Roadmax 5K420AP Serpentine Belt

Roadmax 5K420AP Serpentine Belt Overview

The Roadmax 5K420AP is a standard automotive V-ribbed serpentine belt built with EPDM rubber and polyester cord reinforcement for everyday accessory drive service. It is sized for 5-rib applications and is a practical choice for budget-conscious repairs that still require dependable belt construction.

Roadmax’s Automotive V-Ribbed Belt (Standard) line focuses on straightforward replacement coverage for common accessory drive systems. The 5K420AP follows that approach with a standard-duty design for vehicles that need a direct-fit serpentine belt without stepping up to a premium performance belt.

Key Features

• EPDM belt material for modern accessory drive durability
• Polyester cord construction for stable belt reinforcement
• 5-rib cross section for compatible serpentine drive systems
• Top width: 17 mm (.667 in.)
• Effective length: 1070 mm (42.12 in.)
• Outside circumference: 1083 mm (42.625 in.)
• Standard-duty Roadmax replacement belt

Detailed Description

Roadmax 5K420AP serpentine belt applications include older Ford, Mazda, Mercury, Honda, Toyota, Chevrolet, Pontiac, and Mitsubishi models that use a 5-rib accessory drive layout. This part number is commonly referenced for vehicles such as the Ford Taurus, Mazda 626, and Honda Prelude, along with other listed applications that require the same belt dimensions and rib count. This part cross-references Gates K050420 and Dayco 5050420 for the same application.

Use the 5K420AP when you need a standard automotive V-ribbed belt with the correct length, rib profile, and material specification for the listed accessory drive systems. The EPDM construction is suited to routine engine-bay heat exposure, while the polyester cord helps maintain belt stability in service.

What This Belt Helps Address

• Squealing or chirping from a worn serpentine belt
• Cracking, glazing, or visible wear on the belt ribs
• Loss of accessory drive performance on the alternator, power steering, air conditioning, or water pump circuits listed in fitment
• Incorrect belt length after a previous replacement
• Fitment issues on 5-rib accessory drive systems

Installation Notes and Fitment

• Fits 1997-1999 Mitsubishi Mirage, power steering and air conditioning
• Fits 1994-1996 Honda Prelude, alternator and air conditioning
• Fits 1989-1992 Ford Probe, air conditioning and power steering
• Fits 1988-1992 Ford Taurus, water pump and alternator
• Fits 1990-1992 Mazda 626, power steering and air conditioning, w/5-ribbed belt
• Fits 1990-1992 Mazda MX-6, power steering and air conditioning, w/5-ribbed belt
• Fits 1989-1992 Mercury Sable, water pump and alternator
• Fits 1988-1989 Mazda 626, power steering and air conditioning
• Fits 1983-1985 Mazda 626, power steering and air conditioning
• Fits 1988-1989 Mazda MX-6, power steering and air conditioning
• Fits 1988 Chevrolet Nova, power steering and air conditioning
• Fits 1988 Mercury Sable, alternator and water pump
• Fits 1985-1988 Toyota Corolla, power steering and air conditioning
• Fits 1987 Chevrolet Camaro, water pump and alternator
• Fits 1987 Ford Taurus, water pump and alternator, w/5-ribbed belt
• Fits 1987 Mercury Sable, water pump and alternator, w/5-ribbed belt
• Fits 1987 Pontiac Firebird, water pump and alternator
• Fits 1985 Ford Escort, alternator and air conditioning, w/dealer installed A.C., early
• Fits 1985 Mercury Lynx, alternator and air conditioning, w/dealer installed A.C., early
• Fits 1983-1984 Ford Escort, alternator and air conditioning, w/dealer installed A.C.
• Fits 1983-1984 Mercury Lynx, alternator and air conditioning, w/dealer installed A.C.
• Fits 1983 Mercury LN7, alternator and air conditioning, w/dealer installed A.C.
• Fits 1981-1982 Ford Escort, alternator and air conditioning, w/dealer installed A.C., w/o Sankyo A.C. compressor
• Fits 1982 Mercury LN7, alternator and air conditioning, w/dealer installed A.C., w/o Sankyo A.C. compressor
• Fits 1981-1982 Mercury Lynx, alternator and air conditioning, w/dealer installed A.C., w/dealer installed A.C., w/o Sankyo A.C. compressor

Before installation, confirm the belt routing, rib count, and measured length against the existing belt or service information for your vehicle. This is especially important on older Ford Taurus, Mazda 626, and Honda Prelude applications where accessory-drive configurations can vary by engine and equipment package.

Quality Assurance

Roadmax positions this belt as a standard replacement option for customers who want quality construction without the added cost of a premium belt. The EPDM compound and polyester cord specification support consistent everyday service in the listed applications.