Standard Ignition AX393 Cabin Air Temperature Sensor

Cabin Air Temperature Sensor for Mercedes-Benz HVAC

Standard Ignition AX393 is a cabin air temperature sensor for Mercedes-Benz climate control systems. It is built with a rectangular plug-in connector, 4 terminals, and a bolt-on mounting style for a direct replacement on listed applications.

Key Features

• Cabin air temperature sensor for HVAC temperature monitoring
• Fits 1990-2002 Mercedes-Benz 300SL, 500SL, 600SL, SL320, SL500, and SL600 applications
• Standard Ignition AX393 replacement part number
• Male connector with female terminals, 1 connector, rectangular plug-in design
• Black finish with mounting bracket(s) included and wiring harness included
• 4-terminal sensor construction for vehicle climate control service

Detailed Description

Standard Ignition AX393 is a cabin air temperature sensor used in Mercedes-Benz HVAC systems to provide temperature input for climate control operation. This part is listed for 1990-1993 Mercedes-Benz 300SL, 500SL, and 600SL, plus 1994-2002 Mercedes-Benz SL320, SL500, and SL600 models. If you are replacing a Mercedes-Benz SL500 cabin air temperature sensor or sourcing an AX393 replacement for an SL600 climate control repair, this part matches the listed fitment and connector style.

This part cross-references 1298300408 and TS57520 for the same application.

Common Problems It Can Address

• Incorrect cabin temperature readings in the HVAC system
• Climate control that cycles air temperature improperly
• Loss of accurate interior temperature feedback
• Fault codes related to cabin temperature sensing
• Uneven or unstable automatic climate control performance

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This AX393 sensor uses a bolt-on attachment method with a plug-in rectangular connector, so the existing harness and bracket layout should be checked against the vehicle before replacement. Confirm the application against the vehicle’s HVAC system and compare the original sensor to the new part for connector and bracket match.

Quality Assurance

Standard Ignition supplies replacement electrical and HVAC components for service applications, and AX393 is built to match the listed Mercedes-Benz fitment and connection details.