Diesel Engine Belt Tensioner 3691282 4299091 For Cummins ISX15 QSX15 DAYCO NEW. 100% New and High Quality. Stable characteristics, high reliability. Profession install is highly recommend. 4299091,3682946,2871292,89440,180885,3691282,883020C2, 38587, 36165, 38609, 49563, 910074, 4299091, 369128. 1X Belt Tensioner Assembly. To make sure part can fit perfectly, please read item description and check item pictures and part number of your part.