Ensure your engine's belt runs smoothly with this high-quality 4059202 Belt Tensioner, a crucial component for maintaining proper belt tension and preventing premature wear. Designed to fit a range of Cummins engines, including models M11, K19, NT855, X15, QSX, and ISX, it's an ideal replacement or upgrade for your existing setup. With the OE/OEM part number 4059202 and superseded part number 3681240, you can trust in its compatibility and durability. Manufactured in China, this belt tensioner is built to meet stringent standards, providing a reliable solution for your engine maintenance needs.