Stage 1 file for 2.0 TDI PD Audi A4 (EDC16, SW 391501) — stronger midrange torque & better throttle feel
This Stage 1 ECU calibration is built for the Audi A4 2.0 TDI PD with Bosch EDC16 (software 391501). It delivers improved low- and mid-range power, smoother delivery, and refined fuel economy under partial load.