Mishimoto Aluminum Coolant Expansion Tank – Ford Bronco (Wrinkle Black)

2021–2026 Ford Bronco 2.3L / 2.7L EcoBoost | Micro-Wrinkle Black | Part Number: MMRT-BR-21MWBK

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

The OEM expansion tank is known to crack over time due to heat cycling and pressure. This Mishimoto upgrade features fully TIG-welded aluminum construction, providing superior strength and long-term durability, even in extreme off-road and high-performance conditions.

Finished in a micro-wrinkle black coating, this version delivers a stealth, OEM+ appearance that blends seamlessly into your engine bay.

Key Features

• Direct fit for 2021–2026 Ford Bronco 2.3L & 2.7L
• Part Number: MMRT-BR-21MWBK
• Micro-wrinkle black aluminum construction
• Replaces failure-prone factory plastic tank
• Fully TIG-welded for maximum strength
• Internal baffling improves coolant stability
• Retains use of factory cap
• OEM+ stealth engine bay appearance

⚠️ 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
• Aluminum construction prevents failure
• Improves long-term reliability

👉 Fix it before it fails

Built for Durability

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

👉 Built to last

Improved Cooling System Function

• Internal baffling reduces coolant slosh
• Maintains consistent coolant levels
• Helps prevent air entering the system

👉 More stable cooling performance

Stealth OEM+ Styling

• Micro-wrinkle black finish
• Blends seamlessly into engine bay
• Perfect for clean, factory-style builds

👉 Clean and subtle upgrade

What’s Included

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

Specifications

• Material: Aluminum (TIG-welded)
• Finish: Micro-wrinkle black
• 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 while maintaining a clean, stealth engine bay appearance.

👉 Best stealth reliability upgrade for Bronco builds

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-21MWBK) a durable, stealthy upgrade that improves reliability and cooling system performance.