Hayden 403 Automatic Transmission Oil Cooler

Hayden 403 Trans Oil Cooler Overview

The Hayden 403 Trans Oil Cooler is a tube-and-fin automatic transmission oil cooler built for vehicles that need added fluid temperature control. With an aluminum core, silver finish, and 7 1/2" x 12 1/2" footprint, it is sized for a wide range of light-duty and medium-duty applications.

Hayden’s Trans Oil Cooler line focuses on practical cooling performance for automatic transmissions, and the 403 follows that approach with a compact Ultra-Cool design, 6-row core construction, and 3/8" hose barb connections.

• Part number: Hayden 403
• Tube & fin automatic transmission oil cooler
• Aluminum construction with silver finish
• Core size: 7 1/2" x 12 1/2"
• 6-row core design for fluid cooling
• 3/8" male hose barb inlet and outlet
• Mounting hardware included
• Performance rated
• Burst pressure rating: 150 psi

Detailed Product Description

Built as an automatic transmission oil cooler, the Hayden 403 is designed to route hot transmission fluid through a compact aluminum tube-and-fin core to help reduce operating temperature. The 12.500-inch length, 7.500-inch height, and 0.750-inch thickness make it a practical choice where core space is limited, while the 0.500-inch core tube width supports efficient fluid passage. This part number 403 is a direct fitment match for many vehicles across Chevrolet, Honda, Toyota, Nissan, Subaru, Mazda, Volvo, Ford, and more, including applications such as 2011-2021 Honda Civic, 2011-2021 Toyota RAV4, and 2010-2022 Chevrolet Silverado 1500.

This part cross-references Four Seasons (e.g., 14822, 53001) for the same application.

What It Helps Address

• High transmission fluid temperatures during towing or stop-and-go driving
• Heat buildup in automatic transmissions under load
• Reduced cooling capacity from an aging or undersized cooler
• Transmission stress in vehicles used for daily driving, hauling, or commuting
• Fitment needs for compact cooler space in front-end installations

Installation Notes and Tips

Verify minimum core space before installation, especially on applications noted for compact packaging. The cooler uses 3/8" hose barb male connections with 0.375-inch inlet and outlet diameters, so confirm hose I.D. and routing before assembly. Mounting hardware is included, and the unit is supplied without a bracket. Check clearance around the radiator support, condenser, and fan shroud before final mounting.

Compatible With many 2010-2022 applications, including Chevrolet Blazer, Honda Accord, Toyota Tacoma, Nissan Rogue, Subaru Forester, and related models listed in the fitment data. Fits 2011-2021 Honda Civic, 2011-2021 Toyota RAV4, and 2010-2022 Chevrolet Silverado 1500 in listed applications.

Quality Assurance

Hayden is a recognized cooling-system brand, and the 403 Trans Oil Cooler is performance rated with a 150 psi burst rating for demanding transmission cooling service. The aluminum tube-and-fin construction supports consistent heat transfer in a compact package.