Gates 39521 Accessory Drive Belt Tensioner Assembly

OE Automatic Belt Tensioner for Hyundai and Kia

Gates DriveAlign Premium OE Automatic Belt Tensioner 39521 is built for accessory drive belt systems that need consistent belt tension and OE-style fit. It is a direct-fit tensioner assembly for select Hyundai and Kia applications, including Sonata, Tucson, Santa Fe Sport, Sorento, Sportage, and Sportage models listed below.

Gates applies OE system design experience to the DriveAlign Premium OE Automatic Belt Tensioner line, with manufacturing held to rigid tolerances for fit, form, and function. Part number 39521 uses a thermoplastic housing, a single mounting hole, and a V-ribbed belt pulley with a smooth backside surface for the specified accessory drive belt setup.

Key Features

• Accessory drive belt tensioner assembly for OE-style replacement
• Thermoplastic construction
• OE Performance grade
• Single-pulley design with smooth/backside pulley surface
• V-ribbed belt application
• Direct-fit replacement for select Hyundai and Kia vehicles
• Part number 39521

DriveAlign Premium OE Line Details

The Gates DriveAlign Premium OE Automatic Belt Tensioner line is engineered for applications that require accurate belt control and consistent operation. For 39521, that means a tensioner assembly manufactured to OE-level specifications so it matches the original belt system layout on the listed Hyundai and Kia vehicles. This part cross-references Hyundai/Kia OE number 252812G000 for the same application.

Vehicle Fitment

• Fits 2015-2016 Hyundai Santa Fe Sport, N/A
• Fits 2016 Kia Sportage, N/A
• Fits 2015 Hyundai Sonata, N/A
• Fits 2015 Hyundai Tucson, N/A
• Fits 2014-2015 Kia Sorento, N/A; Apr. 2, 2014 & newer
• Fits 2015 Kia Sportage, N/A; Sept. 23, 2014 & after
• Fits 2014 Hyundai Sonata, N/A; Apr. 2, 2014 & newer
• Fits 2014 Hyundai Tucson, N/A; Oct. 1, 2014 & newer

What This Part Helps Address

• Belt noise caused by a worn or weak tensioner
• Uneven accessory belt tension
• Belt flutter or vibration in the accessory drive system
• Loss of proper belt tracking on the V-ribbed belt path
• Replacement needs for a worn OE-style tensioner assembly

Installation Notes and Tips

Confirm the vehicle build date notes before ordering, especially for 2014-2015 Kia Sorento, 2015 Kia Sportage, 2014 Hyundai Sonata, and 2014 Hyundai Tucson applications. Match the belt type, pulley style, and mounting layout to the original part before installation. Verify accessory drive belt condition during service and inspect related pulleys for wear.

Quality Assurance

Gates manufactures DriveAlign Premium OE Automatic Belt Tensioners to rigid tolerances and specifications for OE fit, form, and function. Part number 39521 is built as an OE-performance replacement for the listed Hyundai and Kia applications.