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I figured it was a silly question. I was just thinking down the road if I ever had a rattle in the door or anywhere near the window, they could say "well it must have been caused by the guy who tinted your windows".
If the guy installing the tint broke something during the install the dealer wouldn't cover that. Not very likely but it can happen. They use a heatgun during the install and they could melt plastic trim if they're really clumsy. Just go to a good tint shop and on the off chance they do mess something up make sure they fix it.
Ok if you are really worried about warranty you can ask the Stealer to install it for you. It will cost you an arm and a leg but they will replace all the parts that they damage while tinting for free. So if anything happens in the end it will still be under warranty cause the Stealer install it.