Standard Ignition AX-311 A/C Evaporator Temperature Sensor

Standard Ignition AX-311 A/C Evaporator Temperature Sensor

Standard Ignition AX-311 is an A/C evaporator temperature sensor built for direct replacement in select Audi climate control systems. It monitors evaporator temperature to help the HVAC system regulate cooling performance and reduce the risk of evaporator freeze-up.

Key Features

• Part type: A/C evaporator temperature sensor
• Connector type: plug in with rectangular connector shape
• 2 terminals with blade terminal type
• Female connector gender and male terminal gender
• Direct-fit replacement for select Audi A8 Quattro and Audi S8 applications
• Standard Ignition part number AX-311

Detailed Description

This evaporator temperature sensor is used in the HVAC system to report evaporator temperature to the control module, helping maintain stable cabin cooling performance. It is a direct replacement for Audi A8 Quattro models from 2004-2013 and Audi S8 models from 2007-2009 and 2013. This Standard Ignition AX-311 sensor is also cross-referenced to OE-style part numbers such as 4E0820539 and TS57438 for the same application.

What It Helps Address

• Erratic A/C cycling caused by inaccurate evaporator temperature readings
• Evaporator icing or freeze-up conditions
• Weak or inconsistent cabin cooling performance
• HVAC fault codes related to evaporator temperature sensing
• Climate control response issues in Audi A8 Quattro and Audi S8 systems

Installation Notes and Tips

Verify the connector style, terminal layout, and vehicle application before installation. This sensor uses a rectangular plug-in connector with 2 blade terminals, so matching the original connector is important for proper fitment. For Audi A8 Quattro and Audi S8 HVAC repairs, compare the original sensor location and connector orientation before replacing the part.

Quality Assurance

Standard Ignition is a long-established aftermarket brand known for electrical and engine management components. AX-311 is built as a replacement sensor for the specified Audi applications and is intended to restore proper evaporator temperature signal input to the HVAC system.