I couldn't pinpoint it, but then I didn't really try. I was already committed to replacing the body mounts because the visible rubber was hard and cracked. And then replacing this one fixed the squeak, so I got lucky.
Whenever I hit a sharp bump with the rear wheels, I would get a sequence of a few short squeaks. Sounded like something was making noise while moving back and forth a little bit. The sound was definitely coming from the back, and seemed to be from something inside the cab. I suppose rubbing the outside of the body is close enough to sound like that.
If you don't want to buy new body mounts just to see if they help, you could lift up your tub and put some silicone spray on each of the mounts near where you're hearing the squeak and see if that makes a difference. Pick a light lubricant that will eventually dry out and that won't harm rubber or painted surfaces, and maybe hit them one by one to see if it helps.
Yea I’m pretty sure I need new body mounts too...
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2005 RHD TJ Sport
2010 BMW 528xi








