325i / 330i 3.0 (N52)
2005–2011 · petrol · 2996cc · 272hp
Engine codes: N52
Reliability, common problems and owner reviews for the Bmw 3 Series E90 325i / 330i 3.0 (N52). Check this before you buy used.
The larger naturally-aspirated straight-six — strong, smooth and dependable like its 2.5 sibling. Same cooling-system and gasket wear items; no major design flaws. One of the best E90 engines to own.
Same engine, other cars
This is the same physical engine (N52) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Electric water pump fails with age.
Fix / Workaround: Replace proactively (pump + thermostat).
Repair cost: €300–€700
Typically appears after: 130,000 km
Valve cover / oil filter housing gaskets leak.
Fix / Workaround: Replace gaskets.
Repair cost: €150–€600
Mileage Thresholds
After 250,000 km: Long-lived with upkeep.
Pre-Purchase Checklist
- ☐Water pump history
- ☐Oil-leak inspection
- ☐Excellent choice
Frequently asked questions
Is the Bmw 3 Series E90 325i / 330i 3.0 (N52) reliable?
Reliable — The larger naturally-aspirated straight-six — strong, smooth and dependable like its 2.5 sibling. Same cooling-system and gasket wear items; no major design flaws. One of the best E90 engines to own.
What are the common problems and reviews for the Bmw 3 Series E90 325i / 330i 3.0 (N52)?
The most commonly reported problems: Electric water pump failure, Oil leaks (gaskets).
Is a used Bmw 3 Series E90 325i / 330i 3.0 (N52) worth buying?
Minor issues only, easy to maintain, no design flaws. A safe used buy.