This 2003 BMW E65 with a 3.0-litre diesel engine was first tested on a dynamometer in its standard setup. The first run showed 191 hp and 397 Nm, with an uneven power curve. During a diagnostic test with the air mass meter connector disconnected, the next run showed 235 hp and 500 Nm, pointing to a possible sensor issue.

The engine control software was then calibrated. The video title gives a result of 283 hp and 576 Nm. Disconnecting the air mass meter was a diagnostic check, not a description of the car’s final configuration.

Comparing dyno graphs helps identify not only peak figures but also fluctuations in the power curve, which can point to issues in the engine management or measurement systems.