Coolant Temperature Sensor - Ci Ignition - XTS39
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Product Information
Full details
This Ci Ignition XTS39 Coolant Temperature Sensor is designed for vehicle owners and mechanics needing a reliable replacement temperature switch for coolant warning lamps. Its key benefit is ensuring accurate coolant temperature readings to prevent engine overheating. A potential caveat is the specific thread size and connector type, requiring verification for your vehicle model. This new replacement part features an M10x1.0 thread size, a 2-pin connector, and a switch point of 37°C, offering a direct fit for compatible OEM applications.
All features
| Model Part Number | XTS39 |
|---|---|
| Brand | Ci Ignition |
Extended Product Information
FAQs
What is the main purpose of the Ci Ignition XTS39 Coolant Temperature Sensor?
Its primary function is to act as a temperature switch that activates the coolant warning lamp on your vehicle's dashboard when the coolant reaches a specific temperature (37°C), alerting you to potential overheating.
What does the '37°C switch point' mean?
This means the internal switch within the sensor closes and completes the circuit to illuminate the warning light when the coolant temperature rises to approximately 37 degrees Celsius.
Is this sensor compatible with all vehicles?
No, this sensor is designed for specific vehicle models, particularly those using the OEM reference VAG035919369B and certain Audi 100 variants. Always verify the thread size (M10x1.0) and connector type (2-pin) against your vehicle's existing sensor.
Can I install this myself?
Yes, if you have basic automotive mechanical skills and the necessary tools. However, it involves working with the cooling system, so safety precautions like ensuring the engine is cool are important. If you are unsure, it is recommended to have a qualified mechanic perform the installation.
Does this sensor send temperature data to the engine control unit (ECU)?
No, the XTS39 is a simple temperature switch designed solely to trigger a warning lamp. It does not provide continuous temperature readings to the ECU for engine management.
What other part numbers does the XTS39 cross-reference with?
It cross-references with several part numbers, including ERA330960, FAE35420, and FEBI BILSTEIN05282, among others.
How do I know if my current sensor needs replacement?
Symptoms can include the coolant warning light not illuminating when it should, or the light staying on constantly even when the engine is not overheating. You might also notice coolant leaks around the sensor housing.
Troubleshooting
Coolant warning light stays on after installation.
Ensure the engine has reached operating temperature. If the light remains on at normal temperatures, double-check the electrical connection and verify the sensor's switch point (37°C) is appropriate for your system. The coolant may not be circulating properly, or there may be another fault.
Coolant warning light does not come on even when engine is overheating.
Check the electrical connection to the sensor. Inspect the wiring harness for damage. The sensor itself may be faulty, or the warning lamp circuit (bulb or LED) might be burned out.
Sensor leaks coolant after installation.
The sensor may not be tightened sufficiently, or the sealing surface may be contaminated. Remove the sensor, clean the threads on both the sensor and the port, and re-install with a suitable thread sealant if recommended for your application. Ensure the port threads are not damaged.
Incorrect temperature reading causing false warnings or no warnings.
Verify the sensor's switch point (37°C) is correct for your vehicle's requirements. If the sensor is faulty, it may not be activating at the correct temperature. Ensure the coolant system is functioning correctly and reaching the expected temperatures.
Pros and Cons
Pros
- Ensures accurate activation of the coolant warning light.
- Designed as a direct replacement for specific OEM part numbers.
- Quality new part minimizes the risk of immediate failure.
- Standard thread size and connector for ease of installation.
- Helps prevent engine damage by alerting to overheating conditions.
Cons
- Specific thread size (M10x1.0) may not be universal.
- Only activates at a single, fixed temperature (37°C).
- Requires verification of compatibility with vehicle's electrical system.
- Limited to its function as a warning lamp switch; does not provide temperature readings to ECU.
- Replacement may require draining and refilling coolant.
Setup, Compatibility & Care
Compatibility Check: Before installation, confirm that your vehicle's original part number is VAG035919369B or a compatible reference. Verify that the M10x1.0 thread size and the 2-pin connector match your vehicle's existing setup.
Installation:
- Ensure the engine is cool before beginning.
- Safely drain a small amount of coolant to prevent spillage.
- Carefully unscrew the old sensor using an appropriate wrench.
- Clean the sensor port threads.
- Thread the new Ci Ignition XTS39 sensor into the port, tightening it securely but without overtightening.
- Reconnect the 2-pin electrical connector.
- Top up the coolant to the appropriate level.
- Start the engine and check for leaks. Monitor the coolant temperature and warning light function.
Care: This is a sealed electrical component. No regular maintenance is typically required. Ensure the electrical connector remains clean and free from corrosion. In the event of a coolant leak from the sensor port, the sensor may need to be removed and re-sealed or replaced.