BMW 3 Series E90 — Reliability

E90 2007–2012 1 engine

Reliability Summary

Engine N43 — 54/100 CAUTION
Known Issues 7

Engine in this model

CAUTION 54

N43

N43 1.6/2.0 DI NA I4

Direct-injection, naturally aspirated four (116i-120i, 316i-320i, 520i). The big risk is the timing ...

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Known Issues Across All Engines

Issue Engine Severity Onset
Timing chain stretch and guide breakage — major engine damage N43 critical —
Direct injector failure and coking N43 high —
High-pressure fuel pump failure N43 high 90,000 km
NOx sensor failure N43 moderate —
Ignition coil failure (2007-2008 cars, service action) N43 minor —
Oil leaks — valve cover / crankcase ventilation, vacuum pump N43 minor 70,000 km
VANOS solenoid failure N43 minor —