There are multiple threads all over the forums about this and general consensus is that a ecu map can always be detected even if flashed back to stock before taking into dealer
There are piggyback back modules that plug in to the ecu harness i.e jb1 ect but these usually use a way to trick the ecu into over fueling and over boosting and can in some cases hurt your motor/turbo
But are removable most say they can't be detected once removed but until your in that position you will never quite know
There is only 1 that i know of that offers a warranty of 2 years(everyone else your on your own)is abt but to make up for that they are double the price for the piece of mind and the outputs are somewhat lower than apr, jb1 ect (hence why they have a warranty i assume)
But you can order vw and audi in germany with a factory abt tune!
2017 Golf Alltrack 135tdi All options
19 inch Brescia Wheels Golf R brakes front and rear
Calipers painted Candy apple gold
New rear sway bar and linkages
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