328i bang from rear end

CME90 · 12-31-2014, 05:40 PM

Hi everyone new to the forum hear I recently purchased an 08 red 328i for 6 grand the thing is it has a 147k and when I put the car in reverse and back up a little the rear makes a bang noise like I've gone over a pot hole but if I back up slowly and use the brake its not noticable could any of you give a suggestion on what it could be thanks in advance and happy new year!!

Brian_TII · 01-01-2015, 02:38 PM

Depending on how / the exact timing of it but I'd look at the rear differential mount. Also sometimes brake pads can move a bit in their mounts when going from fwd to backward... But again really hard to say without seeing/ hearing it.

Meeni · 01-01-2015, 09:00 PM

Bang or clunk ? A clunk is the pads moving in the calipers, it's normal.

12-31-2014, 05:40 PM	#1
CME90 New Member 0 Rep 14 Posts Drives: 2008 328i Sedan Join Date: Dec 2014 Location: Charlotte, NC iTrader: (0)	328i bang from rear end Hi everyone new to the forum hear I recently purchased an 08 red 328i for 6 grand the thing is it has a 147k and when I put the car in reverse and back up a little the rear makes a bang noise like I've gone over a pot hole but if I back up slowly and use the brake its not noticable could any of you give a suggestion on what it could be thanks in advance and happy new year!!
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01-01-2015, 02:38 PM	#2
Brian_TII Second Lieutenant 8 Rep 229 Posts Drives: 06 e90 330i 6spd Join Date: Aug 2010 Location: Atlanta, GA iTrader: (0)	Depending on how / the exact timing of it but I'd look at the rear differential mount. Also sometimes brake pads can move a bit in their mounts when going from fwd to backward... But again really hard to say without seeing/ hearing it.
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01-01-2015, 09:00 PM	#3
Meeni Gateropode 329 Rep 2,848 Posts Drives: BMW 330i 06 Join Date: Apr 2012 Location: TN iTrader: (0)	Bang or clunk ? A clunk is the pads moving in the calipers, it's normal.
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