Standard Ignition AX-326 Cabin Air Temperature Sensor

Cabin Air Temperature Sensor for Audi HVAC Systems

Standard Ignition AX-326 is a cabin air temperature sensor used in Audi climate control systems to monitor interior air temperature and support accurate HVAC regulation. It features a 2-terminal design with a black rectangular plug-in connector for direct sensor replacement in the original location.

Fits 1998-2012 Audi A6, Audi A6 Quattro, Audi S6, and Audi R8 applications listed below, including center sensor and straight-connector configurations where specified. This part cross-references 4F0820539A and TS57453 for the same application.

Key Features

• Standard Ignition AX-326 cabin air temperature sensor
• 2 terminals with male blade terminals
• Female rectangular plug-in connector
• Black finish
• Sensor only; no wiring harness included
• No mounting bracket included
• Direct-fit HVAC sensor replacement for select Audi models

Detailed Description

The AX-326 is a cabin air temperature sensor that helps the HVAC control system read interior temperature data and adjust climate output accordingly. It is built with one rectangular connector, female connector housing, and male blade terminals for a straightforward electrical interface. Use this sensor when replacing a failed interior temperature input on Audi A6, A6 Quattro, S6, or R8 vehicles with the listed factory configurations.

What It Helps Address

• Incorrect cabin temperature readings
• HVAC systems that blow air too warm or too cold
• Climate control response that does not match cabin conditions
• Faults related to the interior temperature sensor circuit
• Loss of stable automatic temperature regulation

Installation Notes and Fitment

• Fits 2008-2012 Audi R8, N/A
• Fits 2010-2011 Audi A6, N/A
• Fits 2005 Audi A6, N/A
• Fits 2001-2002 Audi A6, N/A
• Fits 2010-2011 Audi A6 Quattro, N/A
• Fits 2005 Audi A6 Quattro, N/A
• Fits 2003 Audi A6 Quattro, N/A
• Fits 2001 Audi A6 Quattro, N/A
• Fits 2007-2011 Audi S6, N/A
• Fits 2006-2009 Audi A6, N/A, Center Sensor
• Fits 2006-2009 Audi A6 Quattro, N/A, Center Sensor
• Fits 2004 Audi A6 Quattro, N/A, Center Sensor
• Fits 2002 Audi A6 Quattro, N/A, Center Sensor
• Fits 1998-2000 Audi A6 Quattro, N/A, Center Sensor
• Fits 2003-2004 Audi A6, N/A, w/ Straight Connector

Verify the connector style, sensor location, and vehicle-specific HVAC layout before installation. Match the original connector shape and terminal layout to the removed part for proper fitment on Audi A6, Audi A6 Quattro, Audi S6, and Audi R8 applications.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. AX-326 is built as a replacement cabin air temperature sensor for the listed Audi applications and is identified by OE-style cross references including 4F0820539A and TS57453.