








🚗 Keep your Ram cool and cruising—upgrade with confidence!
The TRQ Radiator Coolant Reservoir Expansion Tank is a direct-fit replacement part designed for 2013-2018 Ram 2500, 3500, 4500, and 5500 trucks with 6.7L engines. Featuring a 21 PSI pressure-rated cap, integrated level sensor, and pre-assembled components, it ensures easy installation and reliable cooling system performance. Supported by TRQ’s extensive DIY video library and 25+ years of trusted automotive parts expertise.





| Manufacturer | TRQ |
| Brand | TRQ |
| Model | TRQ ECA56421 Coolant Reservoir |
| Item Weight | 4.54 pounds |
| Package Dimensions | 18 x 13 x 11 inches |
| Item model number | ECA56421 |
| Exterior | Machined |
| Manufacturer Part Number | ECA56421 |
C**K
Quality Part! Great Fit!
Great fit! Quality part! Much better than the 25$ one I bought earlier that didn't fit. Seems to be holding up well too!
C**S
A good middle $ purchase.
Got this because I hate the cheaper brands (not naming names). So far it is holding fluid and is clean and durable. It fit right onto the Jeep, a Grand Cherokee Laredo 2003. The sensor fit right in snug and it looks great. It is so far worth what they had it priced at and so far it works great.
M**H
Correct size and fit!
Fits and quality
G**D
Awesome Part , And Awesome Price also quick delivery
It was a perfect fit in my 2010 Lexus RX350 . And the cost awesome here on Amazon cause the dealership wanted a $125.00 for the same part . And is was a good value for my money . And Easing to install in matter of minutes also it is Durability. Heat level . And another thing it was a very quickly delivered and if I needed another one I will buy it again great price and product
L**O
Great fit
I have bought a few items from TRQ recently for my 2001 infiniti I30 and have had good look with them. This particular product fit exactly like factory. The only thing I didn't like was the cap. It seemed made thinner than the OE part. I reuse the factory cap. The replacement cap would work fine but I just happened to preferred the OE.
W**R
OK so far for an aftermarket replacement despite not keeping sensor triggered
Have had to replace this on my DeVille a couple of times. None of the aftermarket replacements seem to last. This one seems to be a little thicker and may hold pressure a little better. Unfortunately the magnet embedded inside the reservoir attached to the float is not as strong as it should be so it doesn't magnetize the sensor when the reservoir is full. It seems to work when the reservoir is out of the car and flipped upside down but not actually using it in the car when the reservoir is full of coolant. I've had to short the wires on my sensor so the low coolant light doesn't come on. Wish I still had the original reservoir and just tried cleaning it out instead of replacing.
C**W
Chat GPT told me to buy this.
ChatGPT seemed tit hunk I needed a replacement coolant reservoir due to its perception my original had a hairline crack. It didn’t. That said, it was super easy to install and in fact does match the OEM product precisely.
J**S
2 yr Warranty
Well made and was a excellent fit...im glad this one has a 2yr manufacturer warranty.
Trustpilot
2 weeks ago
1 month ago