Mine has been problem free and solid.
I lost a tow hook cover in a car wash but that's it, no rattles, no squeaks, couldn't be happier other than the gas mileage which i knew would stink.
The tow hook cover was $15 which is rediculous but that's it.

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Porsche 996 Turbo (Ruf 550)
Porsche 993 Cab.
Porsche 997 GT3
Audi A8
BMW X5 4.8 White, Black Napa, Sport, Technology, Premium, Prem. Sound, Cold Weather, Rear Climate, Multi-Contour, Sirius, HD Radio, Running Bds., Bamboo