Smart ForFour W454 — Reliability

W454 2004–2006 1 engine

Reliability Summary

Engine M134 E11 / 3A91 — 84/100 BUY
Known Issues 2

Engine in this model

BUY 84

M134 E11 / 3A91

M134 1.1 / Mitsubishi 3A91

Mitsubishi 1.1 three-cylinder petrol (3A91, 75 hp), called M134 by Mercedes: Smart Forfour 454 1.1 (...

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Known Issues Across All Engines

Issue Engine Severity Onset
Timing chain stretch M134 E11 / 3A91 moderate 150,000 km
Oil consumption - thin piston rings M134 E11 / 3A91 moderate 100,000 km