Dayco 5030300 Serpentine Belt - Alternator or Power Steering

Dayco 5030300 Serpentine Belt Overview

The Dayco 5030300 serpentine belt is a K-section accessory drive belt built for select Toyota, Honda, Mazda, Ford, and Lexus applications. It uses EPDM construction with aramid reinforcement for dependable belt tracking, stable tension, and consistent operation in power steering and alternator drives.

With a 3-rib, straight-rib profile and deep rib design, this Dayco serpentine belt is sized for compact accessory drive systems that require accurate fitment and reliable grip. The 5030300 is a direct replacement option for vehicles such as the Toyota Camry, Toyota Celica, Honda Civic, and Mazda 626.

Key Features

• EPDM rubber construction with aramid reinforcement for durability
• 3-rib K-section design for select accessory drive systems
• Black belt with straight rib profile and deep rib geometry
• Effective length: 30.00 in. / 762.00 mm
• Outside circumference: 30.66 in. / 778.77 mm
• Top width: 0.40 in.
• Operating temperature range: -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5030300 is engineered as a serpentine belt for accessory drive belt system components where compact sizing and consistent rib engagement matter. The EPDM compound is paired with aramid reinforcement to help maintain belt integrity under heat and cold cycling, while the straight-rib, deep-rib profile supports stable contact across the pulley system. This makes it a practical replacement for power steering and alternator applications across a range of import and domestic vehicles.

Fits 1983-1991 Toyota Camry, Power Steering. Fits 1986-1999 Toyota Celica, Power Steering. Fits 1988-1991 Honda Civic, Alternator. Fits 1988-1991 Honda CRX, Alternator. Fits 1988-1992 Mazda 626, Alternator. Fits 1988-1992 Mazda MX-6, Alternator. Fits 1989-1992 Ford Probe, Alternator. Fits 1990-1991 Lexus ES250, Power Steering. Fits 1992 Toyota Camry, Power Steering, Japan Built, To 03/1992. Fits 1996-2000 Toyota RAV4, Power Steering.

This part cross-references Gates K030300 and Bando 3PK760 for the same application.

What It Helps Address

• Squealing or slipping accessory drive belt noise
• Loss of power steering assist caused by belt wear or stretch
• Alternator drive issues related to cracked or glazed belts
• Rib separation, fraying, or surface checking on the existing belt
• Incorrect belt length or profile during replacement service

Installation Notes and Tips

Verify the belt profile, rib count, and effective length before installation. Confirm whether the vehicle uses the power steering or alternator position listed in the fitment data, and compare the old belt routing to the service diagram before removal. Inspect pulleys, tensioners, and idlers for wear or misalignment so the new belt can track correctly.

Quality Assurance

This Dayco belt is manufactured to SAE J1459 and SAE J2432 standards for accessory drive belt applications. The EPDM and aramid-reinforced construction is specified to support consistent performance across the stated operating temperature range.