Koyorad A13266 Radiator
OE Quality 60-Day Returns
Koyorad

Koyorad A13266 Radiator

Brand Koyorad A13266
Core Height 25.0625
Core Material Aluminum
Core Row Quantity 1
Core Thickness 1
Core Width 18.75
Inlet Diameter 1.375
Internal Transmission Oil Cooler Yes
Outlet Diameter 1.375
Tank Material Plastic
Title Koyorad a13266 radiator
Transmission Oil Cooler Diameter 1.0625
Transmission Oil Cooler Plate Quantity 5
Fits INFINITI · 3 vehicles

OE equivalent radiator. Built to replace the original with a direct-fit design.

Aluminum core. Helps transfer heat efficiently for dependable cooling performance.

Integrated oil cooler. Adds transmission fluid cooling in one radiator assembly.

$188.55Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $188.55
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OE-Style Cooling Replacement for INFINITI M56

The Koyorad A13266 radiator is an OE-equivalent replacement built for 2011-2013 INFINITI M56 applications. It combines an aluminum core with plastic tanks and an integrated internal transmission oil cooler to support factory-style cooling performance.

Key Features

  • Fits 2011-2013 INFINITI M56
  • OE-equivalent radiator replacement from Koyorad
  • Aluminum core with a 1-row design
  • Plastic tank construction
  • Internal transmission oil cooler included
  • Core dimensions: 25.0625 in. height, 18.75 in. width, 1 in. thickness
  • Inlet and outlet diameters: 1.375 in.
  • Transmission oil cooler diameter: 1.0625 in. with 5 plate quantity

Detailed Description

Koyorad A13266 is a direct-fit radiator for the 2011, 2012, and 2013 INFINITI M56. Built with an aluminum core and plastic tanks, it follows OE-style construction for a straightforward replacement in vehicles that use an integrated transmission oil cooler. The A13266 radiator is sized to match the original cooling layout and supports proper coolant flow through its single-row core design.

Koyorad focuses on replacement radiators engineered to meet original-equipment expectations for fit and function. For INFINITI M56 owners searching for a radiator replacement, Koyorad A13266 provides a practical option for restoring cooling system performance without changing the factory configuration.

What This Radiator Helps Address

  • Coolant leaks from a damaged or aging radiator
  • Overheating caused by restricted or inefficient heat transfer
  • Transmission cooling concerns related to a failing internal cooler
  • Cracked plastic tanks or worn radiator seams
  • Reduced cooling efficiency in high-mileage INFINITI M56 vehicles

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet size, and transmission cooler connections before installation. Drain the cooling system fully, inspect hoses and clamps for wear, and confirm the transmission cooler lines are clean before reconnecting. After installation, refill with the correct coolant mixture and bleed the system according to factory service procedures.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific engineering and replacement-focused construction. Part number A13266 is built for the listed INFINITI M56 fitment and follows the original cooling system layout for direct replacement use.

Related reading

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2013INFINITIM565.6LV8—
2012INFINITIM565.6LV8—
2011INFINITIM565.6LV8—