Dayco 89025 Accessory Drive Belt Idler Assembly

Accessory Drive Belt Idler for Ford Applications

Dayco 89025 is an accessory drive belt idler assembly built with a steel body and a single bearing for V-belt systems. It is listed for Ford, Lincoln, and Mercury applications that use factory air or dealer air configurations, including classic Ford Mustang, Bronco, F-Series, and Econoline models.

Use Dayco 89025 when you need a direct replacement idler assembly for accessory drive belt routing on select Ford vehicles. The part number 89025 is also referenced in aftermarket catalogs under several cross-reference numbers for the same application.

Key Features

• Steel construction for durable belt support
• Accessory drive belt idler assembly for V-belt systems
• Single-bearing design
• Bearing inner diameter: 17 mm
• Bearing width: 12 mm
• Maximum belt width: 1/2 in.
• Fits applications with factory air or dealer air, depending on vehicle listing
• Dayco part number 89025

Detailed Product Overview

This Dayco accessory drive belt idler assembly is designed for vehicles that use a V-belt accessory drive layout. The steel housing and single-bearing construction provide the support needed to maintain belt alignment and routing across the accessory drive system. With a maximum belt width of 1/2 inch, Dayco 89025 is listed for a wide range of Ford, Lincoln, and Mercury vehicles from 1969 through 1987, including Ford E-150 Econoline, F-150, Bronco, Mustang, and Thunderbird applications.

Fits 1975-1987 Ford E-150 Econoline, N/A. Fits 1975-1987 Ford E-150 Econoline Club Wagon, N/A. Fits 1975-1987 Ford E-250 Econoline, N/A. Fits 1975-1987 Ford E-250 Econoline Club Wagon, N/A. Fits 1975-1987 Ford E-350 Econoline, N/A. Fits 1977-1987 Ford E-350 Econoline Club Wagon, N/A. Fits 1985-1987 Ford Mustang, N/A. Fits 1978-1986 Ford Bronco, N/A. Fits 1976-1986 Ford F-150, N/A. Fits 1977-1986 Ford F-250, N/A. Fits 1976-1986 Ford F-350, N/A. Fits 1984-1985 Ford LTD, N/A. Fits 1970-1978 Ford LTD, N/A. Fits 1983-1984 Ford Ranger, N/A. Fits 1970-1983 Ford E-100 Econoline, N/A. Fits 1975-1983 Ford E-100 Econoline Club Wagon, N/A. Fits 1975-1983 Ford F-100, N/A. Fits 1980-1981 Ford Thunderbird, N/A. Fits 1978-1980 Lincoln Versailles, N/A. Fits 1980 Mercury Marquis, N/A. Fits 1980 Mercury Monarch, N/A. Fits 1975-1977 Mercury Monarch, N/A. Fits 1978-1979 Ford Fairmont, N/A. Fits 1970-1979 Mercury Cougar, N/A. Fits 1979 Mercury Zephyr, N/A. Fits 1978 Mercury Zephyr, N/A. Fits 1970-1977 Lincoln Continental, N/A. Fits 1970-1976 Mercury Montego, N/A. Fits 1969-1973 Ford Mustang, N/A. Fits 1973 Mercury Colony Park, N/A. Fits 1973 Mercury Marquis, N/A. Fits 1970-1972 Ford Thunderbird, N/A.

This part cross-references Gates 38039 and ACDelco 38039 for the same application.

Common Problems This Part Can Address

• Worn or noisy idler bearing in the accessory drive system
• Belt tracking issues caused by a damaged idler assembly
• Accessory belt vibration or uneven belt movement
• Loss of proper belt routing on V-belt setups
• Service replacement for aging factory air belt drive components

Installation Notes and Tips

Verify the belt type, bearing dimensions, and vehicle configuration before installation. This listing is for V-belt applications and includes fitment notes for vehicles with factory air or dealer air where specified. Confirm the accessory drive layout on your Ford, Lincoln, or Mercury model against the vehicle listing before ordering.

Quality Assurance

Dayco is a recognized name in accessory drive components, and part 89025 is cataloged with defined material and bearing specifications for application matching. Use the listed fitment and dimensions to confirm the correct replacement for your vehicle.