BMW 1 Series (F20)
BMW · 1-SERIES · F20
Verified1 source
1 source
- Editorial sourceeditorial
Reliability snapshot
The F20/F21 1 Series continued the rear-wheel-drive layout with turbocharged engines. Common items are the early N20 petrol timing chain and the N47/B47 diesel timing chain on earlier production, plus the oil-filter-housing gasket and cooling components. The later B-series engines (B48, B58, B47) improved on these concerns. The F20 is dependable when the timing-chain history of the specific engine is checked.
Top problems on the F20
Most expensive and most frequently reported issues — ordered by repair cost
- Caution — monitor closelyOil-filter-housing gasket leaks
- Avoid long tripsEarly N20/N26 timing-chain wear
Engines and trims
F20 production variants
3.0L petrol (B58)
B48 2.0 turbo inline-4
2.0L I4 Turbo
Modular turbo four; resolved the earlier N20 chain issue.
2.0L petrol (B48)
2.0L diesel (N47)
2.0L diesel (B47)
N47 2.0 diesel
2.0L I4 Diesel
Common-rail diesel; rear timing chain is a known failure point.
N20 2.0 turbo inline-4
2.0L I4 Turbo
Turbo four; early production has a known timing-chain concern.
3.0L petrol (N55)
2.0L petrol (N20)
Maintenance overview
Key service intervals (varies by engine and driving conditions)
| Service item | Interval | Typical cost |
|---|---|---|
| Early timing-chain check Inspect on early-production N20/N47 cars | ||
| Engine oil and filter Per BMW's Condition Based Service schedule | 12,000–15,000 km | |
| Cooling-system refresh Preventive — or sooner by vehicle age | 120,000–150,000 km |