Just came back from test driving an 07 X3 and noted that the drivers door sounded very tinny and hollow (very Toyota-like) when we closed it and knocked on it. Really like a tin can. All the other doors sounded fine. The Car-Fax checked out w/o any accidents. Anyone have any thoughts on this?

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08 BMW X5 4.8i - GONE after 6.5 yrs
Space Gray / Light Beige
Premium, Sport, 20's, Technology
SAT, Rear Climate,Heated