I worked for a Stealership in Minnesota a few years back and the consensus is that the technology that BMW uses to align tires, and the weight distrubution of the car itself, counteracts any and all uneven wear of the tires. Although, if you are doing burnouts with an m5, a favorite of mine, your rear tires are clearly going to wear out fast then your fronts, Duh.

So no, as long as your tires looked normal, your good to go.

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2003 BMW X5 4.4 Jet Black exterior, black interior with dark brown poppel interior