Coolant Tank for 2010-2013 Mazdaspeed 3 / 2004-2013 Mazda 3

Coolant Tank for 2010-2013 Mazdaspeed 3 / 2004-2013 Mazda 3

Coolant Tank for 2010-2013 Mazdaspeed 3 / 2004-2013 Mazda 3

Regular price $229.99 USD

This item is sold out in Winnipeg. However, may be in stock at one of our warehouses! Email us to get an ETA!

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Many years ago, CorkSport released a coolant reservoir that we ended up discontinuing. But you asked for it to come back and we listened! Say hello to the new and improved coolant reservoir for the 2004-2013 Mazda 3 and the 2010-2013 Mazdaspeed 3. We went back to the drawing board to optimize the design and manufacturing to ensure the best tank for your 3. With a proper internal baffling system and durable aluminum structure, it is a welcomed replacement to your yellowing, rotting plastic tank. Finished in a wrinkle black powder coat, it will hold up to the test of time and look great while doing it! Check out the info below for full details and more pictures!



Optimized Design:

The CorkSport Aluminum Coolant Reservoir is designed to be the best coolant tank for your 3. As the Mazda 3 and MS3’s get older, the OEM plastic coolant tanks become more and more prone to failure. Aluminum is a much more reliable material for the constant pressure and temperature changes while also being resistant to any chemicals in your coolant. To really ensure OEM functionality, the CS Coolant Tank has internal baffling just like the OEM tank. This keeps air bubbles from entering the cooling system during aggressive driving!

MPS3 Coolant Expansion tank

Appearance Bonus:

The CS coolant res replaces your ugly, yellow OEM coolant tank with a sleek design that looks much better under the hood of your Mazda. The wrinkle black powdercoat looks at home in any engine bay, whether you are mostly stock or have custom powdercoated components all over. We even hid the mounting locations for an extra clean look.

Mazda 3 coolant tank upgrade

Usability Focused:

Upgrading to the CorkSport Coolant Tank does not come with the headaches that universal kits have. All the OEM coolant hoses are retained with no modifications needed while fill level is easily monitored with the sight tube at the front of the tank. We also switched to a more traditional radiator cap. This ensures great functionality and appearance, plus the ability to upgrade to a higher pressure cap if desired. Finally, the included overflow hose can easily be adapted to a catch tank if you’re racing your 3 in a series that requires it!

Mazdaspeed 3 coolant reservoir

Materials and Manufacturing:

Each CorkSport Coolant Reservoir is manufactured from laser cut and precision formed 11 gauge Aluminum. Each component is TIG welded together for the best appearance and strength. The included cap, sight tube, and fittings are all optimized for use under pressure and with the chemicals in automotive coolant. Finally, once assembled, we pressure test every tank to ensure there are no leaks.

Additional Features
    • Vehicle Fitment: 2010-2013 Mazdaspeed 3, 2004-2013 Mazda 3.
    • Radiator Cap: Includes a new 1.5bar Radiator Cap.
    • Designed in America: in Vancouver, Washington, in the Pacific Northwest.
    • CorkSport Service & Support: 2 year limited warranty, full color installation instructions, all necessary components, and knowledgeable telephone support at (360) 260-2675.

  • The CorkSport Coolant Reservoir will be hot after engine operation. Use caution if working near the tank shortly after the vehicle was running.


How To Install Your Mazdaspeed 3 and Mazda 3 Coolant Reservoir

It will take you 30 Minutes to install the CorkSport Coolant Revervoir with our easy-to-use instructions.


30 Minute Install Time

30 Min Install Time

Difficulty: 2/5

2/5 Difficulty

2-Year Warranty

2-Year Warranty



View Instructions

Tracking will be sent once it leaves our warehouse.

For Canadian shipments, if the item is at a US address, the item needs to be brought into our Winnipeg warranty prior to shipping out to the destination.

Tracking information will be received once it leaves Winnipeg.

Please note, average turn around time for this is roughly 2 weeks, if the product is in stock.

Absolutely NO refunds/exchanges on special order items. If return of a non special order item is requested, customer must pay shipping and it must be requested within 14 days of purchase. 

Any orders not picked up by the customer within 15 days after notification of arrival becomes property of OSS Motorsport Ltd. no credit or refund will be given.

Customers that remove product(s) from OSS Motorsport will have been deemed to agree with all of the above terms and conditions. All items sold are for Off Road Use Only.

All performance modifications are done at your own risk and may void your warranty.


Unwanted items are subject to a 20% restocking fee, in addition to the return shipping to our warehouse(if applicable). Used items cannot be returned.


All Electronics are final sale!


Please have your mail box or junk mail box checked for status updates.

Shipments, returns & refund

During the payment process, we provide delivery options with different delivery companies with which we have no contractual relationship. We offer commission free this added service so the client can receive its order without having to round trip to our warehouse. If there is any problem with the delivery, it is the consignee responsibility to contact the delivery company he/she dealt with directly. The carrier provide a limited insurance of 100$. If you need more, please contact us prior to purchase as we will get you the quotation for extra insurance from the carrier you will select.

NO return accepted. Exchange upon approval and proof of factory default.

Partial or full refund requests are subject to 5% administrative fees. Refund is immediately issued upon cancellation and a confirmation email is sent. However, depending on the payment method used, it may take one (1) to ten (10) days for the refund to appear in client account.

Special orders are non-refundable.

United States orders may be subject to Custom fees and tax as we ship from Canada. 


Some products may be used for off-road only. Customer is responsible to check with his/her local/state laws and ordinances.

We are not responsible if the client ordered the wrong item, which does not work on its vehicle.

All parts required professional installation, there is no return or exchange if the client does not know how to install it him/herself.

OSS Motorsport is not responsible for defective or damage caused by unprofessional installation or misuse of the product.

Privacy Policy

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