Standard Ignition AX641 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Ford F-150

Standard Ignition AX641 is an ambient air temperature sensor built for direct replacement in the grille area of the 2018 Ford F-150. It uses a 2-terminal, plug-in oval connector and includes a mounting bracket for bolt-on installation.

Key Features

• Ambient air temperature sensor for HVAC and climate control input
• Fits 2018 Ford F-150, in grille
• Standard Ignition AX641 replacement part number
• 2 terminals with male pin terminals and female connector
• Oval connector shape with 1 connector and 1 port
• Bolt-on attachment method with mounting bracket(s) included
• Black finish for a clean OE-style appearance

Product Details

The Standard Ignition AX641 ambient air temperature sensor monitors outside air temperature and sends that information to the vehicle’s HVAC system and related controls. On the 2018 Ford F-150, in grille mounting helps the system read ambient conditions accurately for temperature display and climate operation. This AX641 sensor is a practical replacement when the original grille-mounted sensor is damaged, corroded, or no longer reporting correctly.

This part cross-references ATSA388 and DY1414 for the same application.

Common Problems It Can Help Solve

• Incorrect outside temperature readings on the dash or display
• HVAC temperature control that does not respond to ambient conditions
• Faults caused by a damaged grille-mounted sensor
• Connector or terminal wear at the ambient air temperature sensor
• Intermittent temperature signal loss from the front of the vehicle

Installation Notes and Tips

Verify the grille location and connector style before installation. The AX641 uses a plug-in oval connector with male pin terminals and a bolt-on mounting style, so the existing mounting point and bracket alignment should be checked during replacement. Confirm the sensor is seated securely and the connector locks fully into place. For the 2018 Ford F-150, in grille, inspect the harness and surrounding grille area for damage before installing the new sensor.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and sensor components, and AX641 is built to match the listed application details for a direct-fit replacement on the 2018 Ford F-150.