This BMW came to the workshop with a loss of power. According to the workshop, a non-original DPF had previously been fitted and was later removed by the owner. The video says the filter had melted, but does not establish the full cause of the damage.

Checking the ECU file and data logs

The technician read the previously modified ECU file and temporarily restored the original software to identify the changes that had been made. Data logs were used to assess fuel delivery, fuel-rail pressure and other engine parameters. The control-unit software was then corrected and written again.

After the software correction

The vehicle was road-tested after the changes, and the workshop reported that power had returned. The video gives no final dyno figures for power or torque, so the result is described qualitatively rather than with specific numbers.

The DPF still needed assessment

Correcting the ECU calibration does not resolve the condition of the DPF or exhaust after-treatment system. At the end of the video, the DPF inspection was still planned; no filter replacement or restoration is shown. This work should therefore not be treated as a completed DPF repair or proof of an inspection result.