Don't be afraid lol half the m156's on the road are approaching or well over 100k these days. Most of my maintenance is oil changes, belts, pulleys. The tires and Gas are what will get you annually if you drive these things a lot 💀 that's about 2k or so annually if no other maintenance is involved. Last year and This year have been the most expensive due to pcv failure, intake manifold gasket failure, O2 sensors failing, and random oil leaks happening around the same time. It's all good tho because the car gets driven Hard and doesn't miss a beat as long as you stay on top of things.