exhaust smell in cabin of my 2011 BMW 328i

[aaronb3]

I have an automatic transmission E90 (with around 130,000 miles) and have experienced a lingering smell of exhaust in the cabin. I am taking the car in on Friday to my local dealership. Anyone know what the range of expenses could be? I assume there is a leak in the exhaust system near the engine cylinders. Thanks!

[bmwdirtracer]

I'd bet that your engine is leaking oil, most likely from the valvecover gasket.

5 hours labor, gasket set maybe $100, total, oh $600-750. Probably a good idea to add a set of spark plugs; they're basic maintenance every ~50k miles.