A practical BMW ownership guide: oil change intervals, the usual leaks and cooling parts, what to budget for, and questions to ask an independent BMW shop.
BMWs are great to drive and honestly not that scary to own, as long as you stay ahead of a short list of known stuff. Most of the horror stories come from cars that skipped maintenance for a few owners in a row.
Oil changes
BMW's computer (Condition Based Service) will often let the oil go 10,000 miles or more. A lot of independent BMW techs recommend changing it sooner, more like every 5,000 to 7,500 miles, especially on turbo engines and cars that see short trips or mountain driving. It's cheap insurance. Use an oil that meets BMW's approval spec for your engine, not just the right viscosity.
The usual suspects
- Oil leaks. Valve cover gasket, oil filter housing gasket and oil pan gasket. Rubber gaskets harden with heat. See our valve cover and oil filter housing guides.
- Cooling system. Plastic expansion tanks, hoses and fittings get brittle, and many 6-cylinder cars use an electric water pump that fails with little warning.
- Fuel system on the turbo sixes. The N54 especially is known for high-pressure fuel pump and injector trouble.
- Timing chains on some 4-cylinder engines (the N20 and N47 diesel have known chain guide issues).
- Suspension bushings and control arms, which wear faster on rough roads and potholes. Front Range spring potholes count.
Fluids people forget
Brake fluid every two years or so (BMW tracks it by time). Coolant eventually, with BMW's spec coolant. Transmission fluid: BMW calls a lot of it "lifetime," but many indie shops suggest a change somewhere around 60k to 80k miles on the ZF automatics. Ask your shop what they recommend for yours.
Questions for an independent BMW shop
- Do you have BMW-level diagnostic software (ISTA or equivalent)?
- What parts brands do you use? OE suppliers like the original pump or gasket makers are often the same part as BMW's box, for less.
- Will you reset the service indicators and register a new battery if you replace it? (BMWs need the battery registered.)
- Can you show me the leak or the worn part?