Warranty can not be voided just due to modifications
I agree, Hyundai is marketing this car as a tuner car. That can work in our favor. But to your point, Mods in itself can not void a whole warranty, they can only deny a warranty claim. However the manufacture has to prove that the modification was the cause of a failure. For example, if you get a new hi-flow intake and your ABS takes a crap, they can't come to you and say, "Hey you modified your intake, so your warranty is void and we're not going to fix your brakes." This would be in contrast to someone slapping on some Nitrous oxide and trying to get 1000HP and in the end cracking the block in half. These provisions are specifically covered under the Magnuson-Moss federal act but it can be upto interpretations per the dealership. What I would suggest is find a "tuner-friendly" dealership and goto them for warranty work. With my WRX I've had to do the same thing and once had a whole engine block rebuilt by the dealer. In my situation I was running more than stock boost levels but faulty injectors caused my engine to run extremely lean. End result was a blown motor but I talked to the right people and was taken care of.Everyone knows that Hyundai is selling this car as a "tuner-friendly" car. My question is does anyone know what the policy is going to be with the warranty regarding modification; are there going to be any changes to the voiding of the warranty due to modification?