Its a hardware product that does nothing to the tiguans ECU, took about 1 minute to install. Unplug the throttle connector on top of the gas pedal and plug the connector to the device and the output from the device to the throttle connector that was unplugged. It is just intercepting the voltage coming from the pedal and adjusting it to various different Throttle Map curves based on your preference. Stock, Stages 1,2, and 3. and you can fine tune the response up and down in each stage. Its maps are just better imo than the single map that is stock from the VW ecu.
Don't let weak and unresponsive factory gas pedal mapping ruin your driving experience! This low cost plug and play tuner attaches to your gas pedal allowing you to remap and improve throttle response. Fast Shipping. Easy install.
burgertuning.com