This 2012 BMW F30 with a 2.0-litre diesel engine arrived after earlier work on its DPF system, but a warning indication remained on the dashboard. Initial diagnostics found increased exhaust backpressure and an EGR operating issue. The smoke reading before the filter was removed was close to zero, but that alone did not show that the DPF was working correctly.

The Bosch EDC17 ECU software was read in Bench mode so the calibration in the unit could be checked. The inspection found that the original software was still present. During the work, the DPF ceramic core was removed while the catalytic converter was retained. The housing was then welded and modified software was written to the ECU.

A post-work road check is shown in the video. No warning lights were on, and the car was described as driving well. Smoke readings of 0.40, 0.36 and 0.39 were recorded. The video does not state the units, and no dynamometer power measurement was made. Passing the roadworthiness inspection was mentioned as an expected outcome, but the inspection itself is not shown.