Roadmax 6K400AP Serpentine Belt

Roadmax 6K400AP Serpentine Belt Overview

The Roadmax 6K400AP is a standard automotive V-ribbed serpentine belt built with EPDM rubber and polyester cord reinforcement. It is sized for accessory drive applications where dependable everyday operation matters, including Hyundai Elantra N, Hyundai Kona N, and Hyundai Veloster N fitments.

Roadmax positions this belt line for budget-conscious buyers who want solid quality without stepping up to a premium-performance belt. The 6-rib, K-section design helps maintain consistent drive engagement across the accessory system.

Key Features

• EPDM construction for modern accessory drive belt service
• Polyester cord reinforcement for stable belt structure
• 6-rib V-ribbed design for accessory drive applications
• Top width: 20 mm (.807 in.)
• Effective length: 1019 mm (40.13 in.)
• Outside circumference: 1034 mm (40.695 in.)
• Standard automotive V-ribbed belt profile

Product Details

The Roadmax Automotive V-Ribbed Belt (Standard), part number 6K400AP, is engineered to match common OE-style accessory drive dimensions for a range of vehicles. It cross-references select applications from Gates K060400 and K060400HD, Bosch 6709, and Dayco 5060400, making it easier to identify the correct replacement for the same belt size and configuration. This part number 6K400AP is also listed for Hyundai Elantra N and Hyundai Kona N applications, along with Hyundai Veloster N coverage.

Use this belt when servicing the accessory drive system on vehicles that require a 6-rib, 40.13-inch effective length serpentine belt. The Roadmax 6K400AP is a practical replacement choice for drivers looking for a standard belt construction rather than a premium-duty upgrade.

What This Belt Helps Address

• Squealing or slipping from a worn serpentine belt
• Cracking, glazing, or rib wear on the accessory drive belt
• Loss of consistent drive to alternator and other belt-driven accessories
• Incorrect belt length after prior replacement or service
• Routine maintenance on Hyundai Elantra N, Hyundai Kona N, and Hyundai Veloster N belt systems

Installation Notes and Tips

Verify belt routing, rib count, and measured length before installation. Confirm the vehicle application by year, make, model, and accessory position, since this belt is listed for multiple positions including alternator, air conditioning, and fan/air conditioning on select Ford and Mercury applications. For fitment examples, this part fits 2022-2025 Hyundai Elantra N, N/A; fits 2022-2023 Hyundai Kona N, N/A; and fits 2022 Hyundai Veloster N, Alternator.

Inspect pulleys, tensioners, and idlers before installing a new belt so the replacement can run on clean, aligned surfaces. This part cross-references Gates K060400 and Bosch 6709 for the same application.

Quality Assurance

Roadmax markets this belt line as a standard replacement option for buyers who want dependable quality in a value-focused accessory drive belt. EPDM belt material and polyester cord reinforcement support consistent service in everyday automotive use.