Dayco 5040420 Serpentine Belt

Dayco 5040420 Serpentine Belt Overview

The Dayco 5040420 serpentine belt is a 4-rib accessory drive belt built with EPDM and aramid reinforcement for dependable operation in belt-driven engine accessory systems. It is sized at 42.00 in. effective length with a 42.66 in. outside circumference, making it a direct-fit option for select vehicles that use a K-section, straight-rib belt profile.

Use this Dayco 5040420 belt when servicing accessory drive systems on applications such as the Chevrolet Corvette, Toyota Tacoma, Toyota Tundra, and Honda Accord. It is engineered to meet SAE J1459 and SAE J2432 standards and is specified for a wide operating temperature range.

Key Features

• EPDM construction with aramid reinforcement for durability in accessory drive service
• 4-rib, K-section design with straight rib profile
• 42.00 in. effective length and 42.66 in. outside circumference
• Black belt finish with standard rib depth
• Rated for temperatures from -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Product Description

This serpentine belt is intended for vehicles that rely on a compact 4-rib accessory drive layout. The EPDM rubber compound helps maintain belt performance under heat and cold cycling, while aramid reinforcement adds strength for consistent tension transfer across the drive system. If you are replacing a worn belt on a Toyota Tacoma, Toyota Tundra, or Chevrolet Corvette, the Dayco 5040420 provides the correct belt format for listed applications.

This part cross-references Gates K040420 and ACDelco 4K420 for the same application.

What This Belt Helps Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or visible wear on the belt surface
• Loss of drive to accessories such as the alternator, power steering, fan, or air conditioning
• Incorrect belt length after a previous replacement
• Reduced belt stability in high-heat or cold-weather operation

Installation Notes and Fitment

Verify belt routing, rib count, and measured length before installation. This Dayco 5040420 serpentine belt fits 1998-2004 Chevrolet Corvette, Air Conditioning; 1995-2004 Toyota Tacoma, Fan and Power Steering; 2000-2004 Toyota Tundra, Fan and Power Steering; 1996-2002 Toyota 4Runner, Fan and Power Steering; 1995-1998 Toyota T100, Fan and Power Steering; 1994-1996 Mitsubishi Montero, Water Pump To Power Steering; 1991-1993 Honda Accord, Power Steering; 1990 Honda Accord, Power Steering; 1987 Ford Taurus, Water Pump and Alternator; 1987 Mercury Sable, Water Pump and Alternator; 1986 Ford Taurus, Alternator and Water Pump; 1986 Mercury Sable, Alternator and Water Pump.

For Honda Accord, Toyota Tacoma, and Toyota Tundra applications, confirm the accessory drive configuration matches the listed position before ordering. The part number 5040420 is also referenced in OE and aftermarket catalogs for select 4-rib belt applications.

Quality Assurance

Dayco manufactures this belt to recognized SAE standards for accessory drive service and uses EPDM with aramid reinforcement to support long-term belt performance across a wide temperature range.