11741265874 is a genuine Electric Valve (Color Code: Black), manufactured by Pierburg for BMW engines. This is an electromagnetic changeover switch used to route engine vacuum through small lines based on signals from the engine management system.
- The Function: It is primarily tasked with AGR/EGR (Exhaust Gas Recirculation) control or secondary air injection management. By switching vacuum on and off, it operates the vacuum diaphragms that allow metered exhaust gases back into the combustion chamber to reduce emissions.
- The Color Code: BMW coded this specific technical profile/flow-rate configuration in black plastic so technicians could visually differentiate it from the white, red, or blue valves sharing the same engine bay space.
This black valve replaced or worked alongside the earlier variants as BMW moved into Bosch L-Jetronic and Motronic fuel injection systems. It was heavily used primarily between 1977 and 1984 across these classic chassis groups:
- BMW 3 Series (E21): 1977–1983 (Specifically the 320i 4-cylinder and US-market variants)
- BMW 5 Series (E12 & E28): 1977–1984 (Models like the 528i, 530i, and early 533i / 535i)
- BMW 6 Series (E24): 1977–1984 (Mainly the 633CSi and early 635CSi)
- BMW 7 Series (E23): 1978–1984 (Models like the 733i and 735i
