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Mishimoto Aluminum Coolant Expansion Tank (15-19 GT, EcoBoost, V6)

Market Price $211.99 You Save 17% ($35.74)
Our Price

$176.25 (each)

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  • Item 389661
  • MPN# MMRT-MUS-15E

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    Features, Video & Details

    • Stronger Than Plastic Factory Tank
    • One-Piece Design
    • Polished Finish
    • Aluminum Construction
    • Fully TIG Welded for Durability
    • Includes Sight Tube for Coolant Level
    • Direct Fit Replacement
    • Reuses Stock Overflow Cap
    • Fits 2015-2019 GT, EcoBoost and V6 Mustangs

    Review & Installation Video

    Review & Install Video

    Hey guys. Stephanie with AmericanMuscle.com, here with a Mishimoto Aluminum Coolant Expansion Tank for 2015 and up Mustangs. The Mishimoto Aluminum Coolant Expansion Tank is perfect for those S550 owners out there that are looking for some underhood improvements. The factory coolant expansion tank is plastic, and it looks like a bubble which can leave a lot to be desired in the looks department, especially over time. The Mishimoto tank is not only more attractive, making for a better appearance, but it's also more durable and stronger than the factory plastic tank as well. Just looking at the Mishimoto tank here you can see that it's an obvious appearance upgrade right away. It has an attractive one-piece design instead of the stock two-piece design, and it's made from aluminum, and it has lovely welds on it. Even though this tank is powder coated black, the welds are obvious, and Mishimoto doesn't look like they were rushing when they were building this tank. If you weren't that into the black, Mishimoto does offer the same tank with a polished aluminum finish if you prefer that instead, or you always have the option of powder coating it your own color. These tanks are TIG welded which will give strength and durability, and the aluminum will be stronger than the factory plastic tank. So not only will this tank offer an appearance upgrade but it will also be more durable and hold up better than a plastic tank, especially in high performance applications. Like the factory tank, this tank also has internal baffles. The internal baffles will keep the coolant from sloshing around, so this means during braking or high speed cornering, and since the coolant won't be sloshing around it will stay close to the overflow cord therefore helping to prevent coolant starvation and air from entering the system. Another cool thing this tank has is a sight tube. The sight tube allows you to keep an eye on your coolant level at a glance, which is important since this tank is a solid blacked-out tank. This thing will be your new best friend. The tank will come complete with an overflow nipple on the fill neck so you can attach more reservoirs if necessary. It's also a direct fit replacement that's going to work on an S550 V6, Ecoboost and GT so you won't have to worry about making room for this tank, and it reuses a stock overflow cap as well. As far as price, you're looking at spending just over $175 for this tank. The polished aluminum version is the same price so you'll have a choice of which you like better. The tank is nicely made and has some nice features like the hot and cold fill lines, and at the end of the day you're investing in an item that will improve both looks and it will last longer than the factory plastic tank. The install for this overflow tank is very easy. I mentioned that it's a direct bolt-on replacement, which means that it will just take the place of the factory overflow tank, and it does reuse the factory cap. You won't need any special tools to complete the install, just a few sockets, a flat head and hose clamp removers, and it will take less than an hour to complete, and I'm going to call it a one out of three wrenches on the difficulty meter. You will want to drain some of the coolant so you can pull up your stock expansion tank, so having some extra coolant to fill up with is a good idea. The factory tank uninstalls by removing 3 hoses and 2 10 millimeter bolts. It doesn't get much easier than this here. You can clamp your hose down if you want to make sure you don't leak any coolant, and the new tank installs the same way the factory one came out. One hose on the bottom, two bolts on the fan shroud and two hoses on the top of the tank. The stock cap can then be installed, and the install can be finished by topping off and bleeding the coolant system. Wrapping things up here, the Mishimoto Aluminum Coolant Expansion Tank will help you add some additional reliability by upgrading the materials of the expansion tank. It will also add some styling to the engine bay in either black or polished aluminum. It will eliminate the unattractive factory two-piece plastic tank and replace it with a single-piece design that utilizes a sight tube, and you can check it out more online right here at AmericanMuscle.com.

    High Performance. Add some additional strength and reliability to your 2015-2019 Mustang with this polished Mishimoto Aluminum Coolant Expansion Tank. Replace that weak plastic eye sore that came on your S550, which is known to fail in high temperature situations, with this TIG-welded aluminum beauty. Improve both your underhood styling and coolant tank longevity with this Coolant Expansion Tank by Mishimoto.

    Durable Construction. Fully TIG-welded for durability and crafted from high strength 100% aluminum, this Mishimoto Coolant Expansion Tank will be much stronger, not to mention better looking, than the factory two-piece plastic tank. Featuring internal baffles to keep coolant from sloshing during high speed cornering, braking or acceleration, the baffles also help to prevent coolant starvation from the overflow ports on your S550 engine.

    Easy Installation. This Coolant Tank by Mishimoto has been designed as a direct fit replacement and comes complete with a sight tube to help keep an eye on your coolant levels at a glance. Complete with an overflow nipple on the fill neck to attach additional NHRA reservoirs if necessary, this tank comes with the necessary installation hardware for a simple install, taking just under an hour.

    Application. This polished Mishimoto Aluminum Coolant Expansion Tank is designed to fit on 2015-2019 V6, GT and EcoBoost Mustangs and reuses the stock overflow tank cap.

    Fitment: 2015 2016 2017 2018 2019 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (1) Polished Expansion Tank
    • (1) Sight Glass Tube
    • (1) Overflow hose
    • (3) Worn-Gear Clamps
    • Mounting Hardware
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    Customer Photos (36) Submit Your Photo

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    Questions & Answers (18)

    5 Top Rated Questions

    Does this tank keep the new car warranty valid please?

    • The Magnusson Moss Warranty Act: US Code – Title 15, Chapter 50, Sections 2301-2312, was created to protect consumer warranties. According to this act, a manufacturer such as Ford cannot void the warranty of a vehicle due to the use of an aftermarket part unless they can prove the aftermarket part directly cause or contributed to the failure of the vehicle.

    Helpful (3)

    Will this work with the performance package since it comes with an already upgraded coolant tank?

    • The Mishimoto Aluminum Coolant Expansion Tank can be used on the Performance Package GT Mustangs from 2015-2018.

    Helpful (2)

    I have a 2016 Mustang GT with a Roush supercharger. I believe I saw a pic with same configuration but wanted to make sure this will fit.

    • The Mishimoto Aluminum Coolant Expansion Tank will work with your Roush Supercharger.

    Helpful (2)

    CAN THIS TANK BE USED ON A 2016 GT 350?

    • The Mishimoto Aluminum Coolant Expansion Tank will fit the GT350 Mustang.

    Helpful (0)

    Can it be painted?

    • While this is aluminum this could be painted by scruff sanding the surface.

    Helpful (0)
    Post Your Question
    10 More Questions
    Would this work for 03 mach1 that has a SC coyote swap? 1 answer
    My cap will not screw on all the way is that a problem? 1 answer
    Does anyone know if this tank would be compatible with the Injen evolution CAI for the 15-17 GT's? It looks like the vacuum line on that cai sticks out a fair amount. 1 answer
    Does the new mishimoto tank give a cold fill line and max fill line according to the engine your buying for?? 1 answer
    Any plans for an S197 version, 2011-2014 5.0? 1 answer
    I have two tanks, one for engine one for Roush Supercharger. Can I get two of these to replace both plastic tanks? 1 answer
    Will this work with an Airaid CAI? 1 answer
    Would assume it also fits a GT350? Thanks! 1 answer
    Has anyone ever installed this with a PMAS CAI? 1 answer
    Can someone give me the dimensions to this? 1 answer

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.6

    out of 5 stars




    • 5/5

      December 04, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Nice!

      It make engine bay look custom. I don't have no problem installing it. Also if you plan on install this item make sure have enough coolant because I have to add some coolant.

      TerminatorT500

      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      November 19, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Great quality, features, fitment!

      Just like the headline says, plus I like the extra capacity and sight tube. Easy install.

      CarlZ

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      November 12, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Great piece

      It's completely cosmetic but worth every penny. Removes the out of place looking factory unit and looks like the one Ford should have used.

      Michael

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      November 10, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Great product

      This is a really clean addition to the engine bay. Has nice welds, and the sight tube makes it easy to keep tabs on your coolant level. Really easy install, just take your time to not pour coolant all over your clean engine bay.

      JoshS

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      November 03, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Adds Pop To Engine Bay!

      I installed this expansion tank earlier today and I have to say that I am very pleased with the look. So much better than the stock expansion tank! I have a 2018 GT PP1 and did have to remove the engine cover in order to fit the tank just right. This tank comes with an overflow hose that the stock tank does not have.

      RobertM

      Year: 2018 Submodel: GT

      Helpful (1)

    • 5/5

      October 28, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Looks way better than the "football"

      Neither my wife or I could stand the factory reservoir and the way it stood out when the hood was open. This reservoir really looks nice, and increases the coolant capacity a bit also. I didn't have any issues with the cap being any more snug than the stock setup. Install is straight forward.

      RobertJ

      Year: 2017 Submodel: EcoBoost

      Helpful (2)

    • 2/5

      October 26, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      One of the unlucky

      Purchased this from A*zon and had it professionally installed. One day later, I had a massive leak. Puddles of coolant under the car, all over my belts, no interior heat, and over heating cyl head temps. I had it checked and rechecked to no avail. Submitted a request on Mishimotos website for assistance, its been a week and no one has responded to me. Ultimately had to go back to the stock setup. Sometimes, if it isn't broken, don't fix it. Very disappointed in the lack of support I received from M. One additional star for looks...

      Brian

      Year: 2015 Submodel: V6

      Helpful (2)

    • 5/5

      October 24, 2018

      Nice

      Mishimoto i just want to say thanks for this awsome item

      UsefM

      Year: 2015 Submodel: GT

      Helpful (1)

    • 1/5

      October 20, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      DO NOT BUY!

      I had the tank for three years and last week one of the welds let go, thus causing me to loose coolant. I was lucky that i spotted it before driving the car. Mishimoto has a HUGE PROBLEM here and needs to get their quality control problems fixed ASAP.

      P

      Year: 2015 Submodel: V6

      Helpful (2)

    • 5/5

      October 12, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Get this tank

      This expansion tank looks much better than the stock piece and was very easy to install. It really does make a big difference in the engine bay since the stock piece is so ugly and it right up front.

      fast88fox

      Year: 2016 Submodel: GT

      Helpful (4)

    • 5/5

      October 01, 2018

      Solidly built

      I chose the Mishimoto Coolant tank because of the ability to see the level of your coolant at a glance. Installation was easy enough, and the underhood appearance is tons better than the stock yellowing tank.

      Dominic

      Year: 2015 Submodel: EcoBoost

      Helpful (3)

    • 4/5

      September 16, 2018

      WG

      First unit had the overflow connection broken off, promptly received a replacement which installed easily. Radiator cap didn’t snap lock like the OEM but did line up and is secure.

      WaltG

      Year: 2017 Submodel: GT

      Helpful (2)

    • 4/5

      September 13, 2018

      Very Nice Expansion Tank

      This was a very nice add on to my under hood dress up! It was very easy to install and the fit and finish are absolutely great. The only reason I'm not giving this a 5 star rating is that the stock cap doesn't quite fit perfectly. It take a lot of muscle to get it close to all the way locked down. In the install video they had no issues so this just might be my tank or cap. Again great product I just wish the neck on the tank was a bit better fit for the stock cap.

      StephenH

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      September 10, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Great Product

      With this being the first "upgrade" that I got for under the hood I was very happy with it. It was easy enough to install to follow the instructions included. It changes the looks for under the hood from having the stock one to this black tank to match the rest of the motor.

      IanJ

      Year: 2018 Submodel: GT

      Helpful (2)

    • 5/5

      September 01, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Clean Look

      This was an easy install for a clean look! I really like that it takes away from the cheap look of the factory coolant tank.

      Amani

      Year: 2015 Submodel: EcoBoost

      Helpful (3)

    • 5/5

      August 27, 2018

      Quick and easy fit

      I purchased this at the American muscle car show back in June. Just got around to installing in my 2017 mustang. It went in very easily, did lose some anti freeze in the process of changing the tanks. So off to my local auto parts store to purchase some coolant. Told them the type of car and what motor was in it, I questioned them if it was the proper coolant. I had my doubts about it, called the help line on the jug and they said it was not the right coolant. Ended up at local ford dealer and got the right coolant. It cost a little more but in the long run it will save me from motor woes. P.S. looks Sharp as all get out under the hood.

      JosephB

      Year: 2017 Submodel: GT

      Helpful (3)

    • 4/5

      August 23, 2018

      Mishimoto aluminum coolant tank

      Very well made product. Looks so much better than that ugly stock plastic one. Then only reason I give it 4 stars and not 5 is because it dosen't come with a cap for the tank. But overall extremely happy with it.

      ChrisC

      Year: 2018 Submodel: GT

      Helpful (3)

    • 4/5

      August 16, 2018

      Fantastic fit/finish

      Product as advertised. Really changes the look under the hood, nice touch not over the top.

      jayfrom14211

      Year: 2015 Submodel: GT

      Helpful (3)

    • 4/5

      August 12, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      What an improvement!

      I love the way this looks. My only thing was the hose provided was much to long and does not bend the way the stock hose does. Luckily the stock hose fits on the tank just fine. The other thing is it did not come with enough clamps to change out all 6. No instructions in the box either but that is not a big deal. Minimal mess is made swapping parts out but should get some extra coolant just in case before you start.

      JustCallMeEVO

      Year: 2015 Submodel: GT

      Helpful (4)

    • 5/5

      August 05, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-19 GT, EcoBoost, V6)

      Perfect

      Perfect part. Easier installation. Just wish there was a matching cap.

      VernonH

      Year: 2017 Submodel: EcoBoost

      Helpful (4)

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