APR Stage 1 ECU Software Flash Tuning Audi Mk2 TT-RS


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The APR Mk2 TT-RS ECU Upgrade typically raises the power output of the 2.5T to 409 horsepower and 438 lb-ft of torque on 91 octane fuel with a peak gain over stock of 72HP @ 4,300 RPM and 89 lb-ft of torque @ 4,150 RPM! Expect improved throttle response and a smoother, more powerful top end with no loss of drivability or reliability.

APR software can be loaded with up to four user selectable Operating Modes as well as Extra Features*. APR's Flipswitch technology allows switching of Operating Modes or activation of Extra Features in seconds using the cruise control stalk with no need to purchase external hardware. Mode switching can also be performed via your iOS device with the APR Mobile Dongle (sold separately).

* Multiple Operating Modes and Extra Features available at an additional cost.

Operating Modes:

  • Exact OEM Calibration Stock Mode
  • APR 91 Octane Performance Mode
  • APR 93 Octane Performance Mode
  • APR 100 Octane Performance Mode
  • Valet Mode (Low power and speed)

Extra Features:

  • Fault Code Erase (FCE): Resets engine related fault codes.
  • APR Mobile Dongle Support: Allows use of the APR Mobile Dongle (purchased separately) to switch Operating Modes, read and reset fault codes, view real time parameters, and perform data logging.

APR 2.5T ECU Upgrade Vehicle Fitment:

Installation can be performed at our facility by scheduled appointment. Installation requires ECU removal, no soldering is required.

We recommend that ECU chipping be done at your nearest APR distributor, this will offer you the best technical support available. Check The APR Dealer Locator to find your closest APR dealer.
Installation of Security Lock Out and Anti-Theft is not available at Achtuning.

All APR ECU software comes with lifetime free updates (labor charges may apply). APR provides a lifetime warranty against defects in the software. All APR ECU upgrades have a 30-day Money Back Guarantee.
APR ECU Upgrade - 2.5 TFSI I5 (Mk2 TT RS) (409/438-91)
Please contact us to schedule your appointment, installation takes about an hour.
all software

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