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Discussion Starter · #1 ·
Recently got a e87 130i, and there’s some kind of rear end rattle doesn’t do it all the time but at low revs under load almost sounds like heat shields are rattling. Once up to speed cannot replicate it. It’s got a performance back box on it, but can’t imagine it’s the valve sticking as cold starts are louder and I can hear it come off cold start before driving.
Anyone had anything similar?
 

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Easiest way to tell would be to get under it and give the heatshields a poke. You can see quite a bit just laying behind the car.

The heatshield above the exhaust/header joint is known to droop because the little pressed steel nuts holding it up are exposed to heat from the cats and spray from the road. Because of how well isolated that area is, the noise sounds like it’s coming from further back than it is. Need the car in the air to check that though :(
 
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