The owner of this BMW E91 3.0d had bought the car with an existing tune. The DPF had been physically removed, but a DPF warning appeared after roughly two years of use. Inspection of the ECU file found that the previous calibration had not been properly matched to the condition of the DPF and EGR systems.

With the previous software, the dynamometer recorded 206 hp and about 470 Nm. After the file was checked, the ECU calibration was revised and the car was measured again. The dyno result was 335 hp and 744 Nm; a repeat run recorded around 330–335 hp.

The car retained its standard engine and single turbocharger. After tuning, the video shows only minimal smoke at the very top of the load range. The final checks considered both power output and keeping smoke from becoming excessive.