less to do with keys more to do that your dsg is coded to your engine and visa versa. Plus audi will only code one ecu at a time so you can't have an extra one, well you can have an extra one but it will just be an expensive paper weight on your desk.

Unfortunately as other have said it isn't a good idea to even attempt this. Flashing back to stock each time is the only reasonable option but if they can't ever flash through the OBDII port then it could get tedious really quick.

That's not technically true. The Magnuson-Moss Warranty Act actually puts the burden of proof on the warrantor to prove that a modification caused the defect.

In practice, you're right, there have been instances of dealers denying warranty claims due to modifications, sometimes with tenuous (at best) associations between the modification and the defect. These dealers are then in violation of the Act, at which time the only likely outlet for the consumer is litigation. But said litigation would have a high probability of being concluded in the consumer's favor.

APR responses to S6/S7 Concerns
 

These responses were posted on another forum. Not sure if this helps or confuses the situation even more. At the end of the day, I have always told the Shop Manger/Service Director that my car is tuned since the upfront honest approach is always the best approach.


If you retune the ECU to stock, all traces our software was on there are removed.

We will only ever flash you with the same same box code and revision as you had before.

So to clarify, the file flashed back to your ECU at an APR dealer is the same file you had before.


The dealer's software basically just sends out a message to the ECU and looks for an answer in response. If the answer is wrong, it gets flagged. Since it's back to stock, that doesn't happen. People across all the platforms have confirmed this to be true.

waiting on the coding for the A8L version of the 4.0 L turbo....

92 miles north of me....short drive :).

Mike