Dayco 89050 Accessory Drive Belt Idler Pulley - Air Conditioning or Front

Accessory Drive Belt Idler Pulley Overview

The Dayco 89050 accessory drive belt idler pulley is a steel serpentine belt component built for vehicles that use a 4-rib belt path. It supports smooth belt routing and consistent belt tracking in accessory drive systems on applications such as Mazda Miata, Hyundai Sonata, and Isuzu Rodeo.

Use this Dayco 89050 pulley when replacing a worn or noisy idler in a serpentine belt system. It is listed for multiple OE-style applications and cross-references common aftermarket and OE part numbers for the same use case.

• Steel pulley construction
• 4-groove design for 4-rib serpentine belts
• Single bearing design
• Bearing inner diameter: 15 mm
• Bearing width: 13 mm
• Max belt width: 04 rib

Fitment and Application Details

Compatible With select Mazda Miata, Hyundai Sonata, Kia Sportage, Ford Aspire, Honda Passport, Isuzu Rodeo, Isuzu Trooper, Acura SLX, Mazda Protege, Mazda 323, Kia Sephia, Hyundai Elantra, and Mazda 323 applications listed below. Fits 2001-2003 Mazda Miata, N/A, w/o P.S., w/A.C.; Fits 1999-2000 Mazda Miata, N/A, Without power steering and with air conditioning; Fits 1991-1997 Mazda Miata, N/A, Without power steering and with air conditioning; Fits 1990 Mazda Miata, N/A; Fits 1992-1998 Hyundai Sonata, N/A; Fits 2002 Kia Sportage, N/A; Fits 1996-1997 Acura SLX, N/A; Fits 1994-1997 Ford Aspire, N/A, Serpentine Belt for vehicles with Factory Air; Fits 1994-1997 Honda Passport, Front; Fits 1993-1997 Isuzu Rodeo, Air Conditioning; Fits 1992-1997 Isuzu Trooper, Air Conditioning; Fits 1994-1997 Kia Sephia, N/A, Without power steering and with air conditioning; Fits 1995-1996 Mazda Protege, N/A, w/A.C., Early; Fits 1992-1995 Hyundai Elantra, N/A; Fits 1992-1994 Mazda 323, N/A; Fits 1990-1994 Mazda Protege, N/A, Without power steering and with air conditioning; Fits 1990-1991 Mazda 323, N/A, Without power steering and with air conditioning.

What This Pulley Helps Address

• Squealing or chirping from a worn idler pulley bearing
• Belt misalignment in a serpentine drive system
• Uneven belt tracking on 4-rib accessory drive setups
• Excessive pulley wobble or rough rotation
• Accessory drive noise on Mazda Miata, Hyundai Sonata, and Isuzu applications

Installation Notes and Tips

Verify belt type, groove count, and bearing dimensions before installation. This pulley is specified for serpentine belt systems with a 4-rib belt width and a single bearing layout. Confirm the vehicle configuration carefully, especially on Mazda Miata, Ford Aspire, and Kia Sephia applications where power steering, air conditioning, and factory air notes affect fitment.

Cross-reference part numbers include Gates 36099 and ACDelco 36099 for the same application.

Quality Assurance

Dayco supplies accessory drive components for OE-style replacement needs, and this pulley is built with steel construction and application-specific dimensions to match listed fitments. Part number 89050 is cataloged for direct replacement use in the vehicles shown above.