Roadmax 4K551AP Serpentine Belt - Air Conditioning, Air Conditioning and Power Steering or Alternator and Air Conditioning

Roadmax V-Ribbed Belt for Ford Transit

The Roadmax 4K551AP is a standard automotive V-ribbed serpentine belt built with EPDM and polyester cord for everyday accessory drive service. It is sized for applications that use a 4-rib, K-section belt and is a practical choice for budget-conscious repairs on Ford Transit vans and related models.

Key Features

• EPDM construction for durable accessory drive performance
• Polyester cord reinforcement for stable belt tension and tracking
• 4-rib, K-section design for compatible serpentine drive systems
• Effective length: 1400 mm (55.13 in.)
• Outside circumference: 1415 mm (55.75 in.)
• Top width: 14 mm (0.56 in.)
• Roadmax part number 4K551AP

Product Details

Roadmax Automotive V-Ribbed Belt (Standard) line is positioned for drivers who want a dependable replacement belt without stepping up to a premium-performance option. The 4K551AP uses EPDM rubber and polyester reinforcement to deliver the dimensions and construction needed for accessory drive applications that power components such as the alternator and air conditioning compressor. This belt cross-references Gates K040551 and Bando 4PK1400 for the same application. It is a direct-fit option for select Ford Transit, Ford Transit-150, Ford Transit-250, Ford Transit-350, and Ford Transit-350 HD configurations, along with listed Chrysler PT Cruiser and Dodge Neon applications.

Common Problems This Belt Can Address

• Squealing or chirping from a worn serpentine belt
• Cracking, glazing, or rib wear on the existing belt
• Loss of accessory drive performance from belt slip
• Charging or air-conditioning issues related to belt condition
• Replacement needs during routine accessory drive service

Installation Notes and Fitment

• Fits 2025 Ford Transit, Alternator and Air Conditioning, W/Dual Alts.; Available Until Stock Depleted
• Fits 2025 Ford Transit-150, Alternator and Air Conditioning, W/Dual Alts.; Available Until Stock Depleted
• Fits 2025 Ford Transit-250, Alternator and Air Conditioning, W/Dual Alts.; Available Until Stock Depleted
• Fits 2025 Ford Transit-350, Alternator and Air Conditioning, W/Dual Alts.; Available Until Stock Depleted
• Fits 2025 Ford Transit-350 HD, Alternator and Air Conditioning, W/Dual Alts.; Available Until Stock Depleted
• Fits 2023-2024 Ford Transit, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2020 Ford Transit, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2023-2024 Ford Transit-150, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2020 Ford Transit-150, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2023-2024 Ford Transit-250, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2020 Ford Transit-250, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2023-2024 Ford Transit-350, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2020 Ford Transit-350, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2023-2024 Ford Transit-350 HD, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2020 Ford Transit-350 HD, Alternator and Air Conditioning, W/Dual Alts.
• Fits 2021-2022 Ford Transit, Air Conditioning, W/Dual Alts.
• Fits 2021-2022 Ford Transit-150, Air Conditioning, W/Dual Alts.
• Fits 2021-2022 Ford Transit-250, Air Conditioning, W/Dual Alts.
• Fits 2021-2022 Ford Transit-350, Air Conditioning, W/Dual Alts.
• Fits 2021-2022 Ford Transit-350 HD, Air Conditioning, W/Dual Alts.
• Fits 2003-2010 Chrysler PT Cruiser, Air Conditioning and Power Steering
• Fits 2005 Dodge Neon, N/A
• Fits 2003-2004 Dodge Neon, Air Conditioning and Power Steering

Before installation, confirm belt routing, rib count, and the measured length against the original belt or service information. On Ford Transit applications, verify whether the vehicle uses dual alternators and whether the belt is for alternator and air conditioning service or air conditioning only. Proper pulley alignment and tensioner condition should be checked during replacement to help prevent premature wear.

Quality Assurance

Roadmax offers this standard V-ribbed belt as a value-focused replacement built to meet everyday accessory drive requirements. The EPDM belt construction and polyester cord reinforcement support consistent fitment across the listed Ford Transit, Chrysler PT Cruiser, and Dodge Neon applications.