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BMW F82 M4 coupe and convertible common problems

2015–2020 · M4 (incl. Competition, GTS, CS) (S55). The known weak spots of the engines used in the F82, with sources, plus the topics that come up most in BMW's service bulletins and NHTSA recalls for this chassis.

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S55 engine

M4 (incl. Competition, GTS, CS) (2015–2020) · S55 bulletins →

Crank hub slip

The S55's friction-fit crankshaft hub can rotate under big torque spikes (especially on tuned cars), knocking timing out. Upgraded keyed or pinned hubs are the common fix.

BMW bulletins on file for the F82:

Sources: Litchfield: F8x crank hub issue · Lang Racing: S55 crank hub

Charge pipe cracks

The factory plastic charge pipes crack, causing boost leaks and limp mode.

Sources: Lang Racing: S55 crank hub and boost notes

Most frequent bulletin topics 169 bulletins

BMW service bulletins and warranty extensions filed with NHTSA that list the F82, grouped by topic. A bulletin tells technicians how to diagnose and fix a known issue; it doesn't mean every car has the problem.

NHTSA recalls by component 9

Matched from NHTSA's public recall file by model and model year. Recall repairs are free; check a VIN.

BMW warranty extensions that list the F82

If a car qualifies, the listed repair may be free. Check eligibility for the VIN with a BMW center.

Sources: BMW service bulletins and recalls filed with NHTSA (public data) and the specialist and owner write-ups linked above. Not affiliated with BMW.

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