Four Seasons 74913 HVAC Heater Control Valve

Four Seasons 74913 Heater Valve Overview

Four Seasons 74913 is an HVAC heater control valve for vehicles that use a vacuum-closing, non-bypass design. It is an OE replacement heater valve built for temperature control in the heating system, with fitment for select Audi and Volkswagen applications.

The Four Seasons Heater Valve line focuses on direct-fit HVAC temperature control components, and this part follows that approach for service replacement on the listed vehicles. If you are replacing a vacuum-operated heater valve on an Audi Q5, Audi Q7, Audi S4, Audi S5, Audi A5, Audi A5 Quattro, or Volkswagen Touareg, part number 74913 is the relevant OE-style option.

Key Features

• Vacuum closes non-bypass heater valve design
• OE replacement part for HVAC temperature control service
• Non-bypass style for systems that route coolant through the heater circuit as specified
• Four Seasons Heater Valve product line component
• Part number 74913 for direct identification

Detailed Description

This HVAC heater control valve regulates coolant flow through the heater circuit based on vacuum signal operation. The vacuum-closing, non-bypass configuration is used in systems that require the valve to close under vacuum rather than divert flow through a bypass path. Four Seasons 74913 is listed for 2010 Audi A5 and A5 Quattro, 2010-2011 Audi S4 and S5, 2011-2012 Audi Q5 and Q7, and 2011-2017 Volkswagen Touareg. This part cross-references URO 1J0819809 for the same application.

What It Helps Address

• Inconsistent cabin heat from a heater valve that no longer opens or closes correctly
• Coolant flow control issues in the HVAC heater circuit
• Temperature output problems tied to vacuum-operated heater valve failure
• Loss of proper heater performance in Audi and Volkswagen HVAC systems
• Replacement needs for an OE-style non-bypass heater control valve

Installation Notes and Tips

Verify the vehicle’s HVAC system uses a vacuum-closing, non-bypass heater valve before installation. Match the original connector, hose routing, and vacuum control layout to the removed part, and confirm fitment against the listed model year before service. This part is listed for the following applications: Fits 2011-2017 Volkswagen Touareg, Heater Valve; Fits 2011-2012 Audi Q5, Heater Valve; Fits 2011-2012 Audi Q7, Heater Valve; Fits 2010-2011 Audi S4, Heater Valve; Fits 2010-2011 Audi S5, Heater Valve; Fits 2010 Audi A5, Heater Valve; Fits 2010 Audi A5 Quattro, Heater Valve.

Quality Assurance

Four Seasons supplies OE replacement HVAC components, and this heater valve is cataloged as a direct replacement part for the listed Audi and Volkswagen applications. Part number 74913 is also referenced under 802535 and 701819809G for identification during parts lookup.