Does it void the warranty if you get tints on a leased car?

It is always best to carefully read your warranty to be sure. This type of modification, if done professionally (not by you ), should not cause a warranty problem. However, it could adversely affect the residual value (the amount they say your car is worth) of your vehicle when you return it at lease end. The amount could be quite high if the dealer decides that the Windows need to be replaced. Yes, I know that sounds crazy but leasing can be a crazy business and some of the reasons for dropping the residual value can sound almost insane.