Standard Ignition TX27 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Jeep Applications

The Standard Ignition TX27 engine coolant temperature sensor is built for accurate coolant temperature measurement and reliable engine management feedback. It is a direct-fit style sensor for select Jeep Wrangler, J10, CJ7, Grand Wagoneer, Scrambler, and CJ5 applications, with a bolt-on attachment and M12-1.40 thread size.

Standard Ignition TX27 is engineered with a tight-tolerance thermistor response to help maintain consistent signal output. It is factory tested before leaving the plant, and the connector design uses a round, 2-terminal plug-in configuration for straightforward service replacement.

Key Features

• Engine coolant temperature sensor for select Jeep vehicles
• Bolt-on attachment method
• Female connector with 2 terminals
• Round plug-in connector design
• Male pin terminals for secure electrical contact
• M12-1.40 thread size
• Factory tested for signal and operation verification
• Standard Ignition TX27 part number for catalog and service lookup

Detailed Description

Standard Ignition TX27 is an engine coolant temperature sensor designed to provide accurate temperature input to the vehicle’s engine control system. The sensor uses a thermistor-based design with tight tolerance response values, helping deliver consistent readings for proper engine operation. Its bolt-on mounting style, female round connector, and M12-1.40 thread make it a practical replacement for service work on Jeep cooling and engine management systems. This part cross-references Four Seasons 37889 for the same application.

Compatible With 1987-1990 Jeep Wrangler, 1983-1987 Jeep J10, 1983-1986 Jeep CJ7, 1984-1986 Jeep Grand Wagoneer, 1984-1985 Jeep Scrambler, and 1983 Jeep CJ5. If you are replacing a Jeep Wrangler coolant temperature sensor or sourcing a TX27 replacement for a Jeep CJ7 temperature sensor application, verify connector style and thread size before installation.

Common Issues This Sensor May Address

• Incorrect coolant temperature readings at the engine control system
• Hard starting or poor cold-engine fuel control related to temperature input
• Temperature gauge or sensor signal irregularities
• Check engine light concerns tied to coolant temperature data
• Service replacement for a worn or inaccurate Jeep coolant temperature sensor

Installation Notes and Tips

Confirm the connector shape, terminal count, and thread size match the original sensor before installation. Inspect the mating connector and wiring for corrosion, damaged pins, or heat-related wear, and verify the sealing surface is clean before threading the sensor into place. For Jeep Wrangler, CJ7, and Grand Wagoneer applications, compare the original part number and sensor style to ensure the correct TX27 replacement.

Quality Assurance

Standard Ignition states that it controls the manufacturing process from component selection through finished product assembly. Each coolant temperature sensor is factory tested to help verify operation before shipment, and the brand emphasizes broad sensor coverage for service professionals.