Subaru OEM Throttle Body Coolant Hose (15-21 WRX) | 21204AB281

Overview

The Genuine Subaru OEM Throttle Body Coolant Hose (Part #21204AB281) is an exact-fit factory replacement hose designed specifically for 2015–2021 Subaru WRX models. This hose routes engine coolant through the throttle body to prevent icing and maintain proper throttle response in cold conditions. Choosing a genuine OEM part ensures perfect fitment, factory-grade durability, and compatibility with your WRX's cooling system without modification.

Key Features & Benefits

• Genuine OEM Quality – Manufactured to Subaru's exact factory specifications, ensuring reliable performance and longevity comparable to what came on your WRX from the factory.
• Exact Fitment Guaranteed – Engineered specifically for 2015–2021 WRX applications; no trimming, adapters, or modifications required.
• Factory-Grade Materials – Constructed from OEM-spec rubber compounds rated to handle engine coolant temperatures, pressures, and the underhood environment of the FA20DIT turbocharged engine.
• Throttle Body Icing Prevention – Maintains coolant flow through the throttle body to prevent ice buildup and ensure consistent throttle response in cold climates.
• Backed by Subaru's Factory Warranty – Genuine Subaru parts are covered under Subaru's OEM parts warranty for added peace of mind.
• Direct OEM Replacement – Ideal for restoring a cracked, leaking, or degraded coolant hose to factory condition.

What's Included

• 1x Genuine Subaru Throttle Body Coolant Hose (Part #21204AB281)

Specifications

Fitment & Compatibility

This Genuine Subaru OEM Throttle Body Coolant Hose is compatible with the following vehicles:

Always verify your vehicle's model year and engine before ordering. Part number 21204AB281 is the confirmed OEM reference for this application.

Installation

This throttle body coolant hose is a direct OEM replacement and installs in the same location as the factory hose. Basic mechanical experience and standard hand tools are sufficient for most home mechanics; however, the cooling system must be partially drained prior to hose replacement. Ensure the engine is fully cooled before beginning work. Refill and bleed the cooling system after installation per Subaru's service manual specifications. Professional installation is recommended if you are unfamiliar with cooling system service.