Subaru OEM Heater Hose - Outlet (05-07 WRX) | 72421SA033

Overview

The Genuine Subaru OEM Heater Hose – Outlet (Part #72421SA033) is an exact-fit factory replacement hose designed specifically for the 2005–2007 Subaru WRX. This heater outlet hose routes coolant from the heater core back to the engine, and using a genuine OEM part ensures precise fitment, factory-grade materials, and reliable long-term performance. Replacing a worn or leaking heater hose with the correct OEM component helps maintain proper cabin heating and overall cooling system integrity.

Key Features & Benefits

• Genuine Subaru OEM Quality – Manufactured to Subaru's exact factory specifications for guaranteed fitment and reliability on your 2005–2007 WRX.
• Exact-Fit Replacement – Designed as a direct drop-in replacement with no cutting, modification, or adapters required.
• Factory-Grade Materials – Constructed from heat-resistant, coolant-compatible rubber engineered to withstand the thermal demands of the WRX's turbocharged engine.
• Prevents Coolant Leaks – A properly seated OEM heater hose maintains a secure seal, reducing the risk of coolant loss and heater core damage.
• Backed by Subaru – Sourced directly through the Subaru parts network, this component meets OEM standards and carries Subaru's parts warranty.

What's Included

• 1x Genuine Subaru OEM Heater Hose – Outlet (#72421SA033)

Specifications

Fitment & Compatibility

This heater outlet hose is a direct OEM replacement for the following vehicles:

Always verify your vehicle's specific year, model, and trim before ordering. If you are unsure of compatibility, reference part number 72421SA033 against your vehicle's service manual or consult a Subaru dealer parts department.

Installation

This heater outlet hose is designed as a straightforward bolt-on (hose-on) replacement requiring basic hand tools, hose clamps, and fresh coolant for topping off after installation. Drain and safely dispose of the existing coolant before removal. While a mechanically inclined DIYer can complete this job, professional installation by a qualified technician is recommended to ensure proper torque on hose clamps and a leak-free seal. Always allow the engine to cool completely before working on any cooling system component.