Roadmax 5K778AP Serpentine Belt

Roadmax 5K778AP Serpentine Belt Overview

The Roadmax 5K778AP is an automotive V-ribbed belt in the standard product line, built for drivers who want dependable replacement quality without stepping up to a premium belt. Made with EPDM and polyester cord reinforcement, it is sized for accessory drive applications that require a 5-rib serpentine belt.

Compatible with select Saturn SC, SC2, SL2, and SW2 models, this belt is a direct-fit option for vehicles listed in the fitment data. If you are searching for a Saturn SC2 serpentine belt, Saturn SL2 accessory drive belt, or Roadmax 5K778AP replacement belt, this part number is the correct reference to verify against your application.

Key Features

• Roadmax Automotive V-Ribbed Belt (Standard) line
• Part number: 5K778AP
• EPDM construction for modern belt durability
• Polyester cord material for reinforcement
• 5-rib cross section, K designation
• Effective length: 1975 mm / 77.76 in
• Outside circumference: 1989 mm / 78.325 in
• Top width: 17 mm / .667 in

Product Details

The Roadmax Automotive V-Ribbed Belt (Standard) line is positioned as a practical replacement choice for budget-conscious maintenance. The 5K778AP uses EPDM belt material and polyester cord construction to serve as a standard serpentine belt for accessory drive systems. Its 5-rib profile and listed dimensions help ensure the belt matches the required routing and pulley engagement for the specified Saturn applications.

This part cross-references Gates K050778 for the same application. It also aligns with fitment for 1992 Saturn SC, 1993 Saturn SC2, 1992-1993 Saturn SL2, and 1993/1998-2001 Saturn SW2, along with 1998-2002 Saturn SC2 and SL2 models without air conditioning as listed.

Common Problems This Belt Can Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing serpentine belt
• Loss of proper belt tension due to age-related stretch
• Accessory drive noise from an aging belt surface
• Replacement needs during routine belt service on Saturn SC, SC2, SL2, or SW2 models

Installation Notes and Tips

Verify belt routing, rib count, and measured length before installation. This belt is listed for vehicles without air conditioning where noted in the fitment data, so confirm your exact engine accessory layout before ordering. Inspect pulleys, tensioner operation, and idlers for wear before installing the new belt, since worn components can shorten belt life and affect tracking.

Fits 1992 Saturn SC, N/A; Fits 1993 Saturn SC2, N/A; Fits 1992-1993 Saturn SL2, N/A; Fits 1993 Saturn SW2, N/A; Fits 1998-2001 Saturn SW2, N/A; Fits 1998-2002 Saturn SC2, N/A; Fits 1998-2002 Saturn SL2, N/A.

Quality Assurance

Roadmax positions this standard belt line as a value-focused replacement option for everyday service needs. The EPDM construction, polyester cord reinforcement, and application-specific sizing support consistent fitment for the listed Saturn vehicles.