Standard Ignition TX49 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for Chrysler and Dodge

Standard Ignition TX49 is an ambient air temperature sensor built for accurate temperature measurement and reliable HVAC system input. It uses a tight-tolerance thermistor response to help maintain proper sensor operation, with a black housing, oval plug-in connector, and 2-pin male terminals for a direct-fit style replacement.

Key Features

• Ambient air temperature sensor for HVAC temperature input
• Tight tolerance thermistor response values for measurement accuracy
• Black sensor body with oval female connector
• Push-on attachment method with plug-in connection
• 2-pin male terminal design
• No mounting bracket and no wiring harness included
• Standard Ignition TX49 part number for service replacement

Detailed Description

Standard Ignition TX49 is engineered for vehicles that rely on ambient air temperature data for HVAC operation and related climate-control functions. The sensor design focuses on consistent thermistor response and factory-tested performance to support dependable readings in everyday service use. This part cross-references Four Seasons 75982 for the same application. It is a practical replacement choice for Chrysler, Dodge, Jeep, and Plymouth applications, including Dodge Ram 1500, Jeep Cherokee, and Chrysler Sebring models.

Compatible vehicle coverage includes long-tail search applications such as Fits 1994-2002 Dodge Ram 1500, N/A; Fits 1987-2001 Jeep Cherokee, N/A; and Fits 1996-2000 Chrysler Sebring, N/A. The TX49 also serves many other Chrysler and Dodge platforms from 1987 through 2002, making it a useful service part for HVAC sensor replacement across multiple model lines.

Common Problems This Sensor Can Address

• Incorrect ambient temperature readings on the HVAC display
• Climate control behavior affected by a failed temperature input signal
• Intermittent sensor communication caused by worn terminals or connector issues
• HVAC performance concerns tied to inaccurate outside-air temperature data
• Replacement needs after sensor damage, corrosion, or age-related failure

Installation Notes and Tips

Verify connector style, terminal layout, and vehicle fitment before installation. TX49 uses a push-on attachment method with a single oval female connector and 2 male pin terminals, so matching the original sensor connection is important. Confirm the application against the vehicle’s year, make, model, and any listed notes, such as Grand Cherokee models with an overhead console.

For fitment reference, this part fits 2001-2002 Chrysler Prowler, N/A; 1994-2002 Dodge Ram 1500, N/A; 1987-2001 Jeep Cherokee, N/A; and 1996-2000 Chrysler Sebring, N/A.

Quality Assurance

Standard Ignition states that it controls manufacturing from component selection through finished product assembly. The sensor is built with tight tolerance thermistor response values and is factory tested to support trouble-free performance. Part number TX49 is backed by Standard Ignition’s broad sensor coverage for service professionals.