3 Series E90
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Which Bmw 3 Series E90 engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Bmw 3 Series E90 engine is the most reliable?
320i / 325i 2.5 (N52) — Reliable verdict. The naturally-aspirated straight-six — one of BMW's most dependable modern engines, smooth and long-lived. The known weak points are wear items rather than design killers: electric water pump, plastic thermostat housing and a couple of oil-leak gaskets.
Which Bmw 3 Series E90 engines should you avoid?
Engines with the weakest reliability verdicts: 325i / 330i 3.0 (N53, direct injection), 316i / 318i / 320i 2.0 (N43), 116d / 118d / 120d (N47, 2007–2011), 335i 3.0 Twin Turbo (N54).
What are the most common Bmw 3 Series E90 problems?
The most commonly reported problems across all Bmw 3 Series E90 generations and engines: Swirl flap failure, Electric water pump failure, Electric water pump and thermostat failure, Valvetronic eccentric shaft sensor and oil leaks, Timing chain stretch.