Gates 39401 Accessory Drive Belt Tensioner Assembly - Alternator

OE Automatic Belt Tensioner for Hyundai and Kia

Gates DriveAlign Premium OE Automatic Belt Tensioner 39401 is built for accessory drive belt systems that need consistent belt control and OE-style fit. It is a steel tensioner assembly with a V-ribbed belt application, a single smooth/backside pulley, and rigid manufacturing tolerances for accurate form and function.

Use this Gates 39401 tensioner when servicing Hyundai Sonata, Santa Fe Sport, Tucson, and Kia Optima, Sorento, Sportage, or Santa Fe applications that call for a premium automatic belt tensioner assembly.

Key Features

• OE Performance grade automatic belt tensioner assembly
• Steel construction for accessory drive belt system service
• Single smooth/backside pulley for V-ribbed belt routing
• 2 mounting holes for direct-fit installation
• 17 mm bearing bore inside diameter
• 65 mm outside pulley diameter and 29.5 mm pulley width
• Built to Gates OE specifications for fit, form, and function

Product Details

The Gates DriveAlign Premium OE Automatic Belt Tensioner line brings OE system design experience to replacement parts for the accessory drive belt system. This tensioner is engineered to maintain proper belt tension and pulley alignment in vehicles that rely on a V-ribbed belt layout. The Gates 39401 is a direct replacement style part for select Hyundai and Kia models, including 2016-2020 Kia Optima, 2017-2020 Kia Sorento, 2017-2022 Kia Sportage, 2016-2019 Hyundai Sonata, 2017-2018 Hyundai Santa Fe Sport, 2019-2020 Hyundai Santa Fe, and 2018-2021 Hyundai Tucson applications listed in the fitment data.

This part cross-references Litens 999668A for the same application.

Common Problems This Part Can Address

• Belt squeal caused by weak or inconsistent tension
• Accessory belt flutter or vibration
• Misalignment issues in the drive belt system
• Premature belt wear from poor pulley control
• Noise from a worn automatic tensioner assembly

Installation Notes and Tips

Verify the vehicle’s engine accessory drive layout, belt type, and mounting configuration before installation. Confirm the correct application by year, make, model, and position, since fitment includes N/A and Alternator listings depending on the vehicle. Inspect the belt, idler pulleys, and related accessory drive components during service so the new tensioner can operate within a clean, properly aligned system.

Quality Assurance

Gates manufactures DriveAlign Premium OE Automatic Belt Tensioners to rigid tolerances and specifications to support OE fit, form, and function. The 39401 is produced as an OE-performance replacement for select Hyundai and Kia accessory drive belt systems.