SVT-DADDY
World's heaviest S550
I am going to say if he has a bad control arm Ford is going to have a hard time denying that because of the tune.Not sure how you can state that "most tunes and such are a-ok". Even flashed back, there are counters that designate there was a change, and that can easily be enough for them to deny coverage. Then the burden shifts to you.
Warranty's may not be 'voided', but claims are denied all the time for modifications. Ford is not required to prove anything to make a denial. The standard is a preponderance of evidence if it gets to that point. Is the nature of the modification one which could reasonably lead to the defect? An aftermarket performance tune is by definition sending performance parameters which are out of manufacturers specifications.
The ball is then in your court to hire a lawyer and instigate action against them in front of a jury. Battling it out over a tune with experts on both sides is incredibly costly, far beyond what you are likely due, and its generally not worth the headache. There are attorney fee provisions in Magnusson Moss (if you win) but its a huge time sink. Literally a year or longer.
The value of the warranty claim must be high enough to fight.
The claim must be so good and obvious on its face to get an attorney to file it. Denying a claim is cheap and easy for the manufacturer. Especially if someone is messing around with performance parts and tunes.
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