I recently used Stuart's body shop (not for work on the X). They were great about working with the insurance company to do do a proper repair and include some other small stuff that I wanted. The paint match was excellent. They work with a lot of high end cars, especially Porsches--just in case you are interested in a second estimate.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas