Mishimoto Expansion Tank

2023–2024 Toyota GR Corolla

MMRT-GRC-23MWRD

Overview:

The Mishimoto Coolant Expansion Tank is a premium upgrade designed specifically for the 2023 and newer Toyota GR Corolla models. Engineered as a direct-fit replacement for the factory plastic tank, this all-aluminum expansion tank addresses common issues such as yellowing, cracking, and leaking caused by repeated heat cycles. It offers enhanced durability and reliability for enthusiasts who demand consistent cooling performance during spirited driving or track use.

With a 40% increase in coolant capacity over the stock tank, this Mishimoto expansion tank improves heat dissipation, helping maintain optimal engine temperatures under aggressive conditions. Its internal baffles prevent air from entering the cooling system during hard cornering or acceleration, ensuring stable coolant flow and reducing the risk of overheating. This tank is an ideal upgrade for GR Corolla owners seeking both improved cooling efficiency and a refined under-hood appearance.

Key Features:

Designed with performance and reliability in mind, the Mishimoto Expansion Tank offers several advanced features that enhance the cooling system of your Toyota GR Corolla:

• All-aluminum construction resists yellowing, cracking, and leaking over time, unlike stock plastic tanks
• 40% larger coolant capacity increases heat dissipation and cooling system efficiency
• Internal baffles keep coolant near the overflow port during aggressive driving to prevent air entry
• Easy-access bleed port simplifies the air bleeding process, saving time during installation and maintenance
• High-visibility sight glass with stamped cold-fill line allows quick and accurate coolant level checks
• Available in micro-wrinkle red or black finishes to complement your engine bay aesthetics
• Direct-fit design ensures seamless installation with no modifications required
• Backed by the Mishimoto Lifetime Warranty for long-term peace of mind

Construction & Design:

The Mishimoto Expansion Tank is crafted from high-quality aluminum, providing superior strength and heat resistance compared to the OEM plastic tank. This material choice prevents common issues such as discoloration, brittleness, and cracking that occur with plastic over time and exposure to engine heat cycles. The tank’s robust construction ensures it maintains structural integrity and leak-free performance even under demanding driving conditions.

Internally, the tank features precision-engineered baffles that stabilize coolant flow and prevent air pockets from forming during aggressive cornering or acceleration. This design helps maintain consistent coolant levels near the overflow port, reducing the risk of air entering the cooling system and causing overheating or erratic temperature readings. The external finish options—micro-wrinkle red or black—offer a durable, corrosion-resistant coating that enhances the engine bay’s visual appeal.

Installation & Fitment:

This expansion tank is a direct replacement for the stock coolant tank on 2023 and 2024 Toyota GR Corolla models, requiring no modifications or special tools for installation. The included bleed port allows for straightforward air removal from the cooling system, simplifying the bleeding process and reducing installation time. Whether you are upgrading for improved performance or reliability, this tank fits perfectly and integrates seamlessly with the factory cooling components.

What's Included:

• Mishimoto all-aluminum coolant expansion tank (micro-wrinkle red finish)
• Bleed port for easy air removal
• Installation hardware
• Lifetime warranty documentation

Ideal For:

The Mishimoto Expansion Tank is perfect for Toyota GR Corolla owners who want to enhance their vehicle’s cooling system durability and efficiency. It is especially suited for enthusiasts who engage in aggressive driving, track days, or performance tuning, where maintaining stable engine temperatures is critical. Additionally, those looking to upgrade the engine bay aesthetics with a high-quality, visually striking component will appreciate the available finish options.