S4/S5 tuning options


Registered User
Hi guys,
I'm thinking of coming back to the Audi brand and jumping into a S4 or S5 sportsack and was wondering what tuning options are available.
Last time I was around here the later S4/S5 ECU was not yet cracked and there was alot of nervousness surrounding Audi's new found ability to detect a mapped ECU this invalidating warranty.
As a result if this I believe a number of tuners were switching to tuning box technology instead of flashing the ECU. Such that it could be removed prior to service/diagnosis etc.

Any info would be useful......


Registered User
CREC engines fitted in cars from mid 2014 use the SIMOS 16 ECU. Many but not all tuners are able to remap it via OBD port. I know that the following in the UK have confirmed that they can (alphabetic order):

There may be others I don't know about. For example AmD - I think they might but I haven't confirmed.

Remaps can easily be detected by reading the ECU flash status, so there is always a risk that a tuned car will be flagged TD1.
"pay to play"...


Registered User
Having had a box (A3 TDi) and a flash (S5) tune, I'd go the flash tune every time...