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Spark Plug Replacement – BMW N20 Turbo 4-Cylinder Engine
This repair procedure gives step by step instructions on installing new spark plugs in the BMW N20 turbocharged 4-cylinder engine. We recommend the spark plugs be replaced in the N20 engine every 60,000 miles to keep it running at peak performance. Please click on the button below to see all BMW models that this repair applies to.
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Possible Symptoms: Rough idle, poor performance, engine stalls
This repair can be used on the following BMW models:
Advanced level repair.
Step 1 - Purchase Parts
You will need the following parts and supplies to perform this repair.
Step 2 - Repair Procedure
Unless otherwise noted, all vehicle repair step images in this article are copyrighted, and used courtesy of BMW of North America, Inc. .
1. Removing and installing spark plugs.
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Avoid "dropping" the spark plug into the tube when reinstalling a fresh one. This can throw off the gap at the end of the plug causing your engine to run rough!