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VW MK8 & AUDI 8Y TCU UNLOCK GUIDE

2022+ Golf R & S3

Welcome to our step-by-step guide for verifying if your 2022+ VW MK8 or Audi 8Y Transmission Control Unit (TCU) is compatible with iE’s Transmission Tunes. Due to advanced security locks, we must ensure your TCU can be flashed before you purchase. There is no way to tell if you can upgrade this TCU without a quick and easy test -you will need your iE POWERlink for that. Don’t worry, our iE ECU tune will still deliver full power even if your TCU is locked.

STEP-BY-STEP GUIDE

WHAT YOU'LL NEED

STEP 1: LAUNCH FLASH WIZARD & TEST

  1. Launch the App: Plug in your iE POWERlink to the OBDII port, connect the USB cable to your laptop, and launch the POWERlink Flash Wizard

  2. Navigate to the Extras Menu: Click the Extras tab from the main menu.

  3. Select "Detect DSG Bootloader": This free test check’s your TCU’s security status.

    Note: You will need to pop the hood and have the key turned to ignition. A loud clunk sound is normal during the test.

STEP 2: CHECK THE TCU VERSION

  1. Take note of the Bootloader info: After completing the TCU check, a popup will appear with your TCU version.

  2. Interpret the Results:
    • Tunable TCU: DSG version will be listed as "Bootloader info: 0301" if the TCU is flashable.
    • Locked TCU: If the TCU is locked, the version will show "Bootloader info: 0401".

IF YOUR TCU IS FLASHABLE

Congratulations! You can now purchase and flash the iE MK8/8Y TCU Tune whenever ready. No additional steps are required.

IF YOUR TCU IS LOCKED

  1.  Enjoy Your ECU Tune: Your ECU tune will still be fully operational and deliver full power without the TCU tune. (No low-torque file needed)
  2. Stay Updated: Sign up for our mailing list (popup on home page) to get notified when a solution for your locked TCU becomes available.

If you have any questions or run into issues during this process, get fast and easy help from our expert team of Mod Gurus.