The company said April 11 that a recall started in China this month has now been extended worldwide, affecting 489,000 vehicles – including 156,000 in the United States.
BMW says that in rare cases one of four bolts holding the cover on the engine’s variable camshaft timing system breaks, which can then cause other bolts to fail.
That means oil begins leaking from the unit, causing the timing system to become sluggish. It can eventually lead to complete engine failure.
The company says customers will be notified whether their models are affected. The company said the repair takes a few hours at most.