Which Tune

[Transporter]

I agree and am always upfront with my customers bout the warranty and what is void and what not. Also the one should consider what is the likelihood that they may need that warranty.

[Guy_H]

Well looks like VW knows when the MK7 Rs have been tuned :

Interesting thread on Pistonheads - Golf R Turbo Failure - TD1 | Audi-Sport.net

That's called "manual" TD1 tagging, pretty simple & been around for a decade. The service manager / VW rep can manually enter a "modified" tag on the cars history.

This happens for springs, wheels, exhausts, intakes.

It's not to be confused with automatic ECU tagging.