Start with the engine, not just the badge. BMW 3 Series procedures differ across E46, E90/E91 and later generations. The same sales badge can refer to different engines and equipment.
Spark plugs and ignition
- How To Change Your BMW M54 Spark plugs at home — M54 overview; check the specific chassis and coil style.
- Change Your BMW B46 B48 Spark plugs at home — B46/B48 examples, including the 2019 G20 330i.
- How To Change Your BMW N51 N52 Spark plugs at home — N51/N52 coverage.
- How To Change Your BMW N20 N26 Spark plugs at home — N20/N26 coverage.
- How to Replace Ignition Coils and Spark Plugs on a 2003–2005 BMW 330i 3.0L M54 — 2003–2005 330i 3.0L M54.
Other repairs
- How to Replace a BMW E46 Fuel Pump — 1999–2006 M52TU/M54
- Starter Replacement: 2007–2011 BMW 328i 3.0L N52K (Through 03/2011)
- Front Driver Window Regulator Replacement — 1999–2005 BMW E46 Sedan / Wagon
- Rear Passenger Window Regulator Replacement — 2006–2012 BMW E90/E91 Sedan / Wagon
Engine light or rough idle?
Record your codes and symptoms before replacing components. Read the check-engine-light guide, then use the matching repair instructions.