I just bought a 2015 428i xdrive gran coupe. It's been certified and had no issues. But I am curious as to what this sound is. It starts when I turn the car off after coming home. It sounds like it is originating from the rear left wheel.
https://clyp.it/wn0qnmo3?token=7539e...ee6d646b45b6ca
Might be metal cooling/expansion/contraction, but it's a bit odd for that.
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