VANOS Valve Camshaft Engine Tool Fit for M42B18 M44B19 M50B20 M50B24 M50B25 M52B28 S50B30US M54B22 M54B25 M54B30. Vanos Turning Wrench — Engines: M50, M52, S50us, S52us. These tools are also compatible with BMW 4 and 6 cylinder none Vanos (no variable cam timing) engines.