Mishimoto Aluminum Coolant Expansion Tank – Ford Bronco (Polished)

2021–2026 Ford Bronco 2.3L / 2.7L EcoBoost | Polished Finish | Part Number: MMRT-BR-21P

Upgrade your Bronco’s reliability and engine bay appearance with the Mishimoto Aluminum Coolant Expansion Tank (MMRT-BR-21P). Designed specifically for the 2021–2026 Ford Bronco 2.3L and 2.7L EcoBoost, this direct-fit replacement eliminates the weak factory plastic tank.

The OEM expansion tank is prone to cracking and failure over time due to repeated heat cycles. This Mishimoto upgrade features fully TIG-welded aluminum construction, ensuring long-term durability even under extreme off-road and high-heat conditions. 

Finished in a high-polish aluminum, this tank not only improves reliability but also adds a premium, show-quality look under the hood.

Key Features

• Direct fit for 2021–2026 Ford Bronco 2.3L & 2.7L
• Part Number: MMRT-BR-21P
• Polished aluminum construction
• Replaces failure-prone factory plastic tank
• Fully TIG-welded for maximum strength
• Internal baffling helps maintain proper coolant flow
• Retains use of factory cap
• Improves engine bay aesthetics

⚠️ Fitment Note (IMPORTANT)

❗ Fits 2021–2026 Ford Bronco 2.3L & 2.7L ONLY
❗ Will NOT fit Bronco Raptor models
❗ Direct replacement for factory expansion tank
❗ Compatible with stock and modified setups
❗ Professional installation recommended

Eliminates a Known Weak Point

• Factory plastic tanks can crack and fail over time
• Aluminum construction eliminates this issue
• Improves long-term cooling system reliability

👉 Fix it before it fails

Built for Durability

• TIG-welded aluminum resists heat cycling
• Handles extreme off-road and engine bay conditions
• Designed for long-term performance

👉 Built to last

Improved Cooling System Function

• Internal baffling reduces coolant slosh
• Maintains proper coolant levels under load
• Helps prevent air entering the system

👉 More stable cooling performance

Show-Quality Engine Bay Upgrade

• Polished aluminum finish
• Transforms engine bay appearance
• Perfect for clean or show builds

👉 Performance + aesthetics

What’s Included

• Aluminum coolant expansion tank
• Mounting brackets
• Hardware
• Installation instructions

Specifications

• Material: Aluminum (TIG-welded)
• Finish: Polished
• Function: Coolant expansion tank replacement
• Install Type: Bolt-on
• Warranty: Mishimoto Lifetime Warranty

Installation

Direct bolt-on replacement
Reuses factory mounting points and cap
No cutting or modification required
Professional installation recommended
Typical install time: ~1–2 hours

Popular Vehicle Applications

👉 2021–2026 Ford Bronco 2.3L & 2.7L EcoBoost

Perfect for Bronco owners looking to improve cooling system reliability and upgrade engine bay aesthetics with a premium aluminum component.

👉 Must-have reliability upgrade for any Bronco build

Why Buy from Iron Ridge Offroad

✔ Fast Shipping
✔ Authorized Mishimoto Dealer
✔ Fast Processing
✔ Off-Road Experts You Can Trust

Upgrade your Bronco with the Mishimoto Aluminum Expansion Tank (MMRT-BR-21P) a simple but critical upgrade that improves durability, cooling system stability, and under-hood appearance.