IRIEQU Transmission Oil Cooler for Subaru (Replaces 31237AA100) — Direct-Fit, OE-Style Cooling

This transmission oil cooler from IRIEQU is designed to match factory fit and function for a range of Subaru vehicles, including Outback, Legacy, Forester, XV/Crosstrek, WRX/Levorg and Impreza model years listed. Built using precision manufacturing and subjected to multiple quality checks, it provides the mounting points, fluid ports and cooling surface area needed to integrate with the vehicle’s transmission plumbing without modification.

Which Subaru models will this oil cooler fit?

The IRIEQU cooler is manufactured to replace the OEM part number 31237AA100 and fits specific Subaru platforms across several years. Check compatibility carefully against your car’s year and model before ordering to ensure bolt pattern and port locations match.

• Outback / Legacy B15: 2014–2020
• Forester: 2013–2018
• XV / Crosstrek S13: 2012–2019
• WRX / Levorg V10: 2014 and up
• Impreza G13 / G23: 2011–2016

How does this cooler compare to the original equipment part?

IRIEQU designs the cooler to meet OE dimensions and interface points so it installs like the original component. Materials and production use advanced equipment and each unit is inspected repeatedly to help ensure consistent quality prior to shipment.

• Direct replacement for part number 31237AA100
• Factory-style mounting and fluid port locations
• Manufactured under strict OE-like standards and testing

What are the installation and maintenance considerations?

Installation typically follows the original cooler removal and hose reconnection process; no custom modifications are expected when the part matches your vehicle. Always drain transmission fluid safely, inspect lines and seals, and refill with the manufacturer-recommended fluid and volume after installation.

• Requires standard hand tools and safe fluid handling
• Inspect hoses, clamps and O-rings during replacement
• Refill and bleed transmission fluid per Subaru specifications

What warranty and support does IRIEQU provide?

IRIEQU inspects items before shipment and offers customer support for issues arising after purchase. If you encounter product quality problems within six months of buying, contact IRIEQU for assistance and resolution options.

• Pre-shipment testing and quality checks
• Six-month support for product quality concerns
• Customer service contact for troubleshooting and returns

Who is this for: This oil cooler is intended for Subaru owners, independent mechanics and restoration shops that need a reliable, OE-form replacement for the transmission oil cooler identified by part number 31237AA100. If your vehicle and model year appear in the compatibility list and you want a direct-fit cooler manufactured to OE-like standards, this IRIEQU unit is a practical replacement choice.