Standard Ignition AX139 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Mazda 6

Standard Ignition AX139 is an ambient air temperature sensor for select Mazda 6 models from 2003-2008. It provides a direct-fit replacement for vehicles that need accurate outside air temperature input for HVAC and display functions. The AX139 is built with a 2-terminal blade design, a female connector, and a black plug-in housing.

Key Features

• Ambient air temperature sensor for HVAC-related temperature sensing
• Fits 2003-2008 Mazda 6
• Standard Ignition AX139 replacement part number
• 2 terminals with male blade terminals and a female connector
• Round and square connector shape with plug-in attachment method
• Black sensor housing
• Sensor only; wiring harness not included
• No mounting bracket included

Detailed Description

Standard Ignition AX139 is an ambient air temperature sensor used to report outside air temperature to the vehicle system. On a Mazda 6, this signal can affect HVAC operation and the temperature reading shown to the driver. This part is a practical replacement when the original sensor is damaged, corroded, or no longer reading correctly. Standard Ignition AX139 also cross-references with 5S6162 for the same application.

Common Issues This Part May Solve

• Incorrect outside temperature display on the Mazda 6
• HVAC temperature readings that do not match ambient conditions
• Intermittent or failed ambient air temperature signal
• Sensor damage from road debris, moisture, or age
• Connector or terminal wear at the original sensor location

Installation Notes and Tips

Verify connector style, terminal count, and mounting location before installation. This AX139 uses a plug-in connection with a female connector and blade terminals, so the vehicle-side connector should match the original configuration. Inspect the harness and terminals for corrosion or looseness before installing the new sensor. Confirm fitment for 2003, 2004, 2005, 2006, 2007, and 2008 Mazda 6 models before ordering.

Quality Assurance

Standard Ignition replacement sensors are built to meet application-specific requirements for electrical connection and fitment. AX139 is listed for direct replacement use on the specified Mazda 6 model years.