[marcthedark]

Originally Posted by B58

It can void your warranty, but Dinan has their own warranty that will cover the repair if the dealer can prove the tune caused it to fail.

https://www.dinancars.com/warranty/

It will void your warranty for the engine/transmission and the dealer will argue that the tune is the cause. They don't have to prove that it was the tune you have to proof it wasn't the tune .... enter the Dinan warranty who would step in in cases like this.