolts securing the fuel rail to the top of the engine.
- Locate the fuel line disconnect on the left side of the engine compartment. Use a pick or small screwdriver to remove the plastic locking ring. Use a fuel line removal tool to compress the quick disconnect. Pull the fuel line free. Make sure to have a few rags ready to catch any fuel that may drip out.
- Unsnap the fuel rail from the plastic clips.
- Starting on the left side, grasp the fuel rail and gently pull the front fuel injectors free from the engine.
- Using a metal pick, release one side of the metal retaining clip on the fuel injector electrical connectors as shown below, then unplug the fuel injector. You only have to release one side of the metal clip. Continue unplugging all four fuel injectors on the left side of the engine. Repeat on the right side fuel injectors.
- With the injectors unplugged, you can now remove the fuel rail and injectors from the engine. BE CAREFUL...the fuel rail is still full of a good amount of gasoline. Thoroughly empty the fuel out of the rail into a bucket to avoid making a mess.
- Place the fuel rail on a clean bench. Using a metal pick or flat-blade screwdriver, remove the metal retaining clip from the first fuel injector. Grasp the injector, and while slowly turning back and forth, pull the injector out of the rail. Use a metal pick to remove the fuel injector oring from the fuel rail.
- Unpack a new fuel injector. Confirm there is a fresh o-ring installed on it.
- Install a new fuel injector into the fuel rail. Make sure the fuel injector is fully seated, then reinstall the metal retaining clip. Make sure the metal clip is correctly seated in the grooves of the injector.
- Repeat for the rest of the fuel injectors.
- Reinstall the fuel rail following the above steps in reverse. DO NOT FORGET TO CONNECT THE FUEL LINE!
BMW E9x M3 Fuel Injector Replacement Finished