Vehicles affected by service bulletin: The problem: Timing chains on N63 engines have been found to stretch and wear out prematurely, resulting in premature valvetrain wear and reduced engine ...

You should have the B47 engine fitted to your car (which replaced the notorious N47 which had all the problems with the chain). We would check to see what engine you have fitted as if you have the N47 ...

A close look at the timing chain guide failure common to BMW V8 engines, examined through a 2001 BMW 740i Sport and why this issue causes serious long-term damage.