BMW 335i E90 — Reliability

E90 Sedan Mid 2006–2011 2 engines

Reliability Summary

Best engine N55 — 76/100 ACCEPTABLE
Worst engine N54 — 32/100 AVOID
Average reliability 54/100

Engine Comparison

Engine Reliability Score Verdict Known Issues
N55
3.0L Turbo I6 		76/100 ACCEPTABLE Electric water pump failure +4
N54
3.0L Twin-Turbo I6 		32/100 AVOID High pressure fuel pump (HPFP) failure +3

Engines in this model

ACCEPTABLE 76

N55

3.0L Turbo I6

Fixed N54. Known issues cheap + documented. 200k+ km proven. Good tuning base.

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AVOID 32

N54

3.0L Twin-Turbo I6

Huge tuning potential ("European 2JZ"). Constant problems. Project car, not daily.

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Known Issues Across All Engines

Issue Engine Severity Onset
Electric water pump failure N55 high 60,000 km – 120,000 km
Valve cover gasket oil leak N55 moderate 60,000 km – 130,000 km
Oil filter housing gasket (OFHG) leak N55 moderate 60,000 km – 130,000 km
Plastic charge pipe crack N55 moderate 60,000 km – 150,000 km
Coolant pipe / banjo bolt seals N55 minor 80,000 km – 150,000 km
High pressure fuel pump (HPFP) failure N54 critical 30,000 km – 100,000 km
Turbocharger failure (one or both) N54 critical 100,000 km – 200,000 km
Piezoelectric injector failure (x6) N54 high 60,000 km – 150,000 km
Wastegate rattle / actuator failure N54 moderate 60,000 km – 150,000 km

FAQ

Is the BMW 335i reliable?

The BMW 335i has 2 engine options with reliability scores ranging from 32/100 (AVOID) to 76/100 (ACCEPTABLE). Average reliability: 54/100.

Which BMW 335i engine is most reliable?

The N55 is the most reliable engine in the BMW 335i, scoring 76/100 (ACCEPTABLE).

What problems does the BMW 335i have?

Across all engine variants, the BMW 335i has 9 known issues. The most common are related to Electric water pump failure, Valve cover gasket oil leak, Oil filter housing gasket (OFHG) leak.