I don't know anything about these cars and I just happened to come across a 91 318is on craigslist for 3000. Now I always hear about BMW parts and their prices, but after a quick google search all the basic parts are very cheap. Cheaper than sr20 parts at least. The car has 100k miles on the odometer and the exterior and interior are absolutely flawless. It is being sold by a dealership and I was just wondering if there are known problems for these types of cars and if there are some questions I need to ask.