One problem related to engine exhaust system has been reported for the 2008 BMW 535. The most recently reported issues are listed below.
Engine losses power while driving on highway, engine malfunction light comes on with warnings of engine reduced power. Took it to BMW fremont, they found the vanos solenoid valves exhaust faulty, replaced both solenoids and performed an oil service with fuel injection/induction service. This time BMW na paid 85% of the bill as a one time goodwill!.