What exactly are you planning to do with it?
All Tesla expects anyone to do, is place/leave/remove a phone from the charging pad. How much wear and tear would you expect from those three actions?
It isn't none, but unless you smash your hand into it every time to put down or pick your phone, it should be "sufficient" for the life of the car.
On the flipside, let's ask this... how long have you had your M3? If you bought it new, then about 3 to 4 years, right? How have your seats held up? Little bit of surface wear, but mostly intact, right? That goes through a LOT more abuse than a charging pad.