Roadmax 5K478AP Serpentine Belt - Accessory Drive, Air Conditioning or Alternator

Roadmax 5K478AP Serpentine Belt Overview

The Roadmax 5K478AP is an automotive V-ribbed belt in the standard line, built with EPDM rubber and polyester cord reinforcement for everyday accessory drive service. It is a fitment-based replacement for select Chevrolet, Pontiac, Oldsmobile, Fiat, and Jeep applications, including Chevrolet Cavalier, Pontiac Grand Am, and Jeep Renegade models.

Roadmax positions this belt line for budget-conscious buyers who want dependable construction without stepping up to a premium-performance belt. The 5K478AP uses a 5-rib, K-section profile with a 17 mm top width and an effective length of 1214 mm (47.8 in).

Key Features

• Part number: 5K478AP
• Automotive V-ribbed belt, standard duty
• EPDM belt material for accessory drive service
• Polyester cord material for reinforcement
• 5-rib, K-section design
• Top width: 17 mm (.667 in)
• Effective length: 1214 mm (47.8 in)
• Outside circumference: 1228 mm (48.365 in)

Product Line Details

Roadmax Automotive V-Ribbed Belt (Standard) is the brand line for buyers seeking a practical replacement belt for routine maintenance. This line focuses on standard construction and fitment coverage rather than premium performance features, making it a straightforward option for common accessory drive belt replacement needs.

Detailed Description

The Roadmax 5K478AP serpentine belt is used in accessory drive belt systems to transfer engine rotation to driven components such as the alternator and other belt-driven accessories. Its EPDM construction and polyester cord support stable operation in normal underhood conditions, while the 5-rib profile helps maintain proper belt tracking on the pulley system. This part cross-references Gates K050478 for the same application.

Compatible fitment includes 2014-2018 Fiat 500L, 2015-2018 Jeep Renegade, 2016 Fiat 500X, and earlier applications such as 1999-2002 Chevrolet Cavalier and 2000-2001 Pontiac Grand Am. It also fits 2000-2002 Chevrolet Chevy, alternator, and 2000-2003 Chevrolet Astra, accessory drive, along with 1999-2001 Oldsmobile Alero and 1999-2002 Pontiac Sunfire.

What This Belt Helps 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 or tracking on the drive system
• Accessory drive issues related to belt slippage
• Routine maintenance replacement on high-mileage vehicles

Installation Notes and Tips

Verify belt routing against the vehicle’s accessory drive diagram before installation. Confirm the required length, rib count, and cross-section match the original belt specification, especially on vehicles with notes such as W/A.C. or 2nd design. For fitment reference, this part fits 2014-2018 Fiat 500L, 2015-2018 Jeep Renegade, and 1999-2002 Chevrolet Cavalier, N/A.

Inspect pulleys, tensioners, and idlers for wear before installing a new belt. A worn pulley surface or weak tensioner can shorten belt life and affect drive performance.

Quality Assurance

This belt is built with EPDM and polyester cord materials commonly used in modern accessory drive applications. Roadmax’s standard belt line is aimed at practical replacement use where quality construction and correct fitment are the primary requirements.