Tin can rattle noise rear 2010 M3 coupe

[kpneverdies]

where do i get the SIB thing?

[Wagerd]

Hey guys, just went through my car trying to find what sounded like loose bolts rattling around in the passenger rear. It was the battery hold-down mechanism that had worked loose. Tightened it up, and all is good. Sounded like the whole rear end was coming apart on any bump. Hope that helps some of you!

[Mr. ///M3 RD]

Originally Posted by Wagerd

Hey guys, just went through my car trying to find what sounded like loose bolts rattling around in the passenger rear. It was the battery hold-down mechanism that had worked loose. Tightened it up, and all is good. Sounded like the whole rear end was coming apart on any bump. Hope that helps some of you!

Glad you found it, I always make sure noting is loose below the trunk floor cover tools are nearly wrapped in paper towels so that they do not make metal to metal contact. I check on this every time I wash my cars (most of the time that is on a weekly basis).

[DaveDee]

Originally Posted by footie

It's a small stone getting between the rear disc and the shield at the back of the rear disc. Mine suffered it a couple of times when I owned it and the only way I found of getting rid of it was to drive at about 50mph and make a few repeated emergency stops.

Try this and see if it helps.

Footie is right, I had exactly the same thing, drives you nuts as it's intermittent. At first I thought I had a cracked ceramic block in on one of the cats, really bad in a parking garage. A small stone will do it every time.
I had to have the rear wheel removed to have it fixed.

hope you had this fixed a long time ago, but worth a revisit in case anyone else get the same thing