Smart ForFour W454 — Reliability

W454 2014–2006 1 engine

Reliability Summary

Engine M135 1.3/1.5 — 72/100 ACCEPTABLE
Known Issues 2

Engine in this model

ACCEPTABLE 72

M135 1.3/1.5

M135 1.3/1.5 (3A9-series)

ForTwo/ForFour 453. Mitsubishi 3A9 engine (Mirage/Space Star). NA 1.0 (71hp) and 1.3 (109hp). Brabus...

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Known Issues Across All Engines

Issue Engine Severity Onset
CVT jerkiness (ForTwo) M135 1.3/1.5 moderate 40,000 km – 100,000 km
Timing chain tensioner wear M135 1.3/1.5 moderate 100,000 km – 180,000 km