Mishimoto · New

Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank

Name: Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank
Brand: Mishimoto
SKU: misMMRT-JL-18
Price: 370.00 USD

MPN MMRT-JL-18 · Store SKU misMMRT-JL-18

$370.00

IN STOCK22 ready to ship

Supplier stock checked 11/7/2026, 9:03:37 AM UTC. Adding a part does not reserve it.

30-day returns for unopened, unused new parts

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

Shipping & returns ↗This policy does not limit rights required by law.

Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.

Product details

Upgrade your Jeep Wrangler JL or Gladiator JT with an aluminum expansion tank built to withstand the toughest trails and daily driving. The stock plastic tanks in Wranglers are known for cracking and leaking at the seams. It is not a matter of if it will fail, but when. Replacing it with this TIG-welded aluminum tank ensures you are ready for your next adventure without worrying about coolant loss.--This coolant recovery tank increases fluid capacity over the factory design and features internal OEM-style baffling to prevent aeration and sloshing when your Jeep is off-camber or bouncing through rough terrain. The wrinkle black powder-coated finish not only adds corrosion resistance but also gives your engine bay a rugged, refined look. An easy-to-read sight glass replaces the factory dipstick, making fluid checks quick and straightforward.--Installation is simple and can be done before your next weekend trip, giving you peace of mind on and off the trail. Complete with a Mishimoto radiator cap and backed by our lifetime warranty, this aluminum expansion tank is the reliable upgrade every Wrangler and Gladiator owner needs. Engine coolant reservoir designed to store and regulate excess coolant for proper system operation. Durable construction resists heat and pressure, helping prevent leaks and maintain optimal temperature. Aluminum Expansion Tank, fits Jeep Wrangler 2018+ / Gladiator 2020+

Manufacturer fitment & guides

Check MMRT-JL-18 against the manufacturer’s application information below.

Part-specific notes

California Proposition 65: Y

Manufacturer documents

Installation Instructions

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What is the return policy?

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

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This policy does not limit rights required by law.

Mishimoto 18+ Jeep JL / 20+ JT (2.0L/3.6L/3.0L) Coolant Expansion Tank

Product details

Manufacturer fitment & guides

Part-specific notes

Manufacturer documents

THE NEXT PART
OF YOUR BUILD.

Free shipping on $100+ orders.

Build with the right brands.

Find your next upgrade.

Make the whole setup work.

A few things to know.

Your build.

Delivery & checkout

Delivery address