Part Type: Engine Coolant Reservoir Cap. 1986 BMW 325 1.2 Bar; Screw On Cap;. 1987 BMW 325 1.2 Bar; Screw On Cap;. Compatible Years: 1986 1987. Notes: 1.2 Bar; Screw On Cap;. Expansion Tank Cap. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.