BMW 2003 330 Xi Popping/thumping

DRJON1

MEMBER
2003 BMW 330
6 CYL
AWD
MANUAL
50,000 MILES

BMW 330Xi 2003. LOUD thumping/popping intermittently from back deck beyond rear seats near speakers even when sound system is OFF. Nothing visible from trunk

Friday, January 28th, 2011 AT 4:27 PM

5 Replies

DOCHAGERTY

MECHANIC
9,601 POSTS

Noise from the area you refer to could be 1) The center support bearing rubber isolation has degraded and the driveshaft should be inspected for same and repaired/replaced straightaway. 2) A subframe/differential rubber isolation mount failure. 3) Bad rear shock mounts. I strongly recommend you seek out someone to put the car up in the air on a lift and inspect it for the unsafe issues that I have just presented, you might want to tow it to your BMW service provider to accomplish the inspection, be safe, do not take chances.

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Friday, January 28th, 2011 AT 5:34 PM

DRJON1

MEMBER
3 POSTS

Thank you for the info. I think it sounds more like a sharp electrical popping than frame /differential/shocks. But I will see my repair guy ASAP.
Again thank you.

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Friday, January 28th, 2011 AT 5:38 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

My response may be a little over the top, but you can agree I'm sure, that noise can be different things to different people. Cyberspace has it's limitations.

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Friday, January 28th, 2011 AT 5:43 PM

DRJON1