The BMW 3 Series was introduced in 1975 and helped establish small executive cars as having good handling and interior quality. Over time it has improved performance but some issues can still arise. These issues include airbags deploying unintentionally due to a faulty switch, loss of braking from a loose pedal connection, overheating from cooling fan problems, suspension issues from loose ball bearings, fuel injection failures from pump bearing issues, and power steering failures from out-of-spec control modules. The document provides details on these potential problems that owners of BMW 3 Series cars should be aware of.