Standard Ignition AX45 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Nissan and INFINITI

Standard Ignition AX45 is an ambient air temperature sensor for select Nissan and INFINITI applications. It uses a 2-terminal design with a female connector, male blade terminals, and a plug-in round/square connector style for direct replacement service.

• Part number: AX45
• Ambient air temperature sensor for HVAC-related temperature input
• 2 terminals with male blade terminals
• Female connector, plug-in connection
• Black and brown finish
• No mounting bracket and no wiring harness included
• Cross-reference: Dayco AX45

Fitment Details

• Fits 1994-1997 INFINITI J30, N/A
• Fits 1993-1997 Nissan Altima, N/A
• Fits 1993-1995 Nissan Pathfinder, N/A
• Fits 1993 INFINITI J30, N/A, from 4/93

Product Description

Standard Ignition AX45 is built as an ambient air temperature sensor for vehicles that rely on outside-air temperature input for HVAC and related climate-control functions. The connector layout, terminal style, and plug-in attachment method support a straightforward replacement on the listed Nissan Altima, Nissan Pathfinder, and INFINITI J30 applications. If you are replacing a failed ambient air temperature sensor on a Nissan Altima, Nissan Pathfinder, or INFINITI J30, AX45 provides the correct electrical interface for the specified fitments.

Common Issues This Part May Address

• Incorrect outside temperature display
• HVAC system receiving inaccurate ambient air readings
• Climate control behavior affected by a faulty temperature sensor
• Intermittent sensor signal from worn terminals or connector wear
• Replacement need after corrosion or physical damage at the sensor

Installation Notes and Tips

Verify the connector shape, terminal count, and mounting location against the original sensor before installation. This part uses a plug-in connection with no wiring harness included and no mounting bracket included, so reuse the existing vehicle mounting provisions where applicable. Confirm vehicle year and model carefully, especially for 1993 INFINITI J30 vehicles built from 4/93.

Quality Assurance

Standard Ignition replacement sensors are cataloged for direct-fit service on the listed applications and are identified by part number AX45. This part also cross-references 172286 for the same application.