335i 3.0 Twin Turbo (N54)
2006–2010 · petrol · 2979cc · 306hp
Engine codes: N54
Reliability, common problems and owner reviews for the Bmw 3 Series E90 335i 3.0 Twin Turbo (N54). Check this before you buy used.
Hugely strong and tunable twin-turbo six, but maintenance-hungry and expensive. The high-pressure fuel pump failed so often BMW extended its warranty; turbos (wastegate rattle), injectors and carbon are all known costs. A brilliant engine for someone with budget and discipline; a trap for a bargain-hunter.
Known Issues
High-pressure fuel pump failure was widespread — BMW issued an extended warranty. Causes limp mode / stalling.
Fix / Workaround: Replace HPFP (check if done under the campaign).
Repair cost: €400–€900
Typically appears after: 80,000 km
Original turbos develop wastegate rattle and can fail.
Fix / Workaround: Rebuild/replace turbos.
Repair cost: €1000–€3000
Typically appears after: 120,000 km
DI injectors fail; carbon builds on intake valves.
Fix / Workaround: Replace injectors; walnut blast.
Repair cost: €300–€1200
Mileage Thresholds
After 100,000 km: HPFP, turbo, injector costs cluster.
Pre-Purchase Checklist
- ☐Confirm HPFP replacement history
- ☐Listen for turbo wastegate rattle
- ☐Establish tuning history
- ☐Budget for high running costs
Frequently asked questions
Is the Bmw 3 Series E90 335i 3.0 Twin Turbo (N54) reliable?
Problematic — Hugely strong and tunable twin-turbo six, but maintenance-hungry and expensive. The high-pressure fuel pump failed so often BMW extended its warranty; turbos (wastegate rattle), injectors and carbon are all known costs. A brilliant engine for someone with budget and discipline; a trap for a bargain-hunter.
What are the common problems and reviews for the Bmw 3 Series E90 335i 3.0 Twin Turbo (N54)?
The most commonly reported problems: HPFP failure, Turbo wastegate rattle, Injectors / carbon.
Is a used Bmw 3 Series E90 335i 3.0 Twin Turbo (N54) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.