{"product_id":"dorman-419-365-accessory-drive-belt-tensioner-assembly","title":"Dorman 419-365 Accessory Drive Belt Tensioner Assembly","description":"\u003ch2\u003eOverview of Dorman Accessory Drive Belt Tensioner Assembly\u003c\/h2\u003e\u003cp\u003eThe Dorman 419-365 accessory drive belt tensioner assembly is engineered for reliable performance in select BMW models. Designed with durable aluminum and plastic components, this tensioner ensures proper serpentine belt tension for optimal engine operation in BMW 125i, 128i, and 325i vehicles.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from lightweight aluminum for strength and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes one automatic belt tensioner and one mounting bolt for installation\u003c\/li\u003e\n\u003cli\u003eFeatures a single plastic pulley with a 40 mm bearing diameter\u003c\/li\u003e\n\u003cli\u003eDesigned for serpentine belt systems with a maximum adjustment range of 180 degrees\u003c\/li\u003e\n\u003cli\u003eCompatible with BMW 125i, 128i, and 325i models\u003c\/li\u003e\n\u003cli\u003ePart number 419-365 ensures exact fit and function\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis Dorman accessory drive belt tensioner assembly (part number 419-365) is specifically designed to maintain proper tension on the serpentine belt in BMW 125i, 128i, and 325i models. The tensioner body is made from aluminum, providing a balance of durability and lightweight construction. It features a black and silver finish, with an overall length of 145 mm, an outside diameter of 70 mm, and an inside diameter of 17 mm. The tensioner includes one mounting hole with a 12 mm diameter, facilitating secure attachment to the engine assembly.\u003c\/p\u003e\u003cp\u003eThe tensioner pulley is made of plastic and contains a single bearing with a 40 mm diameter, designed to rotate clockwise (CW) to maintain belt tension. This assembly supports serpentine belt systems without grooves on the pulley, ensuring smooth operation and reducing wear on the belt. The maximum adjustment range of 180 degrees allows for precise tension control, which is critical for maintaining engine accessory performance.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBMW 125i\u003c\/li\u003e\n\u003cli\u003eBMW 128i\u003c\/li\u003e\n\u003cli\u003eBMW 325i\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis accessory drive belt tensioner assembly is compatible with the above BMW models, providing a direct replacement for worn or damaged tensioners to restore proper belt tension and accessory drive function.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Tensioner Assembly\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEliminates belt slippage caused by insufficient tension\u003c\/li\u003e\n\u003cli\u003ePrevents premature serpentine belt wear and cracking\u003c\/li\u003e\n\u003cli\u003eReduces noise from loose or misaligned belts\u003c\/li\u003e\n\u003cli\u003eMaintains proper accessory drive system performance\u003c\/li\u003e\n\u003cli\u003eHelps avoid engine overheating due to accessory failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman 419-365 tensioner assembly requires removal of the old tensioner and proper alignment of the serpentine belt. Use the included mounting bolt to secure the tensioner in place. Ensure the tensioner rotates clockwise as designed and verify belt tension after installation. It is recommended to inspect the serpentine belt for wear and replace it if necessary during installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this accessory drive belt tensioner assembly to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and quality bearing components contribute to long service life. This part is backed by Dorman's standard warranty coverage, providing assurance of reliability and performance for BMW 125i, 128i, and 325i owners.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43610964197557,"sku":"BKLB-419-365","price":114.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_419365_Fro.jpg?v=1774983454","url":"https:\/\/www.partcatalog.com\/products\/dorman-419-365-accessory-drive-belt-tensioner-assembly","provider":"PartCatalog","version":"1.0","type":"link"}