FOR BMW 3 SERIES E46 M3 2000-2006 / BMW Z3 E36 M ROADSTER & M COUPE 1998-2003 / BMW Z4 E85 / E86 M 3.2 ROADSTER & COUPE 2002-2008 S54 ENGINE VANOS O-RING SEAL REPAIR KIT ( MADE OF VITON & TEFLON ) New part O Ring vanos seal kit S54 For BMW S54 engine Oil Seal Repair Kit. Vanos seal kit for BMW 6-cylinder engine S54: BMW 3 Series E46 M3 2000-2006 (All US E46 M3 & All Euro E46 M3) BMW Z3 E36 M Roadster & M Coupe 1998-2003 BMW Z4 E85 M 3.2 Roadster 2002-2008 BMW Z4 E86 M 3.2 Coupe 2006-2008 If you own one of the vehicles listed below, the o-rings and seals in the vanos unit of your BMW vehicle wear out after a certain period of time and the vanos unit does not work properly anymore. The VANOS unit by BMW stands for Variable Camshaft Timing and is responsible for the variable timing of the camshaft in relation to rpm, torque and engine oil temperature. The original seals installed in the vanos unit are not suitable for the use in the engine and this causes the sealing rings to not seal properly anymore and the vanos unit to fail. BMW does not offer these seals separately, but only the complete replacement of the vanos unit. But even in this exchange unit, the installed seals are again of inferior quality that wear out after a short service life of the engine. Symptoms can occur after a certain time: - loss of torque and power especially in the lower and middle RPM range - uneven power and rpm distribution - louder and uneven idle - difficult takeoffs - increased fuel consumption FOR BMW 3 SERIES E46 M3 2000-2006 / BMW Z3 E36 M ROADSTER & M COUPE 1998-2003 / BMW Z4 E85 / E86 M 3.2 ROADSTER & COUPE 2002-2008 S54 ENGINE VANOS O-RING SEAL REPAIR KIT ( MADE OF VITON & TEFLON ) ******* New part O Ring vanos seal kit S54 For BMW S54 engine Oil Seal Repair Kit. ****** Vanos seal kit for BMW 6-cylinder engine S54: ****** BMW 3 Series E46 M3 2000-2006 (All US E46 M3 & All Euro E46 M3) BMW Z3 E36 M Roadster & M Coupe 1998-2003 BMW Z4 E85 M 3.2 Roadster 2002-2008 BMW Z4 E86 M 3.2 Coupe 2006-2008 ******* Symptoms can occur after a certain time: - loss of torque and power especially in the lower and middle RPM range - uneven power and rpm distribution - louder and uneven idle - difficult takeoffs - increased fuel consumption ******* S54 Vanos Info The E46 M3, the Z3 M Coupe/Roadster and the E85/86 MZ4 Coupe/Roadster all came equipped with the s54b32 engine (commonly referred to as the S54) which was a much more complex engine than the earlier US Spec M3 had. The vanos unit on the S54 also evolved into a more complex unit and has it's own set of inherent problems that many S54 owners will run into eventually. The S54 Vanos controls both the intake and exhaust camshafts to improve performance, torque, idle characteristics and emissions. A high pressure (1200psi) control system is used to ensure responsive and accurate camshaft adjustments required by the high performance M engine. The added complexity and high oil pressure used on the S54 vanos means there are more opportunities for failures and related problems.