X AUTOHAUX Heater Control Valve 4H0-121-671-D Black 4.33″ Metal

Description

Product Overview

The X AUTOHAUX Heater Control Valve is engineered to replace the original hot water valve in a wide range of Audi vehicles. Measuring 4.33 inches, the valve combines a metal housing with high‑temperature resistant plastic components to withstand the demanding environment of the engine bay. The integrated solenoid provides electronic control, allowing the vehicle’s climate system to modulate coolant flow through the heater core with greater precision than older mechanical designs. With a weight of just 14.4 ounces and compact dimensions of 4.37 x 3.98 x 3.11 inches, the unit installs easily into the factory mounting location. The black finish matches OEM aesthetics while the robust construction ensures long‑term durability.

Usage

Designed for Audi A3 (2015‑2020), A4 (2018‑2019), A6 (2012‑2018), Q3 (2015‑2018), Q5 (2013‑2019), Q7 (2013‑2020), Q8 (2019‑2020), S3 (2015‑2020), and S6 (2013‑2018) models, this valve restores proper heating performance after winter service or after a failed original valve. It is ideal for owners who experience weak cabin heat, uneven temperature distribution, or coolant leaks from the old valve. Installation requires basic hand tools and a compatible O‑ring kit; no additional batteries or external power sources are needed. The valve integrates with the vehicle’s existing electronic control module, making it suitable for both DIY enthusiasts and professional technicians.

Why Choose Us

X AUTOHAUX is a recognized supplier of automotive replacement parts, and this heater control valve reflects the brand’s commitment to quality and fit‑for‑purpose engineering. Each unit undergoes rigorous testing for flow accuracy, temperature tolerance, and corrosion resistance. The valve’s original‑size design eliminates the need for custom brackets or adapters, ensuring a direct bolt‑in replacement. Our after‑sales support includes a 12‑month limited warranty and access to detailed installation videos, giving customers confidence throughout the repair process.

Key Features

• Precise electronic control for consistent cabin heating
• Durable metal housing with high‑temperature plastic internals
• Exact OEM dimensions for a seamless bolt‑in fit
• Lightweight design reduces strain on mounting points
• 12‑month warranty and dedicated technical support

FAQ

Will this valve fit my 2017 Audi Q5?

Yes, the valve is listed as compatible with Audi Q5 model years 2013‑2019, so a 2017 Q5 is covered.

Do I need any special tools to install the valve?

Standard hand tools such as a socket set and torque wrench are sufficient. An O‑ring kit is included for a proper seal.

Is the valve compatible with the vehicle’s existing climate control module?

Absolutely. The solenoid is designed to communicate with the factory electronic control unit, requiring no additional wiring.

What is the warranty period for this product?

X AUTOHAUX provides a 12‑month limited warranty covering defects in materials and workmanship.

Can I use this valve on non‑Audi vehicles?

The valve is engineered specifically for the Audi part numbers listed. While it may physically fit some other makes, we recommend using the correct OEM‑specified part for optimal performance.