This 2008 BMW X5 535d, with a 3.0-litre twin-turbo diesel engine, was tested on the dyno before and after an engine software calibration. The baseline was close to the quoted factory figures: 286 hp and about 580 Nm. At the time of the test, the DPF, EGR hardware and intake manifold swirl flaps were still physically fitted.

Calibration result

After calibration, the dyno showed approximately 337.5 hp and 682 Nm—about 52 hp and 102 Nm above the baseline reading. In the video, the owner said that hardware changes to the emissions system were planned for later; they had not been carried out during the filmed dyno test.

The video also shows a repeat run and a road check. The result applies to this specific engine and its condition at the time of testing.