BMW part number 34331151532 is an In-Line Vacuum Brake Booster Non-Return Check Valve. This 12mm dual-barb inline plastic valve as an OEM part across major European automotive assembly lines (BMW, Mercedes, Porsche, VW, Volvo, etc). The arrow on the check valve MUST point towards the engine's intake manifold (away from the booster). The arrow indicates the direction of airflow, not vacuum. Since the engine's intake manifold acts as a pump that sucks air out of the brake booster to create a vacuum, the air flows from the booster into the engine. Install it backwards and you'll know right away. The pedal will be rock hard with almost NO power assist. The valves are even color coded to prevent installation errors - black half towards the intake manifold, white half towards the booster.
BMW
- 1967–1976 BMW 2002 Series (Includes 1602, 2002, 2002tii, and 2002turbo)
- 1968–1977 BMW E3 "New Six" (Includes 2500, 2800, 3.0S, 3.0Si, and Bavaria)
- 1970–1974 BMW E9 (Includes 2800cs & 3.0cs)
- 1977–1983 BMW 3 Series (E21) (320i, 320is)
- 1975–1981 BMW 5 Series (E12) (528i, 530i)
- 1982–1987 BMW 5 Series (E28) (528e (-11/86), 533i)
- 1977–1982 BMW 6 Series (E24) (630CSi, 633CSi)
Mercedes-Benz
- 1963–1971 Mercedes SL-Class (W113 "Pagoda") (230SL, 250SL, 280SL)
- 1965–1972 Mercedes S-Class (incl SE/SEL) (W108 / W109) (250S, 250SE, 280S, 280SE, 280SEL, 300SEL)
- 1961–1971 Mercedes Fintail Generation (W111) (220b, 220Sb, 220SEb)
- 1968–1976 Mercedes "Stroke-Eight" Models (W114 / W115) (220, 230, 240D, 250, 280)
- 1973–1980 Mercedes S-Class (W116) (Select early-production 280S, 280SE, and 450SEL)
Porsche
- 1977–1979 Porsche 924 Base (2.0L Naturally Aspirated)
- 1979 Porsche 924 Turbo (931 Chassis)
Volvo
- 1990–1993 Volvo 240 (Base, DL, and wagon trims utilizing inline 12mm hose architectures)
Volkswagen & Audi (VAG) Classics
|
