The purpose of vanos solenoid valve is that it adjusts the camshaft for the intake and exhaust valves, allowing for smoother idling, more torque, and a more elastic powerband. In addition to this, the vanos solenoids control the flow of oil to the cam gears, which is what allows the timing to adjust. Dirty, clogged, or improperly functioning vanos solenoids will have a significant impact on horsepower, performance, and overall drive-ability.
This solenoid is a common source of check engine lights and limp mode. Therefore this replacement Vanos Solenoid Valve for your N51/N52/N53/N54 BMW, such as E82/E90 135i, 323i, 325i 328i 330i & 335i is a replacement for you if your is missing, damaged or badly worn.
Listing is for one unit only, you will usually need two if you are replacing both on the N54 cars.