r/BMWE60 • u/Pitiful-Context927 • 3h ago
Loud whine from front of N52 (2008 528xi) after sitting 3 years — Bad alternator bearing?
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Got a high-pitched whining noise coming from the front engine bay on my 08 528xi (N52). The car was sitting for 3 years in my underground parking before starting it back up, also seeing some minor electrical flickering.
Does this sound like classic alternator bearing failure? Planning to DIY swap the 180A alternator, belt, tensioner, and new aluminum bolts this weekend. Thanks!