325i / 330i 3.0 (N53, direct injection)
2007–2011 · petrol · 2996cc · 272hp
Engine codes: N53
Reliability, common problems and owner reviews for the Bmw 3 Series E90 325i / 330i 3.0 (N53, direct injection). Check this before you buy used.
The direct-injection straight-six that replaced the N52. Smooth, but it inherits the N43-style fuelling troubles: high-pressure fuel pump, injectors, coils and sensors all give grief. Less dependable than the port-injected N52 — prefer that if you can.
Known Issues
High-pressure fuel pump and DI injectors fail → rough running, limp mode.
Fix / Workaround: Replace HPFP / injectors as needed (costly).
Repair cost: €400–€1500
Typically appears after: 100,000 km
Coils and NOx/lambda sensors fail.
Fix / Workaround: Replace as needed.
Repair cost: €100–€500
Mileage Thresholds
After 120,000 km: Fuelling faults common.
Pre-Purchase Checklist
- ☐Scan for fuelling/misfire codes
- ☐Ask about HPFP/injector history
- ☐Prefer the N52 if possible
Frequently asked questions
Is the Bmw 3 Series E90 325i / 330i 3.0 (N53, direct injection) reliable?
Problematic — The direct-injection straight-six that replaced the N52. Smooth, but it inherits the N43-style fuelling troubles: high-pressure fuel pump, injectors, coils and sensors all give grief. Less dependable than the port-injected N52 — prefer that if you can.
What are the common problems and reviews for the Bmw 3 Series E90 325i / 330i 3.0 (N53, direct injection)?
The most commonly reported problems: HPFP / injector failure, Coil / sensor faults.
Is a used Bmw 3 Series E90 325i / 330i 3.0 (N53, direct injection) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.