Reliability Summary

Best engine N55 — 79/100 BUY
Worst engine S55 — 60/100 CAUTION
Average reliability 70/100

Engine Comparison

Engine Reliability Score Verdict Known Issues
N55
3.0L Turbo I6
79/100 BUY VANOS solenoids and VANOS housing bolts (recall 2010-2012) +8
S55
3.0L Twin-Turbo M I6
60/100 CAUTION Crank hub slip — timing jumps, possible bent valves +5

Engines in this model

Known Issues Across All Engines

Issue Engine Severity Onset
VANOS solenoids and VANOS housing bolts (recall 2010-2012) N55 moderate 97,000 km – 193,000 km
Valve cover gasket and PCV valve in the cover — oil leaks, oil consumption N55 moderate 97,000 km – 161,000 km
Oil filter housing gasket (OFHG) leak N55 moderate —
Intake valve carbon build-up (direct injection) N55 moderate 97,000 km – 129,000 km
Electric water pump failure N55 moderate 48,000 km – 160,000 km
High-pressure fuel pump failure — mainly 2010-2011 engines N55 moderate 80,000 km – 145,000 km
Turbo wastegate rattle N55 minor 97,000 km – 193,000 km
Coolant pipe / banjo bolt seals N55 minor 80,000 km – 150,000 km
Plastic charge pipe crack N55 minor 80,000 km – 161,000 km
Crank hub slip — timing jumps, possible bent valves S55 critical —
Rod bearing wear — frequency disputed S55 critical 97,000 km – 129,000 km
Fuel injector damping component missing — fuel leak, fire risk (recall 20V-666) S55 moderate —

FAQ

Is the BMW M2 reliable?

The BMW M2 has 2 engine options with reliability scores ranging from 60/100 (CAUTION) to 79/100 (BUY). Average reliability: 70/100.

Which BMW M2 engine is most reliable?

The N55 is the most reliable engine in the BMW M2, scoring 79/100 (BUY).

What problems does the BMW M2 have?

Across all engine variants, the BMW M2 has 15 known issues. The most common are related to VANOS solenoids and VANOS housing bolts (recall 2010-2012), Valve cover gasket and PCV valve in the cover — oil leaks, oil consumption, Oil filter housing gasket (OFHG) leak.