2014-2016 Jeep Grand Cherokee WK2 Coolant Expansion Tank Mopar Overflow Reservoir OEM 55037999AI

This is a genuine Mopar coolant expansion tank (overflow reservoir) for the 2014-2016 Jeep Grand Cherokee WK2 3.0L V6 Turbo Diesel, AI revision. The tank is made from translucent polypropylene plastic, which has yellowed from age and use. It features two mounting tabs with holes for secure installation, two hose connectors (one on the top and one on the side), and a metal cap with a clear warning text and a pressure rating of 100 kPa. The Pentastar logo and casting code are visible on the housing, confirming its authenticity. The attached hose and plastic support bracket are included. The tank has a capacity of approximately 1.75 L and weighs around 2 lb. The condition is used, with visible discoloration but no cracks or structural damage.

Fitment notes

Researched from the part numbers and the donor car.

Two researchers agreed on 1 of 1 vehicles in round 2.

Sources: Mopar parts catalog (store.mopar.com) lists part 55037999AI for 2014‑2016 Jeep Grand Cherokee with 3.0 L V6 EcoDiesel; dealer OEM diagrams and ovoko.fr listings confirm the same OEM number for those model years and engine. / The available Mopar catalog identifies the exact 55037999AI revision as superseded by 55037999AJ and lists the application as the 2014–2015 Jeep Grand Cherokee with the 3.0L V6 turbo-diesel engine; no reliable source shown here confirms 2016–2022 Grand Cherokee or any Dodge Durango uses this exact reservoir, and later-year listings may describe a different-generation or superseding design.

Removed from a 2015 Jeep Grand Cherokee.

Fits:

• 2014-2016 Jeep Grand Cherokee — Altitude 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated 4WD (2014); Altitude 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated RWD (2014); High Altitude 5.7L 345Cu. In. V8 GAS OHV Naturally Aspirated 4WD (2016); High Altitude Sport Utility 4-Door 5.7L 345Cu. In. V8 GAS OHV Naturally Aspirated 4WD (2015); Laredo 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated 4WD (2014); Laredo 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated RWD (2014); Laredo E 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated 4WD (2014); Laredo E 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated RWD (2014); Limited 3.0L 2987CC 182Cu. In. V6 DIESEL DOHC Turbocharged 4WD (2014-2016); Limited 3.0L 2987CC 182Cu. In. V6 DIESEL DOHC Turbocharged RWD (2014); Limited 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated RWD (2014); Limited 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated 4WD (2014) and 34 more

Interchange part numbers: 55037999AI

Please match the part number 55031999 to your original before buying.