moserg

Hello everybody.
Just considering to have ECU Malone tune through FlashZilla.
Still have some warranty and wouldn't like to loose it. Definitely will be flash to stock before visiting dealer for any case.
Is anybody who did ECU upgrade, get flagged as using tune (TD1 mark on file) while being back to dealership with stock flashed back after tune?
Is that possible to have two ECU - buy ECU for same year and model, flashed with tune and used it and put back original ECU when visiting dealer?
Will it work?
Thank you.

bpp

When the ECU is compromised in any way, it can be 'seen'. Flash it for a tune, flash it 'back to stock', the dealer will see it. TD1 has been a flag, some dealers ignore it, others take issue IF you bring the car in for a problem that can relate to a tune. We've discussed and debated these issues many times over the years. Using 2 ECUs is kinda expensive and involves more than switching before going to the dealer like codes, duplication, etc, to consider. My CPU was fried when it was chipped and the tech replaced it and had to contact Siemans to sort out what had to be done. It was not pretty. .02
AFAIK the only tunes not detectable are piggyback tunes when remove from the system before going to the dealer but I could be wrong. You want to play it safe, don't mess with a good thing and leave it as is. .02

ukdes

It will definitely void your warranty