This BMW E61 has a twin-turbo diesel engine and came in for a power increase and work involving DPF and EGR control. When the ECU was read, the software was found to have already been modified. The calibration was therefore reworked instead of assuming the car still had its factory file.

After the software work, the dyno run recorded 356 hp and 665 Nm. However, heavy black smoke was visible under full load. The technician suspected that one of the turbochargers might not be supplying enough air and planned further diagnostics. A turbocharger fault was not confirmed during this test.

The video title claims gains of 70 hp and 120 Nm; the exact baseline should be checked against the dyno graph.