Has anyone got much experience of these, in particular reference to the A4 2.0TDi 140?
To me looks like the perfect option, much better performace gains than I would experience with a removable tuning box such as Tunit (which I have on my current vehicle). Yet it is supposedly invisible to the dealership?
Can anyone confirm, if you upload the new code and then revert back to the old code to take the car in for service etc. is it really undetectable? I wondered whether the ECU program might have a timestamp or something.
My new A4 (coming December) will be a company/lease car and as such I can't risk invalidating the warranty, however I know I won't find 140bhp enough and have just started researching my options.
Thanks in advance