Dayco 89688 Accessory Drive Belt Tensioner Assembly

Dayco 89688 Accessory Drive Belt Tensioner Assembly

Dayco 89688 is an automatic accessory drive belt tensioner assembly for serpentine belt systems. It is built for clockwise rotation and uses a single pulley to maintain proper belt tension in the accessory drive system.

Key Features

• Automatic accessory drive belt tensioner assembly
• Serpentine belt application
• Clockwise rotation
• Single pulley design
• Pulley 1 diameter: 80 mm
• Pulley 1 width: 22.5 mm
• Pulley 1 flat: yes
• Dayco part number 89688

Detailed Description

This Dayco accessory drive belt tensioner assembly is specified for vehicles using a serpentine belt layout and an automatic tensioning system. The 80 mm pulley with a 22.5 mm width and flat pulley profile supports consistent belt tracking in the accessory drive belt system. Compatible With 2014-2022 Toyota Corolla, 2017-2018 Toyota Corolla iM, 2018-2022 Toyota C-HR, and 2016 Scion iM. If you are replacing a worn Dayco 89688 tensioner on a Toyota Corolla or Toyota C-HR, this assembly matches the listed application data for direct service use.

What It Helps Address

• Serpentine belt noise caused by weak or inconsistent tension
• Belt slippage in the accessory drive system
• Visible belt misalignment or tracking issues
• Reduced tensioner response from wear over time
• Accessory drive belt vibration during engine operation

Installation Notes and Tips

Verify belt routing, pulley alignment, and clockwise rotation before installation. Inspect the serpentine belt, idler pulleys, and related accessory drive components at the same time to avoid repeat service. Confirm the vehicle application against the listed fitment for 2014-2022 Toyota Corolla, 2017-2018 Toyota Corolla iM, 2018-2022 Toyota C-HR, and 2016 Scion iM. Dayco 89688 should be installed only on the confirmed serpentine belt application shown here.

Quality Assurance

Dayco is a recognized name in accessory drive components, and this tensioner assembly is built to the listed OE-style specifications for the confirmed applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.