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 exhaust VANOS hub on the S54 has a common failure point where the tabs that lock into the oil pump disk can break, causing loss of VANOS function or engine damage. This VAC exhaust hub is the perfect upgrade or replacement for your already broken hub. The larger engagement tabs fit the holes on the pump disk for a more secure fit to avoid the hammering of the factory hub faces that cause the broken tabs. Included: VAC S54 VANOS hub Valve Cover Gasket VANOS Gasket Genuine BMW Hardware
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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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