BMW M4 F82/F83 Engines — The Complete UK Guide

Affected models:

F82/F83 M4 all variants (2014–2020) with S55 engine.

Typical failure mileage:

30,000–80,000 miles (more common on tuned cars).

Root cause:

The S55's crank hub can spin on the crankshaft under high stress -a well‑documented issue on S55 engines. This causes timing to slip, leading to catastrophic engine damage if not addressed. The issue is more common on tuned cars and those tracked regularly.

Affected models:

F82/F83 M4 all variants (2014–2020) with S55 engine.

Typical failure mileage:

50,000–100,000 miles (more common on tracked cars).

Root cause:

While the S55 bottom end is generally reliable, rod bearing wear can still be an issue -particularly with extended high‑rpm use or poor maintenance intervals. Excessive wear can eventually lead to engine failure.

Affected models:

F82/F83 M4 all variants (2014–2020) with S55 engine.

Typical failure mileage:

30,000–80,000 miles.

Root cause:

The S55's factory plastic charge pipes can crack under high boost pressures or in extreme temperatures -leading to boost leaks, reduced power, and engine warning lights.

Affected models:

F82/F83 M4 all variants (2014–2020) with S55 engine.

Typical failure mileage:

40,000–80,000 miles.

Root cause:

The S55's factory intercooler can develop internal cracks, injecting coolant into the intake and cylinders -causing misfires, coolant loss, and potential engine damage.

Affected models:

F82/F83 M4 with 7‑speed M‑DCT (2014–2020).

Typical failure mileage:

40,000–80,000 miles.

Root cause:

The 7‑speed dual‑clutch transmission is generally strong, but aggressive shifting and track use can lead to accelerated wear, overheated fluid, and poor shifts.