Dayco 5040385 Serpentine Belt

Dayco 5040385 Serpentine Belt Overview

The Dayco 5040385 serpentine belt is a K-section accessory drive belt built with EPDM rubber and aramid reinforcement for dependable operation across a wide temperature range. It is a 4-rib, black belt with a straight rib profile and deep rib design for accessory drive applications that require stable belt tracking.

Compatible With select Acura NSX, Mitsubishi Eclipse, Honda Prelude, Hyundai Elantra, and other listed applications, this belt is sized for specific power steering, alternator, water pump, air conditioning, and idler drive layouts. If you are replacing a worn serpentine belt on a 1991-2005 Acura NSX or a 1997-1999 Mitsubishi Eclipse, Dayco 5040385 is built to match the listed OE-style dimensions and routing requirements.

Key Features

• EPDM construction with aramid reinforcement for durability in accessory drive service
• 4-rib K-section profile for listed serpentine belt applications
• Effective length: 38.58 in. (979.94 mm)
• Outside circumference: 39.24 in. (996.70 mm)
• Top width: 0.54 in.
• Deep rib, straight rib profile for consistent belt engagement
• Operating temperature range: -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5040385 is a serpentine belt for accessory drive systems that need a 4-rib, K-section belt with a 38.58-inch effective length. The EPDM compound is paired with aramid reinforcement to support belt stability in demanding underhood conditions, while the deep rib construction and straight rib profile help maintain contact in routed drive systems. This makes it a practical replacement for vehicles such as the Acura NSX, Mitsubishi Eclipse, Honda Prelude, and Hyundai Elantra where the belt drives components including power steering, alternator, water pump, air conditioning, or idler assemblies depending on the application.

This part cross-references Gates K040384 and Bando 4PK975 for the same application.

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 proper drive to the alternator, water pump, or power steering system
• Belt slip caused by age, heat cycling, or contamination
• Incorrect belt length or rib count on listed vehicle applications

Installation Notes and Tips

Verify the belt routing, rib count, and measured length against the vehicle’s accessory drive layout before installation. Confirm the application position listed for your vehicle, since this belt is used in different drive locations such as air conditioning and idler, power steering, and alternator/water pump systems. Inspect pulleys, tensioners, and idlers for wear before installing the new belt to help prevent premature noise or tracking issues.

Quality Assurance

Dayco manufactures this belt to SAE J1459 and SAE J2432 standards, with material and dimensional specifications listed for the intended applications. Part number 5040385 is identified for direct reference when matching the correct belt to the vehicle fitment shown below.

Vehicle Fitment

• Fits 1991-2005 Acura NSX, Air Conditioning and Idler
• Fits 1996 Acura NSX, Power Steering
• Fits 1994 Acura NSX, Power Steering
• Fits 2001-2003 Chrysler Sebring, Power Steering
• Fits 2001-2003 Dodge Stratus, Power Steering
• Fits 1997-1999 Mitsubishi Eclipse, Alternator and Water Pump
• Fits 1997-1998 Mitsubishi Galant, Alternator and Water Pump
• Fits 1985-1987 Mitsubishi Galant, Alternator and Water Pump
• Fits 1994-1997 Ford Aspire, Air Conditioning and Idler, w/P.S., Dealer Air
• Fits 1992-1995 Hyundai Elantra, Alternator and Water Pump
• Fits 1994 Mercury Capri, Air Conditioning and Power Steering, Fits dealer air vehicles only
• Fits 1994 Mercury Capri, Air Conditioning and Power Steering, Serpentine Belt for vehicles with Factory Air
• Fits 1991-1993 Mercury Capri, Air Conditioning and Power Steering
• Fits 1991-1992 Mitsubishi Mirage, Alternator and Water Pump
• Fits 1989 Mitsubishi Mirage, Alternator and Water Pump
• Fits 1985-1991 Dodge Colt, Alternator and Water Pump
• Fits 1990-1991 Honda Prelude, Power Steering
• Fits 1988 Honda Prelude, Power Steering
• Fits 1989-1991 Hyundai Sonata, Alternator and Water Pump
• Fits 1987-1990 Mercury Tracer, Air Conditioning and Power Steering
• Fits 1989 Honda Prelude, Power Steering, Air Conditioning and Idler
• Fits 1987-1989 Mazda 323, Air Conditioning and Power Steering
• Fits 1985-1988 Mitsubishi Cordia, Alternator and Water Pump
• Fits 1985-1988 Mitsubishi Tredia, Alternator and Water Pump