Standard Ignition AX518 Cabin Air Temperature Sensor

Cabin Air Temperature Sensor for OE Fit

Standard Ignition AX518 is a direct-fit cabin air temperature sensor for vehicles with dash-mounted HVAC sensing. It is built with a black rectangular female connector, male pins, and a 6-terminal layout to match the original electrical interface on the application.

Compatible with 2014-2019 Ford Flex, dash; 2014-2019 Ford Taurus, dash; 2014-2019 Lincoln MKT, dash; 2015-2017 Ford Expedition, dash; and 2015-2017 Lincoln Navigator, dash. The AX518 is a practical replacement when the original sensor is no longer reading cabin temperature accurately.

Key Features

• Direct-fit OE replacement for the cabin air temperature sensor
• Black housing with one rectangular female connector
• 6-pin male terminal design for factory-style connection
• No mounting bracket included
• No wiring harness included
• Built with materials intended to handle demanding under-dash conditions
• Tested for consistent operation and dependable HVAC input

Detailed Description

Standard Ignition AX518 is a replacement cabin air temperature sensor engineered to restore the HVAC system’s temperature feedback signal. It is made to match original fit, form, and function, which helps simplify installation on Ford Flex, Ford Taurus, Lincoln MKT, Ford Expedition, and Lincoln Navigator models with dash-mounted sensor locations. The part number AX518 is also referenced for OE-style service applications where the factory sensor has failed or drifted out of specification.

This part cross-references YH1939 and EG1Z19E616A for the same application.

What It Helps Solve

• Incorrect cabin temperature readings sent to the HVAC control system
• Unstable automatic climate control operation
• Delayed or inconsistent heating and cooling response
• Fault codes related to cabin temperature sensing
• Replacement needs after sensor connector or internal component wear

Installation Notes and Tips

Verify the connector style, terminal count, and dash location before installation. AX518 uses a female connector with male pins and does not include a wiring harness or mounting bracket, so reuse of the original vehicle-side hardware and connector routing may be required. Confirm the vehicle is one of the listed Ford or Lincoln applications before ordering.

Quality Assurance

Standard Ignition states that this sensor is manufactured as a direct-fit OE replacement and is tested for reliability and performance. The part is produced under controlled manufacturing processes with materials selected for durability in harsh operating conditions.