BMW 5 serie E39 - 1995 - 2003 523i 170hp ECU Remapping
A professional ECU remap can optimise the way your BMW 5 serie delivers power and torque, helping the vehicle feel stronger, smoother and more responsive in everyday driving.
The expected Stage 1 figures for this vehicle show an increase from 170 BHP to 187 BHP, with torque improving from 245 Nm to 272 Nm.