Roadmax 4K305AP Serpentine Belt

Roadmax 4K305AP Serpentine Belt Overview

The Roadmax 4K305AP is a standard automotive V-ribbed belt built with EPDM and polyester cord for dependable accessory drive service. It is sized for 4-rib applications and is a practical choice for drivers replacing a worn serpentine belt on vehicles such as the Nissan Maxima, Honda Civic, and Mitsubishi Lancer.

Roadmax positions this belt line for budget-conscious buyers who want solid quality without stepping up to a premium-performance belt. The 4K305AP follows common OE-style dimensions and cross-references with several aftermarket and OE part numbers for straightforward replacement matching.

Key Features

• Standard automotive V-ribbed belt for accessory drive systems
• EPDM construction for durable everyday service
• Polyester cord material for belt stability
• 4-rib design for supported applications
• Top width: 14 mm (.56 in.)
• Effective length: 779 mm (30.65 in.)
• Outside circumference: 793 mm (31.213 in.)
• Cross section designation: K

Product Details

Roadmax 4K305AP is a serpentine belt used in accessory drive system applications where the belt powers components such as the alternator, power steering, or air conditioning, depending on vehicle configuration. This part number is listed for fitments including 1989-1994 Nissan Maxima alternator, 2002-2006 Nissan Altima power steering, 2004-2011 Mazda RX-8 air conditioning, 1999-2000 Honda Civic alternator, and 2002-2007 Mitsubishi Lancer alternator. It also fits other confirmed applications across Nissan, INFINITI, Honda, Mitsubishi, Chevrolet, Pontiac, Acura, and more.

This part cross-references Gates K040305 and Dayco 5040305 for the same application.

What It Helps Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing belt
• Loss of belt grip on alternator, power steering, or A/C drive systems
• Incorrect belt length after a previous replacement
• Routine maintenance replacement on high-mileage vehicles

Installation Notes and Tips

Verify belt routing, rib count, and measured length before installation. Confirm the application by position and engine accessory layout, since this belt is listed for alternator, power steering, and air conditioning positions across different vehicles. Inspect pulleys, tensioners, and idlers for wear before installing the new belt, and replace any damaged components that could shorten belt life.

Quality Assurance

Roadmax markets the Automotive V-Ribbed Belt (Standard) line as a value-focused option for customers who want quality construction at a lower price point than premium belt offerings. The EPDM belt material and polyester cord construction support consistent service in everyday accessory drive use.