The Pierburg Group has been among the key partners of the automotive industry for more than 100 years and has successfully accompanied the development of automobiles since its establishment.

The main products developed and supplied by the Pierburg Group include control elements (actuators), control units, recirculation systems for exhaust gases, secondary air pumps and exhaust flaps.

 Exhaust Gas Flap:

• If the pressure gradient in the low pressure exhaust gas system is insufficient to control the required EGR mass flow rate, an electrical exhaust gas flap is used to generate ram pressure. 

• The exhaust gas flap can be adjusted between “open“ and “closed“ positions with continuous electromotive adjustment.

Operating Mode Electric
Diameter [mm] 54.00000
Voltage [V] 12.00000
Technical Information Number


OE Numbers:
BMW 11 71 7 791 481
BMW 11 71 7 804 384
BMW 7 791 481
BMW 7 804 384