Bearing noise.

richard_tricky · 07-17-2022, 02:17 AM

Hiya I know this is gointo be difficult but any advice would be appreciated.

I've started noticing this droning noise on my 2007 e90 335d uk.

It seems to be noticeable at around 70mph. I've tried the usual things such as turning the car left and right at speed to see if i can narrow it down.

Unfortunately the noise doesn't seem.to change when I do this. It's a constant noise that increases depending on speed.

I'm starting to think either the prop shaft bearing, maybe diff or gearbox.

How would.i go about narrowing down the source of the problem?

Do the wheel bearing on the rear make noises depending on the loading? I've changed the fronts in frustration.

Thanks

Phil325i · 07-17-2022, 03:32 AM

Could be diff noise. Have you ever changed the fluid? According to BMW it's covered by their 'lifetime fill' nonsense...

richard_tricky · 07-17-2022, 03:34 AM

Yes did the diff and gearbox about 4 years ago using genuine fluid.

All have been fine for
Years

07-17-2022, 02:17 AM	#1
richard_tricky Private First Class 16 Rep 140 Posts Drives: 335d Join Date: Feb 2013 Location: Wales iTrader: (0)	Bearing noise. Hiya I know this is gointo be difficult but any advice would be appreciated. I've started noticing this droning noise on my 2007 e90 335d uk. It seems to be noticeable at around 70mph. I've tried the usual things such as turning the car left and right at speed to see if i can narrow it down. Unfortunately the noise doesn't seem.to change when I do this. It's a constant noise that increases depending on speed. I'm starting to think either the prop shaft bearing, maybe diff or gearbox. How would.i go about narrowing down the source of the problem? Do the wheel bearing on the rear make noises depending on the loading? I've changed the fronts in frustration. Thanks
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07-17-2022, 03:32 AM	#2
Phil325i Brigadier General 615 Rep 3,194 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Could be diff noise. Have you ever changed the fluid? According to BMW it's covered by their 'lifetime fill' nonsense... __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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07-17-2022, 03:34 AM	#3
richard_tricky Private First Class 16 Rep 140 Posts Drives: 335d Join Date: Feb 2013 Location: Wales iTrader: (0)	Yes did the diff and gearbox about 4 years ago using genuine fluid. All have been fine for Years
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