BMW Genuine Radiator Expansion Tank Mount Clip Cap for 3 5 Z3 Series E36 E39 for 320i 323i 325i 325is 328i 525i 528i 530i M3 M3 3.2 Z3 2.8 Z3 M3.2 BMW Genuine Mounting Cap Mounting Clip for Coolant Expansion Tank, Clips Around Bleeder Screw. Manufacturer Warranty: 12 months / 12000 miles Please see Product Description below for compatible models.