The VANOS Seals by VANOSFix for the S54 are the leading seals for rebuilding your VANOS on the E46 M3, MZ3, and MZ4 with the S54 engine. Over time, the factory VANOS seals wear due to their inferior materials. The VANOSFix kit utilizes upgraded VITON seals and is HIGHLY recommended when servicing any S54 engine.
