BMW Genuine Belt - A/C AC Climate Compressor 4K X 863 for 525i 530i 320i 325Ci 325i 325xi 330Ci 330i 330xi X5 3.0i X3 2.5i X3 3.0i Z4 2.5i Z4 3.0i BMW Genuine Belt - A/C AC Climate Compressor 4K X 863 BMW Manufacturer Warranty: 12000 miles or 1 year Please see Product Description below for vehicle compatibility.