Sep.30 (GMM) BMW is to be the third engine manufacturer subjected to inspections to test conformity with the engine freeze.
After Lewis Hamilton's Mercedes-Benz unit was checked and given the all-clear following the German grand prix, the FIA looked into the 2.4 litre V8 used by Ferrari's Felipe Massa at Spa-Francorchamps.
Next, ahead of the forthcoming Japanese grand prix at Fuji, the governing body has announced the investigation of the power plant fitted to Nick Heidfeld's BMW-Sauber.
The routine check involves comparing the German's Singapore-specification engine with the homologated unit submitted to the FIA at the beginning of the season.