Rest easy... the oem mazdas use heavy duty 3m adhesive tape, in addition to clips.... (3 clips for the front visors and 2 clips for the rear visors). I have had mine on for a year with multiple carwashes and of course climate changes and the visors are holding strong. I also have a carbon fiber rear window visor that is held on by 3m tape only and it weighs considerably more then these light visors, and have had no issue Just make sure you clean the area really good with alcohol.