This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [BMW 325e: 1985, 1986, 1987] - [BMW 325i: 1987, 1988, 1989, 1990, 1991, 1992, 1993] - [BMW 325iX: 1988, 1989, 1990, 1991] - [BMW 525i: 1989, 1990] - [BMW 528e: 1982, 1983, 1984, 1985, 1986, 1987, 1988]