Dayco 5040373 Serpentine Belt

Dayco 5040373 Serpentine Belt Overview

The Dayco 5040373 serpentine belt is built for accessory drive applications that demand stable grip, consistent routing, and dependable operation across a wide temperature range. It uses EPDM rubber with aramid reinforcement and a straight-rib K-section profile to support smooth power transfer in belt-driven systems.

Compatible With select INFINITI, Nissan, Hyundai, Kia, Mazda, Suzuki, Ford, Honda, Acura, Mitsubishi, Chevrolet, Geo, Pontiac, and Dodge applications, this belt is a direct-fit option for common accessory drive service needs. The Dayco 5040373 is also cross-referenced to Gates K040372 for the same application.

Key Features

• EPDM construction with aramid reinforcement for durability in accessory drive service
• 4-rib, K-section design with straight rib profile
• Black belt finish with .54 in. top width
• Effective length: 37.25 in. (946.15 mm)
• Outside circumference: 37.91 in. (962.92 mm)
• Operating temperature range from -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5040373 is a serpentine belt for accessory drive systems that route power to components such as the alternator, water pump, air conditioning compressor, idler, and power steering pump, depending on vehicle configuration. Its EPDM compound is paired with aramid reinforcement to help maintain belt stability under heat, cold, and continuous load. This makes it a practical replacement for vehicles such as the 2001-2006 Hyundai Santa Fe, 2003-2006 Nissan 350Z, 2004-2007 INFINITI G35, and 1999-2002 Mazda Miata.

Use this belt when servicing vehicles that call for a 4-rib, K-section belt with a 37.25-inch effective length. The Dayco 5040373 also appears in applications across INFINITI M45, Q45, FX35, FX45, M35, QX4, and G25 models, along with select Kia, Suzuki, Ford, Honda, Acura, Mitsubishi, Chevrolet, Geo, Pontiac, and Dodge vehicles.

What This Belt Helps Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the belt surface
• Loss of belt grip affecting alternator, A/C, or power steering operation
• Incorrect belt length or rib count during replacement service
• Heat-related belt deterioration in high-load engine bays

Installation Notes and Tips

Verify rib count, effective length, and belt routing against the vehicle’s original specification before installation. Confirm whether the application uses air conditioning, idler, power steering, alternator, or water pump drive routing, since fitment varies by engine and accessory layout. Inspect pulleys, tensioners, and idlers for wear before installing the new belt, and replace any damaged components that could affect belt tracking.

Fits 2001-2006 Hyundai Santa Fe, Alternator and Water Pump. Fits 2003-2006 Nissan 350Z, Air Conditioning and Idler. Fits 2004-2007 INFINITI G35, Air Conditioning and Idler. Fits 1999-2002 Mazda Miata, Air Conditioning and Power Steering.

Quality Assurance

Dayco manufactures this belt to SAE J1459 and SAE J2432 standards for accessory drive applications. The EPDM and aramid-reinforced construction supports consistent performance in demanding underhood conditions.