Intermotor 50721 oil pressure switch. Item is new old stock ex motor factors stock. The metal has tarnished but not rusty.

FITMENT

BMW E34 M5    1989 to 1996

BMW E30 M3    1985 to 1991

BMW Z1      1988 to 1991

All above info has come from a intermotor parts book. Please make sure this is the correct part you need before buying.