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BMW 3 Series (F30)

BMW · 3-SERIES · F30

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Reliability snapshot

The F30 generation (2012–2019) moved the 3 Series almost entirely to turbocharged engines. The most discussed issue affects the early N20/N26 four-cylinder turbo: its timing chain and guides can wear prematurely on earlier production, so chain rattle warrants prompt inspection (later B48 engines addressed this). Across the range, oil-filter-housing-gasket and valve-cover leaks are common, as are cooling-system components and, on higher-power cars, the charge pipe. The six-cylinder N55 and later B58 are strong engines; overall the F30 is reliable when the early N20 chain concern is checked and routine cooling and gasket items are maintained.

Top problems on the F30

Most expensive and most frequently reported issues — ordered by repair cost

  • Caution — monitor closelyCooling-system component wear
  • Avoid long tripsEarly N20/N26 timing-chain wear
  • Caution — monitor closelyOil-filter-housing gasket leaks

Engines and trims

F30 production variants

B48 2.0 turbo inline-4
2.0L I4 Turbo
Modular turbo four; addressed the earlier N20 chain issue.
2.0L diesel (N47)
2.0L petrol (B48)
3.0L petrol (B58)
3.0L petrol (N55)
N20 2.0 turbo inline-4
2.0L I4 Turbo
Turbo direct-injection four; early production has a known timing-chain concern.
2.0L petrol (N20)
N55 3.0 turbo inline-6
3.0L I6 Turbo
Single-turbo direct-injection six.

Maintenance overview

Key service intervals (varies by engine and driving conditions)

Service itemIntervalTypical 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
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