Integrated Engineering AQ250 Transmission Tune 2.5L I5

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Integrated EngineeringSKU: IESOVY1 DIY Difficulty:

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Product Questions & Answers

Product Questions & Answers

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  • How do I install Integrated Engineering ECU / TCU tunes on my VW / Audi?

    In order to install the tunes, you will need to also purchase the Integrated Engineering POWERlink Flash Cable, which you can find HERE.  You will be able to flash your engine and/or transmission with the software that is included with your POWERlink Flash Cable.


Stock transmission tuning on the automatic VW 2.5L engines limits the RPM range and greatly reduces the available power of your rev happy 2.5L 5 cylinder engine.  IE's TCU tune has been carefully set up to offer you the full performance benefits of ECU tuning and hardware upgrades such as the IE Intake Manifold by safely increasing the available RPM limit.

The result is a fully unlocked power range offering the entire performance capability of the 2.5L engine on your automatic transmission.


  • Unlock higher RPM limits on 2.5L automatics
  • Higher shift points of 6800 or 7100 RPM
  • Allows the use of the IE Intake Manifold on automatics
  • Perfect match for Stage 1 or Stage 2 ECU Tunes
  • Flashed directly through OBD-II Port (No TCU removal required)
  • All safety and reliability features retained

What's Included:

  • Integrated Engineering AQ250 Transmission Tune
  • IE PowerLINK V3 Flash Cable (OPTIONAL)

Vehicle Fitment

Model   + Drivetrain  
1B Jetta 2.5L I5
1K Jetta 2.5L I5
B7 Passat 2.5L I5
MK5 Rabbit 2.5L I5
MK6 Golf 2.5L I5

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