Mishimoto MMRT-GRC-23MWRD Red Expansion Tank for 2023-2025 Toyota GR Corolla

Vehicle Fitment

• 2023-2025 Toyota GR Corolla (All Trims - Core, Circuit Edition, Morizo Edition; 1.6L G16E-GTS Turbo; AWD)

Fitment Notes

• Direct-fit replacement for the factory plastic coolant expansion tank - no cutting or modification required
• Fits all GR Corolla trim levels: Core, Circuit Edition, and Morizo Edition
• Finish: Micro-Wrinkle Red - also available in Micro-Wrinkle Black (MMRT-GRC-23MWBK)

Features

• All-aluminum construction resists yellowing, cracking, and leaking caused by repeated heat cycles - a known failure mode of the OEM plastic tank
• Internal baffles keep coolant near the overflow port during aggressive driving to prevent air entry into the cooling system
• 40% increase in coolant capacity over the stock tank for improved heat dissipation and thermal buffer
• Easy-access bleed port simplifies air bleeding from the cooling system, reducing service time and frustration
• High-visibility sight glass allows for quick coolant level checks at a glance
• Stamped cold-fill line indicates the correct coolant level when the engine is cold
• Micro-wrinkle red powder coat finish adds a distinctive engine bay appearance
• Backed by the Mishimoto Lifetime Warranty

Specifications

• Part Number: MMRT-GRC-23MWRD
• Finish: Micro-Wrinkle Red
• Construction: All-Aluminum
• Coolant Capacity Increase: 40% over stock
• Dimensions (L x W x H): 10.9" x 9.9" x 8.2"
• Weight: 9.039 lbs
• Internal Baffles: Yes
• Bleed Port: Yes (easy-access)
• Sight Glass: Yes (high-visibility)
• Cold-Fill Line: Yes (stamped)
• Installation Difficulty: Easy

Included Components

• 1x Mishimoto Aluminum Coolant Expansion Tank (Micro-Wrinkle Red)
• 1x Overflow Hose
• 1x Mishimoto Expansion Tank Cap
• 2x Worm Gear Clamps

Product Description

The Mishimoto MMRT-GRC-23MWRD is a direct-fit aluminum coolant expansion tank engineered for the 2023-2025 Toyota GR Corolla across all trim levels - Core, Circuit Edition, and Morizo Edition. The OEM plastic expansion tank is prone to yellowing, cracking, and leaking as heat cycles accumulate, particularly on a performance platform like the G16E-GTS that sees sustained high-rpm and boosted use. Mishimoto's aluminum replacement eliminates these failure points entirely while delivering a 40% increase in coolant capacity over stock for improved thermal buffer and heat dissipation. Internal baffles keep coolant near the overflow port during aggressive cornering and hard acceleration, preventing air from entering the cooling system during track or spirited driving.

Practical features include an easy-access bleed port to speed up cooling system air bleeding, a high-visibility sight glass for at-a-glance coolant level checks, and a stamped cold-fill line for accurate filling. The micro-wrinkle red powder coat finish complements performance-oriented engine bays and is a natural pairing with other red-finish Mishimoto GR Corolla cooling components. Installation is straightforward and requires no cutting or modification. Backed by the Mishimoto Lifetime Warranty. Also available in Micro-Wrinkle Black (MMRT-GRC-23MWBK).