This genuine BMW/MINI timing tensioner sealing sleeve seals the timing chain tensioner bore in the cylinder block, preventing oil seepage around the tensioner housing on modern B-series engines. It is a small but important seal to replace whenever the tensioner is removed or when oil is found weeping from this area.

Fitment: BMW 2, 3, 4, 5, X, and 7/8 Series models built on the B46, B48, B58, and S58 engine families (including M2, M3, M4, M340i, M440i, and X3 M/X4 M), as well as select MINI models with the B36C, B38, B46, and B48 engines.