SKU #: CMNS-3947574 Cummins 3947574 Belt Tensioner Assembly 03-18 5.9L / 6.7L Dodge Cummins

As your Cummins develops some miles, the belt tensioner's spring can lose its ability to maintain tension, causing uneven wear of your belt, or the belt to completely fail altogether. If its time to replace your tensioner, check out this genuine Cummins direct replacement.