BMW Oil Leak Repair
Almost every BMW leaks oil eventually. The question is where it's coming from, and whether it's dripping somewhere it can do real damage.
Which cars are affected
- N52 six-cylinder: 128i, 328i, 528i, X3, Z4 (2006 to 2015)
- N54 and N55 turbo six: 135i, 335i, 535i, 435i, M235i, X3/X4 35i, 1M, M2 (2007 to 2018)
- N20 and N26 four-cylinder: 228i, 328i, 428i, 528i, X1, X3 28i (2012 to 2016)
- B58 and B48: 340i, 440i, M340i, 330i, 530i, X3, X5 (2016 and newer)
- N63 V8: 550i, 650i, 750i, X5/X6 50i
Symptoms to watch for
- Burning oil smell after a drive, or light smoke from under the hood
- Oil spots under the car, or a wet, dirty oil film on the engine
- Oil level dropping between services
- Squealing belt or a belt that looks oily
- Oil on the exhaust manifold or turbo heat shields
Where BMWs usually leak
Oil filter housing gasket. The most common BMW leak. The gasket sits on top of the engine and hardens with heat. On N52, N54, N55 and N20 engines the leaking oil runs down onto the serpentine belt.
Valve cover and gasket. On many newer engines the PCV system is built into a plastic valve cover, so a cracked cover or failed PCV diaphragm means replacing the cover, not just the gasket.
Oil pan gasket. Slow to show up, and on some all-wheel-drive models the front subframe has to be lowered to reach it. We quote it accurately before starting.
Turbo oil lines and other seals. On N54 and N55 engines the turbo feed and return lines can seep. Other sources include the front crank seal and the vacuum pump.
Why you shouldn't wait
Most oil leaks start slow, but some are dangerous. Oil from a leaking filter housing gasket softens the serpentine belt. A worn belt can come apart, and on some engines the pieces can get pulled behind the front crank seal and cause serious engine damage. Oil dripping onto a hot exhaust or turbo is also a fire risk. Fixing the gasket early is far cheaper than the damage it can cause.
How we fix it
We clean the area, find the actual source (often with UV dye), and show you photos of what we found. Repairs use genuine BMW or OE-supplier gaskets. When we're already in an area, we'll point out related parts that are cheaper to replace at the same time, like the belt after an oil filter housing leak, and you decide.
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Request a call back
Leave your number and we'll call you back during shop hours. Add your VIN and we can look up your car before we call.
Common questions
Is it safe to drive with an oil leak?
Short term it depends on where it's leaking. A slow valve cover seep is usually not urgent; oil on the belt or the exhaust is. Bring it in and we'll tell you which one you have.
Why does my BMW smell like burning oil?
Usually oil dripping onto a hot exhaust part, most often from the valve cover gasket or oil filter housing gasket.
Do you use genuine BMW gaskets?
Yes. We use genuine BMW or OE-supplier gaskets (the same companies that make them for BMW), never generic parts.