[TJay74]

Originally Posted by fastball

That is highly illegal. They can only void warranty repair work on a certain part if they can PROVE the modification you made DIRECTLY, SPECIFICALLY caused the failure of that EXACT AND ONLY part.

They cannot legally void your factory warranty for the entire drivetrain if you just change the parameter of one thing for one specific part or operation.

Wrong as yes they can when it comes to calibrations and such. The Magnusson Moss Warranty act was for using aftermarket parts in place of the OEM parts for repairs or maintenance. It provides and allows no protection for modifying the calibration in the ECM/TCM.

The MMWA was setup so people could change their oil at home using a Fram Filter with Pennzoil oil. As long as the filter and oil meet the vehicle manufacture spec's then the manufacture could not decline warranty coverage unless the manufacture could prove that filter or oil caused the failure. Pure and simple, that is all the MMWA is designed for, that if while under warranty you replace a OEM part with a aftermarket part that the manufacture has to prove your 3rd party part caused the subsequent failure.

I have seen plenty of warranty blocks done here in the USA on Ford and GM, and plenty of owners on the Audi forum have confirmed that they are "TD1'd" with their warranty as well due to changing the calibration.

When you change the calibration in the computer it alters what GM provided to the .gov for when the certification process for that engine was approved by the EPA program.