Originally Posted by
Dobboy
If this is just recent i'd be inclined to change the tensioner and oil only, before spending big money.
Mine went on my R53 not long after I bought it, I think it was probably because the oil was a bit low tbh.
The longest part of the job is jacking the car up and getting the wheel off, and the tensioner part itself (the bit that fills up with oil) is only £30 odd quid from BMW.
The chain won't snap, but if you kick it's head in the chain could skip a tooth on the crank sprocket because the chain is slacker than it should be.... then it's curtains.
Job is a doddle with a short wobble bar type socket set; it's one bolt/hex you need to loosen/tighten.