APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 1.9 TDI. APR’s ECU upgrade is conveniently flashed to the vehicle’s factory ECU through the OBD-II port without any physical modification to the factory ECU.

The ECU’s Bosch EDC engine management system is responsible for proper operation of the engine during constantly changing environmental and load conditions. With built in compensational data for environmental variables and varying load conditions, the factory ECU is far more complex and intelligent than units found in other vehicle makes and marques.

APR's Calibration Engineers spent months calibrating the engine management system, including many hours of chassis dyno development. With a thorough understanding of the ECU’s torque structure, APR’s Calibration Engineers properly increased engine load to produce more power and torque across the entire power band. APR’s ECU Upgrade increases boost pressure, optimizes fuel injection and more to produce higher output!

APR’s ECU Upgrades provides an excellent leap in horsepower and torque while retaining OEM knock control sensitivity and other built in safety features. This results in an exciting and powerful upgrade..

APR Stage I ECU Upgrade

There are many versions of the 1.9 TDI ranging from roughly 40 horsepower to 160 horsepower from the factory. On average APR's ECU Upgrade offers an excellent 15-30% gain in peak torque and horsepower over the factory output.