Roadmax 6K455AP Serpentine Belt

Roadmax 6K455AP Serpentine Belt Overview

The Roadmax 6K455AP is an automotive V-ribbed belt built for drivers who want dependable OE-style performance without stepping up to a premium belt. Made with EPDM and a polyester cord, it is sized for accessory drive systems that rely on stable belt tracking and consistent power transfer.

This serpentine belt is a practical replacement for many BMW and Toyota applications, including the BMW 330i, BMW X3, Toyota GR Supra, and Toyota Supra. The 6K455AP is also listed across a wide range of interchange part numbers for direct replacement research.

Key Features

• EPDM construction for modern accessory drive durability
• Polyester cord material for belt stability
• 6-rib design for OE-style belt routing
• OE Performance grade for standard replacement needs
• Top width: 20 mm (.807 in.)
• Effective length: 1155 mm (45.49 in.)
• Outside circumference: 1170 mm (46.07 in.)
• Cross section designation: K

Product Details

Roadmax positions the Automotive V-Ribbed Belt (Standard) line as a value-focused option for customers who want quality replacement parts without the added performance level of a premium belt. The 6K455AP follows that approach with OE-style dimensions and a 6-rib profile suited to accessory drive belt system service. If you are replacing a worn serpentine belt on a BMW 330i, BMW X4, or Toyota GR Supra, this part number is built to match the listed application requirements.

This part cross-references Gates K060455 and Dayco 5060455 for the same application.

Common Problems This Belt Can Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing belt
• Loss of belt tension from age-related stretch
• Accessory drive noise during alternator or A/C operation
• Service replacement for a belt at the end of its maintenance life

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. Inspect pulleys, tensioners, and idlers for wear before installing the new belt, since damaged components can shorten belt life and affect tracking.

Compatible With select BMW and Toyota applications, including Fits 2019-2024 BMW 330i, N/A; Fits 2018-2021 BMW X3, N/A; Fits 2020-2025 Toyota GR Supra, N/A; and Fits 2021-2025 Toyota Supra, N/A. Additional listed coverage includes BMW 230i, 430i, 530i, 740i, X4, X5, X6, Z4, and related models with the specified accessory drive configurations.

Quality Assurance

The Roadmax 6K455AP is an OE Performance grade serpentine belt made with EPDM and polyester cord materials for standard replacement use. Its published dimensions and interchange references support parts lookup and fitment verification for accessory drive belt service.