BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) - 128i Engine (N52), Exhaust and Drivetrain Modifications https://www.1addicts.com/forums/ Technical talk specifically related to the naturally aspirated engine, exhaust and drivetrain in the 128i en Mon, 27 Apr 2026 13:18:51 GMT vBulletin 60 https://www.1addicts.com/forums/images/misc/rss.jpg BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) - 128i Engine (N52), Exhaust and Drivetrain Modifications https://www.1addicts.com/forums/ N52B30 Whining noise at high RPM https://www.1addicts.com/forums/showthread.php?t=2237290&goto=newpost Mon, 13 Apr 2026 16:58:58 GMT E82 2010 128i, N52B30, 6MT, 106k miles

I've had a whining noise i'm trying to track down. Its been there since ive had the car (78k miles), but has become very noticeable ever since I mic'ed up my engine bay to record. It is proportional to RPM, not noticeable at idle. It also seems to lag a bit picking back up when revs drop between shifts

Video:
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Is this noise normal in the N52 or indicative of something on its way out?

I suspect alternator or power steering pump, but I'm trying to triangulate before dropping a bunch of money on parts. Will eventually have to replace all my drive belt components but want to prioritize where this noise is coming from. Anyone have any advice? ]]> 128i Engine (N52), Exhaust and Drivetrain Modifications thevihiman https://www.1addicts.com/forums/showthread.php?t=2237290