I've had the Weathertech in my last 4 cars, and just got one for my new-to-me '04 4.4. I've hauled gravel, mulch, brick pavers and reac car wheels and tires and have yet to damage a Weathertech. But I have an advantage- I live 20 minutes from their HQ here in IL so I can just go in and pick one up.

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'04 E53, 4.4 Sport
'97 E39 528i
'86 911 Carrera, track car
'96 BMW R1100R