Koyorad A13631 Radiator

Koyorad A13631 Radiator for Infiniti

The Koyorad A13631 radiator is an OE-equivalent replacement built for select Infiniti performance applications. It combines an aluminum core with plastic tanks and an internal transmission oil cooler to support factory-style cooling performance in the 2016-2020 Infiniti Q50 and Q60 lineup.

Koyorad Radiator products are engineered with the technical experience needed to deliver a direct-fit replacement that matches the original cooling system layout. For drivers searching for a radiator for 2019 Infiniti Q50 Red Sport or a 2019-2020 Infiniti Q60 Red Sport radiator, this part number provides a focused fitment solution.

Key Features

• Part number: A13631
• OE-equivalent radiator replacement from Koyorad
• Aluminum core construction with plastic tanks
• Single-row core design
• Core dimensions: 14.9375 in. height x 28.5 in. width x 1.5625 in. thickness
• Inlet and outlet diameters: 1.375 in.
• Internal transmission oil cooler included
• Transmission oil cooler diameter: 1.0625 in.
• Transmission oil cooler plate quantity: 4

Product Details

The Koyorad A13631 radiator is built for direct replacement in compatible Infiniti applications, including 2016-2018 Infiniti Q50, 2017-2018 Infiniti Q60, 2019 Infiniti Q50 Red Sport, and 2019-2020 Infiniti Q60 Red Sport. Its aluminum core helps transfer heat efficiently, while the integrated transmission oil cooler supports the factory cooling system layout. If you need a Koyorad A13631 radiator for Infiniti Q50 or Infiniti Q60 service work, this unit is specified to match the listed vehicle applications.

This part cross-references no listed alternate part numbers for the same application.

Common Reasons for Replacement

• Leaking radiator tanks or core seams
• Restricted coolant flow from internal buildup
• Overheating caused by reduced heat exchange efficiency
• Transmission cooler service needs tied to the radiator assembly
• Damage from age, road debris, or corrosion

Installation Notes

Verify radiator dimensions, inlet and outlet size, and transmission cooler connections before installation. Drain the cooling system, inspect hoses and clamps, and confirm the replacement matches the vehicle’s trim and model year. After installation, refill with the correct coolant, bleed air from the system, and check for leaks at all hose and cooler connections.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific engineering and cooling-system experience. The A13631 is built to meet the listed fitment requirements for the Infiniti Q50 and Q60 applications shown above.