316i / 318i / 320i 2.0 (N43)
2007–2011 · petrol · 1995cc · 143hp
Engine codes: N43
Reliability, common problems and owner reviews for the Bmw 3 Series E90 316i / 318i / 320i 2.0 (N43). Check this before you buy used.
The direct-injection 4-cylinder petrol — widely flagged to avoid. Injectors, coils and sensors give recurring lean-running/misfire faults, and some needed replacing at low mileage. Choose a straight-six N52 instead.
Same engine, other cars
This is the same physical engine (N43) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
DI injectors, coils and lambda/NOx sensors cause persistent lean-running and misfire faults; some engines replaced early.
Fix / Workaround: Replace failed injectors/coils/sensors — can be repeated and costly.
Repair cost: €200–€1500
Typically appears after: 80,000 km
Carbon on intake valves.
Fix / Workaround: Walnut blast.
Repair cost: €150–€350
Typically appears after: 120,000 km
Mileage Thresholds
After 100,000 km: Injector/sensor faults common.
Pre-Purchase Checklist
- ☐Scan for lean/misfire codes
- ☐Ask about injector history
- ☐Strongly prefer the straight-six N52
Frequently asked questions
Is the Bmw 3 Series E90 316i / 318i / 320i 2.0 (N43) reliable?
Problematic — The direct-injection 4-cylinder petrol — widely flagged to avoid. Injectors, coils and sensors give recurring lean-running/misfire faults, and some needed replacing at low mileage. Choose a straight-six N52 instead.
What are the common problems and reviews for the Bmw 3 Series E90 316i / 318i / 320i 2.0 (N43)?
The most commonly reported problems: Injector / coil / sensor faults, Carbon build-up (DI).
Is a used Bmw 3 Series E90 316i / 318i / 320i 2.0 (N43) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.