Koyorad A2691 Radiator

Koyorad A2691 Radiator for Nissan and INFINITI

The Koyorad A2691 radiator is an OE-equivalent replacement built for cooling-system service on select Nissan Armada, Nissan TITAN, and INFINITI QX56 applications. It features an aluminum core with plastic tanks and includes an internal transmission oil cooler for integrated heat management.

Key Features

• OE-style replacement radiator from Koyorad
• Aluminum core with plastic tank construction
• Single-row core design
• Core dimensions: 23.5 in. height, 27.75 in. width, 1.3125 in. thickness
• Inlet and outlet diameters: 1.375 in.
• Internal transmission oil cooler included
• Transmission oil cooler diameter: 1.25 in.
• Part number: A2691

Detailed Description

Koyorad A2691 is a direct-fit radiator replacement engineered to match OE-style cooling system requirements for 2004-2015 Nissan TITAN, 2005-2015 Nissan Armada, and 2004-2010 INFINITI QX56 applications. The aluminum core supports efficient heat transfer, while the plastic tank design follows common factory radiator construction for these vehicles. The integrated transmission oil cooler adds a built-in fluid cooling path for automatic-transmission-equipped vehicles that use this configuration. Koyorad applies its manufacturing experience to produce replacement radiators that align with original equipment expectations for fit and function.

Vehicle Fitment

• Fits 2005-2015 Nissan Armada, N/A
• Fits 2004-2015 Nissan TITAN, N/A
• Fits 2004-2010 INFINITI QX56, N/A

Common Cooling System Issues Addressed

• Cracked or leaking radiator tanks
• Corroded or damaged radiator core
• Restricted coolant flow from an aging radiator
• Transmission fluid temperature control concerns tied to a failed internal cooler
• Overheating caused by reduced radiator efficiency

Installation Notes and Tips

Verify inlet and outlet hose diameters, core dimensions, and transmission cooler connections before installation. Flush the cooling system, inspect hoses and clamps, and confirm the replacement radiator matches the vehicle’s factory transmission cooler setup. For best results, refill with the correct coolant mixture and bleed air from the system according to service procedures.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific engineering and production standards intended to match factory replacement needs. Part number A2691 is built for the listed Nissan and INFINITI applications and follows the brand’s focus on accurate replacement fitment and cooling performance.