{"product_id":"four-seasons-45986-accessory-drive-belt-idler-assembly","title":"Four Seasons 45986 Accessory Drive Belt Idler Assembly","description":"\u003ch2\u003eOverview of Four Seasons Idler Assembly 45986\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Idler Assembly 45986 is designed to maintain proper tension and routing of the accessory drive belt in select BMW models. Engineered with durable plastic material and precise dimensions, this idler assembly supports the smooth operation of the belt system in BMW 750iL, 850Ci, 850CSi, and 850i vehicles.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable black plastic for reliable performance\u003c\/li\u003e\n\u003cli\u003eMeasures 4.66 inches in length with a 2.9375-inch outside diameter\u003c\/li\u003e\n\u003cli\u003eFeatures two mounting holes with 0.25-inch diameter for secure installation\u003c\/li\u003e\n\u003cli\u003eDesigned as a back idler with a single groove and 1.0-inch belt width compatibility\u003c\/li\u003e\n\u003cli\u003eCompatible with BMW 750iL, 850Ci, 850CSi, and 850i models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis accessory drive belt idler assembly from Four Seasons is part of the Idler Assembly product line, which focuses on tensioners and pulleys essential for maintaining proper belt tension and alignment. The idler assembly is made from high-quality plastic, ensuring resistance to wear and heat within the engine compartment. It features an inside diameter of 1.01 inches and an outside diameter of approximately 2.94 inches (74.6 mm), with a pulley width of 0.94 inches (23.9 mm). The assembly includes two mounting holes, each with a diameter of 0.25 inches, designed for secure attachment to the engine block or bracket. This part is specifically engineered as a back idler for accessory drive belt systems, compatible with a belt width of 1.0 inch (25.4 mm) and a single groove configuration.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Idler Assembly 45986 is compatible with the following BMW models:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBMW 750iL\u003c\/li\u003e\n\u003cli\u003eBMW 850Ci\u003c\/li\u003e\n\u003cli\u003eBMW 850CSi\u003c\/li\u003e\n\u003cli\u003eBMW 850i\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis idler assembly is designed to work within the accessory drive belt system of these vehicles, ensuring proper belt tension and routing for optimal engine accessory performance.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Idler Assembly\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEliminates belt slippage caused by worn or loose idler pulleys\u003c\/li\u003e\n\u003cli\u003ePrevents premature belt wear due to misalignment\u003c\/li\u003e\n\u003cli\u003eReduces noise from squealing or chirping belts\u003c\/li\u003e\n\u003cli\u003eMaintains consistent belt tension for accessory components\u003c\/li\u003e\n\u003cli\u003eHelps avoid engine overheating by supporting proper belt-driven cooling system operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the engine is cool before beginning installation\u003c\/li\u003e\n\u003cli\u003eVerify the mounting hole alignment matches the vehicle’s bracket\u003c\/li\u003e\n\u003cli\u003eUse proper torque specifications for mounting bolts to avoid damage\u003c\/li\u003e\n\u003cli\u003eInspect the accessory drive belt for wear and replace if necessary during installation\u003c\/li\u003e\n\u003cli\u003eConfirm belt routing matches manufacturer specifications after installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eFour Seasons Idler Assembly 45986 is manufactured to meet OEM standards for fit, form, and function. The plastic construction is engineered for durability under typical engine operating conditions. While specific warranty details are not provided here, Four Seasons products generally come with a limited warranty against defects in material and workmanship. Always consult product documentation or contact the manufacturer for exact warranty terms.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":44599917281461,"sku":"BBRN-45986","price":54.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_45986_Fro.jpg?v=1775068458","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-45986-accessory-drive-belt-idler-assembly","provider":"PartCatalog","version":"1.0","type":"link"}