Gates 39331 Accessory Drive Belt Tensioner Assembly

OE Automatic Belt Tensioner for Honda and Acura

The Gates DriveAlign Premium OE Automatic Belt Tensioner, part number 39331, is built for accessory drive belt systems that require consistent belt control and OE-style fit. It is engineered with a steel housing, a smooth/backside pulley, and a hydraulic damper to help maintain proper belt tension in service.

Compatible With select Acura RLX, TLX, RDX, MDX and Honda Accord and Crosstour applications, this tensioner is made to match OE fit, form, and function. If you are replacing a worn accessory drive belt tensioner on a Honda Accord or Acura TLX, Gates 39331 provides a direct-fit service part for the V-ribbed belt system.

Key Features

• Gates DriveAlign Premium OE Automatic Belt Tensioner
• Part number 39331
• Steel construction for durability
• Hydraulic damper included in the assembly
• Single smooth/backside pulley for V-ribbed belts
• OE Exact comparison rating for OE-style fit and function
• Two mounting holes for secure installation
• Designed for accessory drive belt system service

Product Details

Gates draws on original equipment system design experience to produce premium DriveAlign automatic belt tensioners with rigid manufacturing tolerances. This tensioner assembly is built around a 3-inch (76.2 mm) outside diameter pulley, 1.22-inch (31 mm) width, and 17 mm bearing bore inside diameter. The smooth pulley contact surface is suited for the backside of a V-ribbed belt, helping the belt system maintain stable operation under changing engine loads.

This part cross-references Continental 49820 for the same application. Gates 39331 is a practical OE-style replacement when servicing the accessory drive belt system on Acura and Honda vehicles.

Common Problems This Part Can Address

• Belt squeal from weak or inconsistent tension
• Visible belt flutter or vibration at idle
• Accessory drive belt tracking issues
• Noise from a worn tensioner pulley or damper
• Loss of proper belt tension in the drive system

Installation Notes and Tips

Verify belt routing and inspect the accessory drive belt, idler pulleys, and adjacent components before installation. Confirm the mounting points and pulley alignment match the original tensioner, and replace the belt if wear, glazing, or cracking is present. For best results, compare the original unit to Gates 39331 before final assembly.

Fits 2014-2020 Acura RLX, N/A; 2015-2020 Acura TLX, N/A; 2016-2018 Acura RDX, N/A; 2014-2016 Acura MDX, N/A; 2013-2017 Honda Accord, N/A; 2013-2015 Honda Crosstour, N/A.

Quality Assurance

Gates manufactures this DriveAlign Premium OE Automatic Belt Tensioner to rigid tolerances and specifications to support OE fit, form, and function. The part is built as an OE Exact replacement for the listed applications.