I recently noticed my BMW 4 Series engine is making a rattling noise. It seems to happen more often when the car is idling, but sometimes I can hear it while driving. What could be causing this noise and is it something I should be concerned about?
ReplyIt's possible that your engine is experiencing a malfunction with the timing chain or tensioners. This can cause a rattling noise and should be addressed by a mechanic as soon as possible.
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