Standard Ignition AX519 Humidity Sensor

Humidity Sensor for Cabin Climate Control

Standard Ignition AX519 is a direct-fit humidity sensor for vehicles equipped with automatic HVAC climate control. It monitors cabin humidity and sends the signal needed for the system to adjust airflow and comfort settings. This replacement is tested to OE specifications for dependable operation in Chrysler, Dodge, Jeep, Ram, and Fiat applications.

Key Features

• Direct-fit replacement for straightforward installation
• Detects cabin humidity for automatic HVAC adjustment
• Female connector with 1 rectangular connector interface
• 3 male blade terminals for OE-style electrical connection
• Tested to OE specifications for performance and service life
• Fits 2011-2023 Dodge Charger, 2015-2023 Dodge Challenger, and 2012-2023 Chrysler 300 applications

Detailed Description

The Standard Ignition AX519 humidity sensor is built for vehicles that rely on cabin humidity input to manage HVAC operation. By providing accurate humidity detection inside the passenger compartment, it helps the climate control system respond appropriately to changing conditions. This part number AX519 is a practical OE-style replacement for Chrysler 300, Dodge Charger, Dodge Challenger, Jeep Cherokee, Jeep Grand Cherokee, Ram 1500, and other listed applications.

This part cross-references 55111389AF and MSSA24 for the same application.

What It Helps Address

• Incorrect cabin humidity readings
• HVAC systems that do not adjust properly to interior moisture levels
• Reduced comfort from inconsistent automatic climate control behavior
• Faults related to a failed interior humidity sensor
• Replacement needs after sensor wear or electrical connection issues

Installation Notes and Tips

Verify connector shape, terminal style, and vehicle application before installation. The AX519 uses a female connector, one rectangular connector, and three male blade terminals, so matching the OE electrical interface is important. Confirm the vehicle’s HVAC system uses a cabin humidity sensor and follow the service procedure for the specific Chrysler, Dodge, Jeep, Ram, or Fiat model.

Quality Assurance

Standard Ignition tests this humidity sensor to OE specifications to support proper fit, function, and long service life. That makes AX519 a dependable replacement choice for drivers servicing automatic climate control systems in Dodge Durango, Chrysler Voyager, and related applications.