BMW M3 E46 — Reliability

E46 2000–2006 1 engine

Reliability Summary

Engine S50/S54 — 72/100 ACCEPTABLE
Known Issues 3

Engine in this model

ACCEPTABLE 72

S50/S54

S50/S54 3.0-3.2 M Straight-Six

BMW M's high-revving naturally aspirated straight-sixes: the S50 (3.0 and 3.2) in the European E36 M...

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Known Issues Across All Engines

Issue Engine Severity Onset
Connecting-rod bearing wear and failure (S54) S50/S54 critical 97,000 km – 161,000 km
VANOS faults: solenoids, sprocket bolts, exhaust cam hub, oil line, seals S50/S54 high 97,000 km – 161,000 km
Cooling system wear: water pump, expansion tank, thermostat housing S50/S54 moderate 97,000 km – 193,000 km