OE Quality
60-Day Returns

Standard Ignition TS-439 Automatic Transmission Fluid Temperature Sensor
Overview of Standard Ignition TS-439 Transmission Sensor
The Standard Ignition TS-439 is an automatic transmission fluid temperature sensor designed specifically for Toyota Previa models. This sensor provides accurate temperature readings to help maintain optimal transmission performance and prevent overheating issues.
- Plug-in attachment method for straightforward installation
- Straight bend angle for precise fitment
- Durable plastic and brass construction with brass contact terminals
- Single female square connector with one blade terminal
- Includes one o-ring for secure sealing
- Measures 1.41 inches in length
- Operates at 12 volts
Detailed Product Description
The Standard Ignition TS-439 automatic transmission fluid temperature sensor is engineered to provide reliable temperature monitoring for the transmission system in Toyota Previa vehicles. Featuring a plug-in attachment method and a straight bend angle, this sensor ensures a proper fit and easy replacement. The sensor’s body is constructed from durable plastic and brass materials, with brass contact terminals that offer consistent electrical conductivity. The female connector is square-shaped and designed to accept a single blade terminal, facilitating a secure and stable connection. Included with the sensor is one o-ring to help maintain a tight seal and prevent fluid leaks. Measuring 1.41 inches in length, the sensor is compact yet robust enough to withstand typical operating conditions. It operates on a 12-volt system, matching the electrical requirements of the Toyota Previa’s transmission system.
Common Applications and Issues Addressed
- Monitors transmission fluid temperature to prevent overheating
- Helps maintain proper transmission shifting performance
- Prevents transmission damage caused by excessive heat
- Supports accurate transmission control module readings
- Resolves transmission temperature sensor fault codes
Installation Notes and Tips
- Ensure the vehicle is cool and transmission fluid is at operating temperature before installation
- Use the included o-ring to prevent leaks and ensure a proper seal
- Verify the connector is fully seated and locked to avoid electrical issues
- Check for any transmission fluid contamination around the sensor area before installation
- Consult the Toyota Previa service manual for torque specifications and sensor location
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The TS-439 sensor undergoes rigorous quality control testing to maintain consistent functionality. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in material and workmanship. Refer to the product packaging or manufacturer documentation for exact warranty terms.
| Brand | Standard Ignition |
|---|---|
| Part Number | TS-439 |
| Connector Gender | Female |
| Connector Type | Plug In |
| Contents | 1 O-ring |
| Terminal Gender | Male |
| Terminal Type | Blade |
This part fits 2 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1992 | Toyota | Previa | N/A | |
| 1991 | Toyota | Previa | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.