Standard Ignition AX18 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Chrysler and Dodge

Standard Ignition AX18 is a plug-in ambient air temperature sensor built for accurate temperature measurement and reliable HVAC system input. It uses a tight-tolerance thermistor response and factory testing to help maintain proper sensor operation in service applications such as Dodge Viper, Chrysler Concorde, and Dodge Caravan.

Key Features

• Plug-in ambient air temperature sensor design
• Female oval connector with 1 connector and 2 male pin terminals
• 18 mm x 1.50 thread size for direct-fit service applications
• Gray and gold sensor body finish
• Factory tested for consistent performance
• Built with controlled manufacturing from component to finished part

Product Details

Standard Ignition AX18 is an HVAC sensor designed to deliver accurate ambient temperature input for vehicles that rely on precise temperature data for system operation. The sensor’s thermistor response is specified to tight tolerances, helping support correct signal output to the vehicle control system. This part number is used across a wide range of Chrysler, Dodge, and Plymouth applications, including Chrysler Concorde, Chrysler LHS, Dodge Intrepid, and Plymouth Voyager. Standard Ignition AX18 is also a cross-reference for select OE-style replacement numbers used in the same applications.

This part cross-references DENSO Auto Parts 210-1012 and Four Seasons 75823 for the same application. Standard Ignition AX18 is also referenced in service listings for Dodge Viper, Chrysler Town & Country, and Dodge Caravan fitments.

Common Issues This Sensor May Address

• Incorrect ambient temperature readings on the dash or climate control display
• HVAC system input errors caused by a failing temperature sensor
• Intermittent sensor signal from worn connector terminals
• Temperature-related drivability or control concerns on supported applications
• Replacement needs for damaged plug-in sensor housings

Installation Notes and Tips

Verify connector style, thread size, and mounting location before installation. This AX18 sensor uses a plug-in connection with an oval female connector and male pin terminals, and it does not include a wiring harness, mounting bracket, or hardware. Fitment includes applications such as Fits 1992-2002 Dodge Viper, Fits 1993-1997 Chrysler Concorde, Fits 1994-1997 Chrysler LHS, Fits 1995-1996 Chrysler Intrepid, and Fits 1988-1994 Dodge Caravan with intake manifold absolute pressure sensor notes. Review the vehicle-specific notes for throttle body, cylinder head, or MAP sensor placement where listed.

Quality Assurance

Standard Ignition manufactures this sensor with in-process control from component selection through finished product assembly. Each unit is factory tested to help confirm proper operation before it reaches service use.