{"product_id":"cummins-3973819-belt-tensioner","title":"Cummins Belt Tensioner - 3973819","description":"\u003cp\u003eHeavy-duty Cummins 3973819 belt tensioner designed to maintain proper serpentine belt alignment and tension in ISC, ISL, QSL9, and QSB engines. Built to OEM standards, it reduces vibration, extends belt life, and ensures reliable accessory drive performance in demanding diesel applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProduct Type: Engine Belt Tensioner\u003cbr\u003eOEM Number: 3973819\u003cbr\u003eApplication: Cummins diesel engines\u003cbr\u003eEngine Compatibility: ISC \/ ISL \/ QSC \/ QSL \/ QSB\u003cbr\u003eBelt Compatibility: Serpentine multi-rib\u003cbr\u003eInstallation Type: Direct replacement\u003cbr\u003eFunction: Maintains belt tension, reduces vibration\u003cbr\u003eMaterial Construction: Steel housing + composite pulley\u003cbr\u003ePerformance Benefit: Prevents belt slippage, Reduces wear on accessories, Improves engine efficiency\u003c\/p\u003e","brand":"FleetPro Parts","offers":[{"title":"Default Title","offer_id":42680190140510,"sku":"3973819","price":116.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/2070\/1790\/files\/cummins-3973819-belt-tensioner-front-view.jpg?v=1776702432","url":"https:\/\/fleetpro-parts.com\/products\/cummins-3973819-belt-tensioner","provider":"FleetPro Parts","version":"1.0","type":"link"}