Elring 147.66 (OE 11361740840) is the sealing gasket that mounts between the single-VANOS unit and the cylinder head on BMW's early variable-camshaft-timing six-cylinder engines. It is a wear item that hardens and shrinks with age and heat cycling, and a failed gasket here is a common cause of a VANOS oil leak or a loss of VANOS oil pressure.

Fitment: BMW E34 525i, E36 323i/323is/325i/325is/M3, E39 528i (produced up to 09/1998), E46 323Ci, and Z3 2.3/2.5/2.8/M Coupe/M Roadster, fitted with the single-VANOS M50, M52, S50, or S52 engines (2.5L-3.2L) — not the later double-VANOS M52TU or M54.