The problem: Timing chains on N63 engines have been found to stretch and wear out prematurely, resulting in premature valvetrain wear and reduced engine performance. Corrective action: BMW has come up ...

The answer to the question about how long timing chains last and whether they need to be replaced has two possible answers. It all depends on your answer to this question: Do you maintain your car ...

What Does the Timing Belt or Timing Chain Do? On a conventional piston engine — which is found in virtually all modern passenger cars — the up-and-down motion of the pistons turn the crankshaft, and ...

I have a 2007 plate BMW 120d SE, which I bought from a dealership 15 months ago. It has 67,000 on the clock and always been in the dealer network for work and servicing. However, the timing chain has ...

BMW's turbocharged four-cylinder engines of the mid-2010s have developed a reputation for unreliability. That reputation comes from a number of different problems, the biggest of which—brittle plastic ...