Standard Ignition AX138 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Chrysler and Dodge

Standard Ignition AX138 is a direct-fit ambient air temperature sensor for select Chrysler and Dodge HVAC applications. It is built with a black housing, round and rectangular plug-in connector design, and a bolt-on mounting style for straightforward replacement on the listed vehicles.

Compatible With 2001-2006 Dodge Caravan, 2002-2006 Dodge Grand Caravan, 2002-2004 Chrysler Town & Country, 2001 Chrysler Grand Voyager, 2001 Chrysler Town & Country, 2001 Chrysler Voyager, and 2001 Dodge Grand Caravan.

• Direct-fit OE replacement for ambient air temperature sensing
• Standard Ignition AX138 for HVAC temperature input service
• Bolt-on attachment with included mounting bracket(s)
• Black sensor body with female connector and male blade terminals
• Plug-in connector style with round and rectangular connector shape
• High-quality materials built for demanding underhood and exterior conditions

Detailed Product Overview

This ambient air temperature sensor helps the HVAC system read outside air temperature data for automatic climate control operation. Standard Ignition AX138 is engineered as an OE-style replacement and is listed for Chrysler and Dodge minivans including Caravan, Grand Caravan, Town & Country, Voyager, and Grand Voyager applications. The direct-fit design supports clean replacement on vehicles equipped with HVAC Automatic Temperature Control (ATC) relay with bracket configurations where noted.

This part cross-references Four Seasons 75963 for the same application.

Common Problems This Part Can Address

• Incorrect outside temperature display on the dash
• HVAC system reacting poorly to ambient temperature changes
• Automatic climate control readings that do not match actual conditions
• Faults related to the ambient air temperature sensor circuit
• Replacement needs after sensor damage from road debris or weather exposure

Installation Notes and Tips

Verify the connector style, bracket location, and vehicle application before installation. This sensor uses a bolt-on attachment method and a plug-in electrical connection, and the wiring harness is not included. Confirm the existing mounting point and terminal layout match the replacement part before final assembly.

Quality Assurance

Standard Ignition states that this sensor is manufactured with complete quality control throughout the production process and is tested extensively for reliability. The part is built from materials selected to withstand extreme operating conditions.