Dayco 89565 Accessory Drive Belt Idler Pulley - Right, Right Lower or Upper

Dayco 89565 Accessory Drive Belt Idler Pulley

Dayco 89565 is a steel accessory drive belt idler pulley for serpentine belt systems. It is built with one bearing, a 17 mm bearing inner diameter, and a 14 mm bearing width for use in accessory drive applications that require a smooth pulley surface.

Key Features

• Steel pulley construction for accessory drive belt service
• Serpentine belt type with a flat, smooth face
• One bearing design with 17 mm inner diameter and 14 mm width
• Maximum belt width: 10 rib
• Direct fitment for select Ford Mustang supercharger belt applications
• Dayco part number 89565

Detailed Description

This Dayco accessory drive belt idler pulley is specified for smooth serpentine belt routing and belt guidance in select Ford Mustang applications. The steel construction supports consistent belt tracking, while the single-bearing design is suited to pulley positions that require a smooth, non-grooved contact surface. Compatible With 2007-2011 Ford Mustang, upper; 2012 Ford Mustang, right; 2013 Ford Mustang, right lower; and 2014 Ford Mustang, right. Dayco 89565 is also listed for 2012-2016 Ford F-150 3.5L V6 Turbo-related smooth belt applications noted in the fitment data.

What It Helps Address

• Noise from a worn or rough idler pulley bearing
• Belt tracking issues caused by pulley wear
• Serpentine belt vibration at the accessory drive system
• Uneven pulley surface wear in smooth-belt routing
• Loss of belt stability in supercharger belt applications

Installation Notes and Tips

Verify pulley position before ordering, since fitment includes upper, right, and right lower locations on select Mustang applications. Confirm the belt path, pulley diameter, and bearing dimensions against the original part before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Dayco is a recognized name in accessory drive components, and this pulley is built to match the dimensional requirements listed for the confirmed applications. Review the vehicle fitment details carefully to ensure the correct position and belt type are selected for your Ford Mustang or related application.