BMW OEM Radiator cap for 318i 318is 318ti 320i 323Ci 323i 325Ci 325i 325is 325xi 328Ci 328i 330Ci 330i 330xi 525i 528i 530i 535i 540i 540iP 735i 735iL 740i 740iL 740iLP 745i 745Li 750i 750iL 750iLP 750Li 760i 760Li 840Ci 840i 850Ci 850CSi ALPINA V8 B7 ALPINA M3 M3 3.2 M5 M5 3.6 X3 2.5i X3 3.0i X3 3.0si X5 3.0i X5 4.4i X5 4.6is X5 4.8is Z3 1.9 Z3 2.5 Z3 2.5i Z3 2.8 Z3 3.0i Z3 M3.2 Z4 2.5i Z4 3.0i Z4 3.0si Z4 M3.2 Z8 by REUTTER Expansion Tank Cap (2.0 bar) - Qty 1 Please see Product Description below for compatible models. Eluka Inc Warranty: 12 months / 12000 miles