Four Seasons 86304 Engine Coolant Filler Neck

Engine Coolant Filler Neck for Hyundai and Kia

Four Seasons 86304 is an engine coolant filler neck for vehicles equipped without a thermostat at the filler neck location. It is built for direct replacement service on select Hyundai and Kia applications, including the Hyundai Elantra, Elantra GT, Veloster, Veloster N, Kia Forte, and Forte5.

Use Four Seasons 86304 when replacing a damaged or leaking coolant filler neck on the cooling system. This part is listed as an engine coolant component and is identified as a coolant filler neck, making it a focused replacement for the original coolant fill point.

Key Features

• Engine coolant filler neck replacement
• Style: without thermostat
• Type: coolant filler neck
• Engine coolant component for cooling system service
• Direct-fit application for select Hyundai and Kia models

Product Details

Four Seasons Coolant Filler Neck 86304 is designed for cooling system repair where the original filler neck has cracked, warped, or begun to leak. The part line is focused on engine coolant components, giving technicians a replacement built around the coolant fill connection rather than a general-purpose hose or pipe. Compatible vehicle coverage includes 2017-2020 Hyundai Elantra, 2017-2020 Hyundai Elantra GT, 2019-2021 Hyundai Veloster, 2019-2021 Hyundai Veloster N, 2019-2020 Kia Forte, and 2020 Kia Forte5. This part cross-references Focus Auto Parts 86304 for the same application.

Common Problems This Part Can Address

• Coolant seepage at the filler neck
• Cracked or brittle plastic coolant connection
• Improper sealing at the coolant fill point
• Cooling system service issues caused by a damaged neck
• Loss of coolant from the upper fill area

Installation Notes and Tips

Verify the original part style before installation, especially the without-thermostat configuration. Inspect mating surfaces, hoses, and clamps for wear before reassembly, and confirm the replacement matches the vehicle’s cooling system layout. Fits 2019-2021 Hyundai Veloster, N/A; Fits 2019-2021 Hyundai Veloster N, N/A; Fits 2017-2020 Hyundai Elantra, N/A; Fits 2017-2020 Hyundai Elantra GT, N/A; Fits 2019-2020 Kia Forte, N/A; Fits 2020 Kia Forte5, N/A.

Quality Assurance

Four Seasons manufactures cooling system components for service replacement applications. Part number 86304 is cataloged as an engine coolant filler neck for the listed Hyundai and Kia vehicles.