{"product_id":"gates-39400-accessory-drive-belt-tensioner-assembly","title":"Gates 39400 Accessory Drive Belt Tensioner Assembly","description":"\u003ch2\u003eOverview of Gates DriveAlign Premium OE Automatic Belt Tensioner\u003c\/h2\u003e\u003cp\u003eThe Gates DriveAlign Premium OE Automatic Belt Tensioner 39400 is engineered to maintain optimal tension on the accessory drive belt system. Designed specifically for BMW and Mini models including Cooper, Cooper Clubman, Cooper Countryman, Cooper Paceman, X1, and X2, this tensioner assembly ensures reliable belt performance and longevity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThermoplastic construction for durability and resistance to wear\u003c\/li\u003e\n\u003cli\u003eSingle pulley design with a smooth backside contact surface\u003c\/li\u003e\n\u003cli\u003eCompatible with V-ribbed belt types\u003c\/li\u003e\n\u003cli\u003eTwo mounting holes for secure installation\u003c\/li\u003e\n\u003cli\u003ePrecise dimensions: 2.56 inch (65 mm) outside diameter, 1.02 inch (26 mm) width, and 0.67 inch (17 mm) bearing bore inside diameter\u003c\/li\u003e\n\u003cli\u003eOE exact comparison rating for direct replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAbout the DriveAlign Premium OE Automatic Belt Tensioner Line\u003c\/h2\u003e\u003cp\u003eThe DriveAlign Premium OE Automatic Belt Tensioner product line by Gates focuses on delivering original equipment quality and fitment. This line is designed to meet or exceed factory specifications, providing consistent belt tension to prevent slippage and premature wear. The 39400 tensioner assembly is part of this line, offering precise engineering and materials that align with the demands of BMW and Mini accessory drive systems.\u003c\/p\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis accessory drive belt tensioner assembly features a thermoplastic body that balances strength and lightweight properties. The single pulley included has a smooth backside contact surface, optimized for V-ribbed belts commonly used in BMW and Mini vehicles. With two mounting holes, the tensioner ensures a secure fit and stable operation. The bearing bore inside diameter measures 0.67 inches (17 mm), supporting smooth rotation and reducing friction. The outside diameter of 2.56 inches (65 mm) and width of 1.02 inches (26 mm) are designed to match OEM specifications, making the Gates 39400 a reliable replacement part for maintaining proper belt tension and alignment.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper tension to V-ribbed accessory drive belts\u003c\/li\u003e\n\u003cli\u003eEliminates belt slippage and associated noise\u003c\/li\u003e\n\u003cli\u003ePrevents premature belt wear and damage\u003c\/li\u003e\n\u003cli\u003eCorrects misalignment issues in the belt drive system\u003c\/li\u003e\n\u003cli\u003eSupports smooth operation of engine accessories such as alternator and power steering pump\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Gates DriveAlign Premium OE Automatic Belt Tensioner 39400, ensure the mounting surface is clean and free of debris. Verify the tensioner aligns correctly with the V-ribbed belt path on BMW Cooper, Cooper Clubman, Cooper Countryman, Cooper Paceman, X1, and X2 models. Use appropriate tools to secure the two mounting bolts firmly without over-tightening. After installation, inspect belt tension and pulley alignment to confirm proper operation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eThe Gates DriveAlign Premium OE Automatic Belt Tensioner 39400 is manufactured to meet original equipment standards, providing consistent performance and durability. This part carries an OE exact comparison rating, ensuring it matches factory specifications for fit and function. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed quality assurance to support reliability in automotive applications.\u003c\/p\u003e","brand":"Gates","offers":[{"title":"Default Title","offer_id":52138090234037,"sku":"BBSC-39400","price":154.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ZO_39400_Fro.jpg?v=1775231902","url":"https:\/\/www.partcatalog.com\/products\/gates-39400-accessory-drive-belt-tensioner-assembly","provider":"PartCatalog","version":"1.0","type":"link"}