BMW Genuine Chain Tensioner Cylinder - Timing Chain for 525i 320i 323i 325i 325is 328i 525i 528i 530i 320i 323Ci 323i 325Ci 325i 325xi 328Ci 328i 330Ci 330i 330xi X5 3.0i 525i 530i X3 2.5i X3 3.0i Z4 2.5i Z4 3.0i Z3 2.5 Z3 2.5i Z3 2.8 Z3 3.0i BMW Genuine Chain Tensioner Cylinder for Timing Chain BMW Manufacturer Warranty: 12000 miles or 1 year Please see Product Description below for vehicle compatibility.