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2021 Forte GT w/GT2, Currant Red, Wagner-Tuning Intercooler, Evilla Exhaust, Takeda S1 Intake
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I know there is always discussion about whether adding CAI, Exhaust, etc will void your warranty. I was doing some investigation and came across this.
So if your dealer tries to tell you different, just tell them it's the law and have this info handy.

Magnunson-Moss Warranty Act - Aftermarket Parts

Magnuson-Moss Warranty Act (P.L. 93-637) is a United States Federal Law (15 U.S.C. 2301 et seq. )

This act protects you if you use non-manufacturer's replacement parts such as filters, sparkplugs, belts, tires, oil, wiper blades, mufflers, mounts, brake pads, etc. It does not mean you can alter the vehicle and expect the manufacturer to repair it under warranty. If you install after market high compression pistons don't expect the manufacturer to warranty a head gasket leak. If you use a spark plug with a longer reach than factory sparkplugs and bend a valve you're going to pay. As posted above, a CAI that removes the air box from the ECU can void your warranty on the ECU if it goes bad. Installing aftermarket brake pads can void your brake warranty if you have something go wrong with your rotors since the manufacturer can - and will - claim the pads may have had something to do with the failure. There is a reason manufacturers spend so much time and money on testing.

The act requires the manufacturer to make their warranty available in writing -- the manufacturers warranty states that altering the way a vehicle is delivered to you can be taken as abuse. They put it in writing so they have a "leg" to stand on in court.

If you have a problem with your car and there is a modification to it in that area the chances are the manufacturer is going to deny warranty coverage (depends on how well you get along with your dealer too).

You'll hear others say to take them to court if you have a warranty problem -- how many can afford the cost? IF one can even find a lawyer to take such a case -- I've tried getting a lawyer to take on a company that sent me an obviously defective part but none would -- They are all personal injury lawyers nowadays!

Be careful with your choices...if your going to ready to pay.

If in doubt, you can always ask your dealer's service manager for advice. My dealers service manager told me he would not honor the warranty on the ECU if I use a CAI that removes the airbox (which helps cool the ECU) and the ECU fries. Because of this I won't take the chance. He gave me the "green light" on my Solo Performance exhaust (as long as I don't use the free flow Cat) so I have it on.
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