Some customers are concerned that remote car starters and other after market installations may void their vehicles warranty which is false. The Magnuson-Moss Warranty Act is a federal statute that governs warranties on consumer products, it is remedial in nature and is intended to protect consumers from deceptive warranty practices. If told by your manufacturer that a third party product would void the warranty, ask them for documentation to this claim. To void your warranty your manufacturer would have to prove to the Federal Trade Commission that a third party installation would cause a malfunction to your vehicle.