Mercedes-Benz C-Class W203 — Reliability

W203 2002–2007 1 engine

Reliability Summary

Engine M271 Kompressor — 35/100 AVOID
Known Issues 6

Engine in this model

AVOID 35

M271 Kompressor

1.8L Kompressor I4

Supercharged M271. Simplex timing chain stretches and can skip before 100,000 km, plus supercharger ...

View details →

Known Issues Across All Engines

Issue Engine Severity Onset
Single-row timing chain stretch — catastrophic M271 Kompressor critical 60,000 km – 150,000 km
Balance-shaft plastic sprocket wear (pre-2010) M271 Kompressor high —
Supercharger clutch / belt failure M271 Kompressor high 80,000 km – 150,000 km
Valve cover gasket oil leak M271 Kompressor moderate 80,000 km – 150,000 km
Camshaft sensor magnets leak oil into wiring harness and ECU M271 Kompressor moderate —
Part-load crankcase breather hoses crack M271 Kompressor minor —