Shock horror
...Companies selling tuning boxes will tell you to avoid remaps, and companies selling remaps will tell you to avoid tuning boxes
Just be wary of any engine modification, whether a tuning box or remap for warranty purposes, especially those that promise they are undetectable.
Just go into it with your eyes open about whether it could affect potential future claims. I'm always wary of those firms that seek to maximise the on paper gains...at the expense of real life durability and reliability
If during a diagnostic scan or inspection the online factory diagnostics systems pick up non-factory software, non-standard boost readings or the technician sees visible engine modifications, vehicles are being marked as being modified.. otherwise known as the TD1 indicator which can then be used to deny future warranty claims.
For example:
http://www.revotechnik.com/support/sales/is-revo-software-undetectable
I know this as our previous A6 TDI had a Bluefin remap to modestly boost the power from 170hp to circa 195hp and 350nm to 410nm torque. I never had any cause to make any engine/clutch/gearbox warranty claims, but my very friendly local service rep had explained openly beforehand about the process all the VW brands are now using to spot modified cars. I could have gone for any number of firms that would no doubt get better remap results, but played safe. It turned out to be a brilliantly usable remap in real life rather than too peaky.
The A6 was duly noted as TD1 at the next service. I reverted it to the stock map when I traded it in 3 years later.
Bluefin suggest that my current 190 A6 TDI should go from 190hp to circa 220hp and 400nm to 460nm torque, but I've held back from doing that
as I wasn't sure of the durability of the (then) just introduced 7-speed DSG for the Audi, and I certainly won't be messing around with my company car Golf GTD
