Thread: Rough idle on cold motor, after replacing start motor and valve cover
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      07-17-2025, 12:23 PM   #5
ChiltiCoatl89
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Drives: 2016 F10 BMW 535i M Sport
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2016 BMW 535i M Sport  [7.60]
For the first code, 120408, check all air intake plumbing for cracks or leaks. Check your MAF sensor on the charge pipe, and The other sensor thats nestled above and behind your Air Intake box, check connections.
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