Improper VANOS function will cause reduced power and poor fuel economy. The VANOS system is BMWs version of variable valve timing and can be found on the intake and or exhaust camshafts. The system uses a pair of electrically actuated solenoids that direct the flow of pressurized oil to the VANOS gears. Depending on engine requirements the VANOS system can advance or retard timing as requested by the ECU.
The VANOS solenoid switch in your BMW is a common failure point, and can cause loss of power and poor running conditions. This kit includes a new solenoid, a new control piston, and new sealing ring.
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