Dayco 5040343 Serpentine Belt

Dayco 5040343 Serpentine Belt Overview

The Dayco 5040343 serpentine belt is a K-section accessory drive belt built with EPDM and aramid reinforcement for consistent operation across a wide temperature range. With a 4-rib, straight-rib profile and deep rib design, it is suited for accessory drive applications that demand stable grip and reliable belt tracking.

Compatible With select Honda Civic, Toyota Tacoma, BMW X5, Mazda RX-8, and other listed applications, this belt is a direct-fit option for air conditioning, idler, power steering, alternator, and water pump drive positions where specified.

Key Features

• Part number: 5040343
• EPDM construction with aramid reinforcement for durability
• 4-rib K-section design with straight ribs and deep rib profile
• Black finish
• Effective length: 34.25 in. (869.95 mm)
• Outside circumference: 34.91 in. (886.72 mm)
• Top width: 0.54 in.
• Operating temperature range: -45 to 212 degrees F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5040343 is an accessory drive serpentine belt engineered for vehicles that use a compact 4-rib belt profile. The EPDM rubber compound helps maintain flexibility and wear resistance, while aramid reinforcement adds strength for demanding accessory loads. This belt measures 34.25 inches in effective length and 34.91 inches in outside circumference, making it a precise replacement for listed applications that require this size and rib configuration.

This part cross-references Gates K040343 for the same application. It is listed for vehicles including 1990-1991 Honda Civic, 1995-2004 Toyota Tacoma, and 2007-2010 BMW X5, along with additional Acura, Toyota, Mazda, Hyundai, Mitsubishi, Geo, and Dodge applications shown in the fitment data. Use the exact year, make, model, and accessory position to confirm the correct belt before installation.

What This Belt Helps Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or fraying on the existing belt surface
• Loss of belt grip on alternator, A/C, idler, or power steering drives
• Incorrect belt length after previous replacement
• Accessory drive noise caused by belt wear or age

Installation Notes and Tips

Verify the belt path, rib count, and measured length against the vehicle application before installation. Confirm whether the vehicle uses the air conditioning and idler, power steering, alternator, or water pump position listed in the fitment data. Inspect pulleys, tensioners, and idlers for wear or misalignment before fitting the new belt, since damaged components can shorten belt life.

Fits 2009-2011 Mazda RX-8, Air Conditioning and Idler. Fits 2007-2010 BMW X5, Air Conditioning. Fits 1995-2004 Toyota Tacoma, Air Conditioning and Idler. Fits 1996-2002 Toyota 4Runner, Air Conditioning and Idler. Fits 1994-2001 Acura Integra, Air Conditioning and Idler. Fits 1994-1998 Toyota T100, Air Conditioning and Idler. Fits 1994-1997 Geo Prizm, Air Conditioning and Idler. Fits 1994-1997 Toyota Corolla, Air Conditioning and Idler. Fits 1994-1995 Honda Civic del Sol, Power Steering. Fits 1990-1994 Hyundai Excel, Alternator and Water Pump. Fits 1990-1994 Mitsubishi Precis, Alternator and Water Pump. Fits 1991-1992 Hyundai Scoupe, Alternator and Water Pump. Fits 1990-1991 Honda Civic, Air Conditioning and Idler, 34 1/4 In. Belt. Fits 1990-1991 Honda Civic, Air Conditioning and Idler, 34 3/4 In. Belt. Fits 1990-1991 Honda CRX, Air Conditioning and Idler, 34 1/4 In. Belt. Fits 1991 Honda CRX, Air Conditioning and Idler, Matsushita Comp. Fits 1988-1989 Honda CRX, Air Conditioning and Idler, Matsushita Comp. Fits 1989 Dodge Colt, Alternator and Water Pump. Fits 1988-1989 Honda Civic, Air Conditioning and Idler, Matsushita Comp. Fits 1987-1988 Mitsubishi Mirage, Alternator and Water Pump. Fits 1986-1987 Mazda 626, Alternator, w/o P.S., w/o A.C.

Quality Assurance

Dayco manufactures accessory drive components to SAE J1459 and SAE J2432 standards, supporting consistent fit and material performance across the listed applications. The 5040343 part number is used for direct replacement matching in the specified vehicle and accessory configurations.