> If I swap out my car's engine with a more powerful one yes, legally required to be covered in the us. > and screw up the drivetrain will warranty cover it?

> If I swap out my car's engine with a more powerful one yes, legally required to be covered in the us. > and screw up the drivetrain will warranty cover it? No, not legally required to be covered in the us. The difference is the law specifies the manufacturer can not assume a leads to b, they have to a reason to think b was caused by a.