LoloWheat Engine Coolant Overflow Reservoir for Hyundai Tucson 2016-2021 1.6L/2.0L with Cap OEM Fit

If your 2016–2021 Hyundai Tucson is showing coolant leaks, low coolant warnings, or a cracked overflow bottle, this LoloWheat replacement tank is engineered to match the OEM fit and function for 1.6L and 2.0L engines. Manufactured to the listed part numbers (25431D3600 / 25431-D3600 / HY3014120), the tank comes complete with cap and is designed for direct replacement on multiple Tucson trims so you can get back on the road with confidence.

Will this reservoir fit my Hyundai Tucson model and engine?

Yes — this tank is intended for Hyundai Tucson models from 2016 through 2021 equipped with the 1.6L (1956cc) or 2.0L (1999cc) engines. It covers a wide range of trims used during those years, matching the original mounting points and hose connections for a straightforward swap.

• Compatibility: Hyundai Tucson 2016–2021 (1.6L and 2.0L engines)
• Included part numbers: 25431D3600, 25431-D3600, HY3014120
• Trim coverage: Essential, SE, GLS, GLS Premium, Preferred, Sport, Value Edition

How difficult is installation and what do I need?

Installation is designed to be simple for someone with basic mechanical experience: unclip and remove the old bottle, detach hoses, and install the LoloWheat tank in the reverse order. While many DIYers can complete the swap with common hand tools, professional installation is recommended if you’re unsure or to ensure proper coolant bleeding.

• Tools typically required: pliers, screwdrivers, socket set
• Process: drain a small amount of coolant, disconnect hoses, replace tank, reconnect and refill
• Tip: have replacement coolant and a proper bleed procedure handy

What does the package include and what should I inspect on arrival?

The product ships with one replacement engine coolant overflow reservoir tank and cap. On receipt, inspect the tank for shipping damage, verify the part number on the item, and confirm the cap seals properly before installation to avoid leaks or pressure loss.

• Package contents: 1 x coolant overflow reservoir tank (with cap)
• Check for: cracks, proper hose ports, and secure cap fit
• Contact: LoloWheat support within 24 hours for any issues or questions

How does replacing the reservoir help my vehicle’s cooling system?

A sound overflow reservoir restores the cooling system’s ability to capture expanding coolant and return it to the radiator as temperatures change. Replacing a damaged or leaking tank prevents coolant loss, reduces the risk of overheating, and helps maintain proper coolant level readings.

• Prevents coolant leakage and low-level warnings
• Ensures correct coolant expansion and return during thermal cycles
• Helps maintain correct pressure behavior and system reliability

Who is this for: This LoloWheat 25431D3600 replacement reservoir is intended for Hyundai Tucson owners, mechanics, and DIY enthusiasts who need a dependable, OEM-compatible overflow bottle for 2016–2021 Tucson models with 1.6L or 2.0L engines. It’s especially suited for vehicles with visible tank damage, persistent coolant-level issues, or anyone performing scheduled maintenance and seeking a direct-fit replacement that follows the original part numbers.