Subaru OEM Heater Core Hose (17-23 Impreza) | 72421FL00A

Overview

The Genuine Subaru OEM Heater Core Hose (Part #72421FL00A) is an exact-fit replacement coolant hose designed specifically for 2017–2023 Subaru Impreza models. This factory-original hose ensures reliable coolant flow between the engine and heater core, maintaining proper cabin heating performance and preventing leaks that can lead to costly repairs. Choosing a genuine OEM heater core hose guarantees factory tolerances, materials, and durability — no modifications or trimming required.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to factory specifications for perfect fitment and long-term reliability, unlike generic aftermarket alternatives.
• Exact-Fit Design — Engineered specifically for the 2017–2023 Subaru Impreza; installs in minutes with no cutting, trimming, or adapters needed.
• Premium Hose Material — Built to withstand high coolant temperatures, pressure cycling, and the demanding conditions of the Impreza's cooling system.
• Leak-Free Performance — Precise OEM dimensions ensure a secure, sealed connection at both the heater core and engine coolant ports, preventing costly coolant loss.
• Factory Warranty Coverage — Backed by Subaru's genuine parts warranty for peace of mind.
• Direct OEM Replacement — Replaces worn, cracked, or leaking original hoses to restore proper heater and cooling system function.

What's Included

• 1x Genuine Subaru Heater Core Hose — Part #72421FL00A

Specifications

Fitment & Compatibility

This genuine Subaru heater core hose (72421FL00A) is compatible with the following vehicles:

Fits all trim levels of the 5th-generation Subaru Impreza (2017–2023), including Base, Premium, Sport, and Limited trims in both sedan and hatchback body styles. Always verify your specific VIN or consult your owner's manual to confirm fitment before ordering.

Installation

This is a direct OEM replacement heater core hose designed for straightforward installation. Basic mechanical experience is recommended — the job typically involves draining a portion of the coolant, releasing hose clamps, and swapping the old hose for this new one. We recommend having the cooling system inspected for related wear items (clamps, thermostat, coolant) while the system is open. Refer to the Subaru Impreza service manual for torque specs and proper coolant refill procedures.