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Standard Ignition TX21 Engine Coolant Temperature Sensor
| Brand | Standard Ignition TX21 |
|---|---|
| Attachment Method | Bolt On |
| Connector Gender | Female |
| Connector Shape | Round |
| Connector Type | Plug In |
| Terminal Gender | Male |
| Terminal Type | Pin |
| Thread Size | M16-1.50 |
| Fits | Acura and Honda · 4 vehicles |
Bolt-on installation. Plug-in coolant temperature sensor for straightforward replacement.
Round connector. Female connector with two male pin terminals.
M16-1.50 thread. Sized for a secure threaded fit.
Cross-references Standard Ignition TX21, 37870PE2003 and 12351992 for the same application. See all 6.
Engine Coolant Temperature Sensor for Honda and Acura
Standard Ignition TX21 is an engine coolant temperature sensor built for direct replacement service on select Honda and Acura applications. It uses a bolt-on attachment method with a round, plug-in female connector and a 2-pin male terminal layout for straightforward electrical connection.
Key Features
- Engine coolant temperature sensor for cooling system temperature signal input
- Bolt-on mounting style for secure installation
- Round, plug-in female connector with 1 connector interface
- 2-pin male terminal design
- M16-1.50 thread size
- Standard Ignition TX21 replacement part
Product Details
This coolant temperature sensor monitors engine coolant temperature and sends that information to the vehicle’s control system. Accurate temperature input is important for fuel delivery, idle quality, and cooling fan operation. Standard Ignition TX21 is listed for 1986-1987 Acura Integra and 1986-1987 Honda Civic applications, making it a direct-fit option for owners searching for an engine coolant temperature sensor for 1986-1987 Honda Civic or 1986-1987 Acura Integra service.
This part cross-references SU408 and TS5547 for the same application.
Common Issues It May Address
- Incorrect coolant temperature readings
- Hard starting when the engine is cold
- Rough idle caused by inaccurate temperature input
- Cooling fan control concerns tied to sensor signal errors
- Check engine light conditions related to coolant temperature data
Installation Notes and Tips
Verify the M16-1.50 thread size, connector shape, and terminal layout before installation. Inspect the connector for corrosion or damaged pins, and confirm the sealing surface is clean so the sensor seats properly. Always compare the removed part to the new Standard Ignition TX21 before final installation.
Quality Assurance
Standard Ignition is a recognized name in replacement electrical and engine management components. TX21 is built to match the listed application requirements for fitment-focused service on Honda Civic and Acura Integra models from 1986-1987.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1987 | Acura | Integra | N/A | — |
| 1987 | Honda | Civic | N/A | — |
| 1986 | Acura | Integra | N/A | — |
| 1986 | Honda | Civic | N/A | — |
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