Dayco 89166 Accessory Drive Belt Idler Pulley - Power Steering

Dayco 89166 Accessory Drive Belt Idler Pulley

The Dayco 89166 accessory drive belt idler pulley is a steel, flat-style serpentine pulley built for accessory drive belt routing in select Ford and Mazda applications. It is specified for power steering positions and matches common OE-style dimensions for service on vehicles such as the Mazda 626, Mazda Millenia, Ford Probe, Mazda MX-6, and Mazda MX-3.

Key Features

• Steel pulley construction for durable accessory drive service
• Flat pulley design for serpentine belt routing
• Fits up to 4-rib serpentine belts
• Single-bearing design with 17 mm inner diameter and 12 mm bearing width
• Position-specific application for power steering systems
• Dayco 89166 replacement part for select Mazda and Ford vehicles

Detailed Description

Dayco 89166 is an accessory drive belt idler pulley engineered for power steering belt applications where a flat serpentine pulley is required. The steel body and single-bearing construction are sized for controlled belt tracking and consistent rotation in accessory drive systems. This part is a direct-fit service option for 1993-2002 Mazda 626 power steering, 1995-2002 Mazda Millenia power steering, 1993-1997 Ford Probe power steering, 1993-1997 Mazda MX-6 power steering, and 1992-1994 Mazda MX-3 power steering. This part cross-references Gates 36229 for the same application.

Common Issues This Part Can Address

• Noise from a worn or rough idler pulley bearing
• Belt misalignment in the accessory drive system
• Serpentine belt tracking problems at the power steering drive
• Visible pulley wear, wobble, or surface damage
• Reduced belt smoothness during engine operation

Installation Notes and Tips

Verify pulley style, belt width, and bearing dimensions before installation. Confirm the vehicle’s power steering belt routing matches the flat, 4-rib serpentine specification. For best results, inspect the belt and adjacent accessory drive components for wear before returning the vehicle to service. Fits 1993-2002 Mazda 626, power steering. Fits 1995-2002 Mazda Millenia, power steering. Fits 1993-1997 Ford Probe, power steering. Fits 1993-1997 Mazda MX-6, power steering. Fits 1992-1994 Mazda MX-3, power steering.

Quality Assurance

Dayco is a recognized name in accessory drive components, and the 89166 pulley is built to meet the dimensional and material requirements listed for the application. Use the confirmed fitment data to match the correct vehicle, engine accessory routing, and power steering position before ordering.