i had the 35% solar guard tint and YES! you will have navi problems...if the tint has somewat of a reflective tint you will have problems....since then i took it off and put a 20% regular black tint and have had no problems. Just beware of what kind of tint you decide to put on...also one more thing, i have a satin silver tsx and the solar guard look phat as hell, but my navi was messed up for weeks. so it's up to you