Mishimoto Expansion Tank

2023–2024 Toyota GR Corolla

MMRT-GRC-23MWBK

Overview:

The Mishimoto Coolant Expansion Tank is a premium upgrade designed specifically for the 2023 and 2024 Toyota GR Corolla. Engineered as a direct-fit replacement for the stock plastic tank, this all-aluminum expansion tank offers superior durability and enhanced cooling performance. It is ideal for enthusiasts and daily drivers alike who demand reliability and improved thermal management from their vehicle’s cooling system.

By increasing coolant capacity by 40%, the Mishimoto expansion tank helps reduce engine temperatures during spirited driving or track use, promoting consistent performance and longevity. Its robust construction eliminates common issues associated with factory plastic tanks, such as yellowing, cracking, and leaking after repeated heat cycles.

Key Features:

This expansion tank combines thoughtful engineering with high-quality materials to deliver both functional and aesthetic benefits:

• All-aluminum construction resists yellowing, cracking, and leaks over time
• 40% larger coolant capacity compared to the stock tank for improved heat dissipation
• Internal baffles prevent air from entering the cooling system during aggressive driving
• Easy-access bleed port simplifies air bleeding, reducing installation time and frustration
• High-visibility sight glass allows quick and accurate coolant level checks
• Stamped cold-fill line ensures precise coolant fill levels
• Available in micro-wrinkle red or black finishes to complement your vehicle’s style
• Backed by the Mishimoto Lifetime Warranty for long-term peace of mind

Construction & Design:

Crafted from high-grade aluminum, the Mishimoto expansion tank offers exceptional resistance to heat and pressure compared to the OEM plastic counterpart. The durable finish prevents discoloration and maintains a clean appearance even after extended exposure to engine bay conditions. Internal baffles are strategically placed to keep coolant near the overflow port, preventing air pockets from forming during hard cornering or rapid acceleration. This design ensures consistent coolant flow and system reliability under demanding driving conditions.

Installation & Fitment:

The Mishimoto expansion tank is a direct-fit replacement for the 2023–2024 Toyota GR Corolla, requiring no modifications for installation. It installs using existing mounting points and hoses, making the upgrade straightforward for enthusiasts with basic mechanical skills. The inclusion of an easy-access bleed port further streamlines the bleeding process, allowing for quick removal of trapped air and ensuring optimal cooling system performance.

What's Included:

• Mishimoto all-aluminum expansion tank (micro-wrinkle red or black finish)
• Direct-fit mounting hardware
• Easy-access bleed port
• High-visibility sight glass with stamped cold-fill line
• Installation instructions

Ideal For:

This expansion tank is perfect for Toyota GR Corolla owners seeking enhanced cooling system durability and performance. It is especially beneficial for drivers who engage in aggressive street driving, track days, or any application where improved heat dissipation and system reliability are critical. Additionally, those looking to upgrade the engine bay aesthetics will appreciate the available finish options that complement the GR Corolla’s sporty design.