Skip to content
✅ ⚖️ Checks and Balances Sale - Shop Deals Now ⚖️ ✅
✅ ⚖️ Checks and Balances Sale - Click Here ⚖️ ✅
Rewards Program My Wishlist Customer Support Military Discounts Bread Pay® Financing Diamond Club Membership Subimods Premier Partners
Mishimoto Aluminum Coolant Expansion Tank 2002-2007 WRX / 2004-2021 STI - MMRT-WRX-01E - Subimods.com

Mishimoto Aluminum Coolant Expansion Tank 2002-2007 WRX / 2004-2021 STI

$168.95
$222.34
$222.34 - $222.34
$222.34
$168.95 - $168.95
$168.95
-24% -24%
6 In Stock, Usually Ships within 1-2 Business Days
SKU MMRT-WRX-01E
by Mishimoto

DETAILS

Add some additional reliability and engine bay styling with the Mishimoto Subaru WRX 2002–2007 / STI 2004–2014 Aluminum Coolant Expansion Tank. Stock coolant expansion tanks are prone to failure after years of constant temperature variations. The Mishimoto tank is constructed from durable, TIG-welded aluminum with barbed fittings for optimal durability and longevity. This expansion tank provides a 50% increase in capacity compared to the stock unit. It features a polished finish that will look great in your engine bay, and it matches the Mishimoto Subaru WRX/STI Performance Aluminum Radiator! The Mishimoto Coolant Expansion Tank is engineered for perfect fitment in the 2002–2007 WRX and the 2004–2014 STI!

Customer Reviews

Based on 9 reviews
100%
(9)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
J
JR
Expansion tank

Just installed, very easy be ready to cut som hoses especially if you upgraded to silicone as I did. Thanks guy fast shipping and quality products every time.

User picture

JR,

We are glad the expansion tank was easy to install and works well with your upgraded silicone hoses. Your continued support means a lot to us. Thank you for your 5 Stars!

Regards,

J
James
Aluminum Coolant Expansion Tank

Perfect addition to my Aluminum radiator!!

James,

Thank you for your 5 Star Review! We are glad to hear that the aluminum coolant expansion tank was the perfect addition to your aluminum radiator. We appreciate your support and hope it continues to serve you well.

Regards,

B
Brant Raynor
100% recommend

Really ties the engine bay together. I was tired of looking at the bulky plastic reservoir amongst all the aftermarket components installed. This was like the icing on the cake.

Brant,

Thank you for your 5 Star Review. We are thrilled that the Mishimoto expansion tank ties your engine bay together and replaces the bulky plastic reservoir so seamlessly. It is the perfect finishing touch for your setup!

Regards,

J
Joshua Medina

Works on 15 WRX STI great replacement from OEM plastic, no issues

Joshua,

Thank you for sharing! The Mishimoto Aluminum Coolant Expansion Tank was a great upgrade for your 2015 WRX STI, especially as a replacement for the OEM plastic one! Enjoy!

Regards,

W
William T. Galyean
Mishimoto Aluminum Coolant Expansion Tank

My '06 STI already has a Mishimoto radiator and I finally got tired of looking at the old, stock expansion tank. When it was time to do an oil change, coolant flush and switch to Mishimoto Liquid Chill, I figured it to be the perfect time to switch to the Mishimoto expansion tank.
Perfect fit, easy install and looks much better.

William,

Thank you for your 5 Star Review of the Mishimoto Aluminum Coolant Expansion Tank. We are so glad to hear that you are enjoying the upgrade for your STI and that it was a perfect fit during installation. We are sure it looks much better than the stock tank and we hope you continue to enjoy it. Happy driving!

Regards,

12

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare