Dayco 5040388 Serpentine Belt

Dayco 5040388 Serpentine Belt Overview

The Dayco 5040388 serpentine belt is a K-section accessory drive belt built for specific power steering, air conditioning, alternator, water pump, fan, and tensioner applications. It uses EPDM construction with aramid reinforcement for dependable belt tracking and consistent operation across a wide temperature range.

Compatible With select Mitsubishi, Chrysler, Dodge, Nissan, Mazda, Cadillac, and Subaru applications, this belt is sized for vehicles that require a 4-rib, straight-rib design. If you are replacing a worn belt on a Mitsubishi Outlander, Mitsubishi Galant, or Chrysler Sebring, the Dayco 5040388 is a direct-fit option for the listed positions.

Key Features

• EPDM rubber construction with aramid reinforcement
• 4-rib K-section profile for accessory drive systems
• Black belt with straight rib profile and deep rib depth
• Effective length: 38.80 in. / 985.52 mm
• Outside circumference: 39.46 in. / 1002.29 mm
• Top width: 0.54 in.
• Operating temperature range: -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5040388 is an accessory drive serpentine belt engineered for vehicles that rely on a compact 4-rib layout. The EPDM compound is selected for heat resistance and long service life, while aramid reinforcement adds strength for stable performance under accessory load. This makes it a practical replacement for systems that drive components such as the alternator, water pump, power steering pump, air conditioning compressor, fan, and tensioner.

Fitment includes 2007-2008 Mitsubishi Outlander, power steering; 2004-2007 Cadillac CTS, air conditioning and tensioner; 2004-2006 Chrysler Sebring, power steering; 2004-2006 Dodge Stratus, power steering; 1997-1999 Mitsubishi Montero Sport, fan and alternator; 1995-1997 Mitsubishi Eclipse, alternator and water pump; 1993-1996 Mitsubishi Galant, alternator and water pump; 1993-1995 Mitsubishi Expo, alternator and water pump; 1993-1994 Dodge Colt, alternator and water pump; 1993-1994 Mitsubishi Expo LRV, alternator and water pump; 1992-1994 Nissan Maxima, water pump to power steering; and 1986 Mazda 323, air conditioning and power steering. This part cross-references Gates (e.g., K040388, K040388HD) for the same application.

What It Helps Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or fraying on the existing belt
• Loss of accessory drive performance at the alternator, water pump, or power steering system
• Improper belt tracking caused by belt wear or stretch
• Service replacement for listed Mitsubishi, Chrysler, Dodge, Nissan, Mazda, and Cadillac applications

Installation Notes and Tips

Verify rib count, effective length, and outside circumference before installation. Confirm the vehicle’s accessory routing and listed position, since fitment varies by application and system layout. Inspect pulleys, tensioners, and idlers for wear before installing the new belt, and replace any damaged components that could affect belt alignment.

Quality Assurance

This Dayco belt is manufactured to SAE J1459 and SAE J2432 standards and uses EPDM with aramid reinforcement for durability in demanding accessory drive systems. The part number 5040388 should be matched to the exact vehicle, year, and position listed above for proper fitment.