BMW OEM Belt Drive Climate A/C AC Compressor Ribbed V-Belt Belt 4K X 863 for 320i 325Ci 325i 325xi 330Ci 330i 330xi 525i 530i X3 Belt - A/C Compressor 4K X 863 Manufacturer Warranty: 12 months or 12000 miles Please see Product Description Below for Vehicle Compatibility