Vacuum pump
Oil vacuum pump, B58/B58TU engine
Vehicles with a gasoline engine and "traditional brake system" need a vacuum pump to boost the pedal force. In vehicles with a gasoline engine and DSCi brake system no vacuum boost is required as in the DSCi brake system the pedal force is boosted hydraulically. The graphics show the oil pumps of the B58 engine and the B58TU engine with combined vacuum pump and without vacuum pump.