I've had them on my Tesla M3 for about two months now and they do a great job keeping dirt and mud off the underside of the car behind the wheels. These fenders appear to be made from high quality vinyl and perfectly match the profile of the Tesla M3 wheel arch. The instructions were good but I watched a few YouTube videos that helped me a lot. I recommend doing this before installing. No drilling is required for installation. Fenders are held in place with existing pressure clip holes in the wheel arch behind each tire. New, longer pressure clamps are included. I started with the rear guard; There was a slight alignment issue on the rear passenger side that could be fixed with a little extra effort. The bottom of the rear fender is also held in place by a screw under the rear fender. The top part of the cover snaps onto the wheel arch. The manufacturer recommends using double sided tape (supplied) to support the top of each front guard. I found the top of the front guard attached to the wheel just as well as the rear guard and didn't require the use of double sided tape. It took me (79 year old male) about twenty minutes to install all four flaps. You look great and I'm a happy backpacker now.
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