Dayco 5040440 Serpentine Belt

Dayco 5040440 Serpentine Belt Overview

The Dayco 5040440 serpentine belt is built for accessory drive applications that demand stable grip, consistent tracking, and dependable operation across a wide temperature range. Made from EPDM with aramid reinforcement, it is engineered for air conditioning, main drive, alternator, and air conditioning and power steering applications on select Audi, Ram, Honda, Toyota, Buick, Oldsmobile, and Pontiac vehicles.

For shoppers searching for a Dayco 5040440 serpentine belt for Audi A6 Quattro air conditioning or a replacement belt for Ram ProMaster 2500 main drive service, this part number provides a direct OE-style solution. It also cross-references Gates K040440 for the same application.

Key Features

• EPDM construction for durable belt performance
• Aramid reinforced for added strength and stability
• 4-rib K-section profile with straight rib design
• Black finish with standard rib depth
• Effective length: 44.09 in. / 1119.89 mm
• Outside circumference: 44.75 in. / 1136.65 mm
• Operating temperature range: -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5040440 is a 4-rib serpentine belt designed for accessory drive system service where consistent belt tracking and resistance to heat and wear matter. The EPDM rubber compound helps maintain performance in demanding underhood conditions, while aramid reinforcement adds tensile strength for steady operation. With a K-section cross section and straight rib profile, this belt is suited to vehicles that require a precise fit and reliable pulley engagement.

Fitment includes 2019-2025 Audi A6 Quattro, Air Conditioning; 2020-2026 Audi Q7, Air Conditioning; 2017-2018 Ram ProMaster 2500, Main Drive; and 1995-1997 Honda Accord, Alternator. Additional coverage includes Audi A8 Quattro, Q8, A7 Sportback, S4, S5, SQ5, and SQ5 Sportback, plus select Toyota, Buick, Oldsmobile, and Pontiac applications. Search terms such as Dayco 5040440 serpentine belt for Audi Q7 air conditioning or 2017 Ram ProMaster 3500 main drive belt replacement align with this part’s confirmed vehicle coverage.

What This Belt Helps Address

• Squealing or slipping accessory drive belt noise
• Cracked, glazed, or worn belt surfaces
• Loss of alternator, A/C, or power steering drive performance
• Improper belt tracking on worn or aging accessory drive systems
• Service replacement for OE-style belt maintenance

Installation Notes and Tips

Verify belt routing, rib count, and effective length before installation. Confirm the vehicle’s accessory drive configuration and position, especially on Audi air conditioning applications and Ram ProMaster main drive setups. Inspect pulleys, tensioners, and idlers for wear before installing the new belt, since damaged components can shorten belt life or affect tracking. Compare the removed belt to Dayco 5040440 to confirm the correct profile and length.

Quality Assurance

This belt is manufactured to SAE J1459 and SAE J2432 standards for accessory drive belt performance. Dayco’s EPDM and aramid-reinforced construction supports consistent service in a wide operating temperature range, from -45°F to 212°F.