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The Febi Bilstein Coolant Temperature Sensor 44439 is a precision-engineered component designed for automotive technicians and vehicle owners looking to maintain accurate engine temperature monitoring. It provides reliable data to the vehicle's engine management system, ensuring optimal combustion and cooling performance for heavy-duty or specialized applications requiring a 24V system. While it is built for durability, users should note that this specific model features a 103 °C switch point and requires a 22mm spanner, making it critical to verify compatibility against specific engine requirements before starting installation.
| Model Part Number | 44439 |
|---|---|
| Brand | febi bilstein |
No, the Febi Bilstein 44439 is specifically engineered for 24V electrical systems.
You will need a 22mm spanner to secure the sensor.
Yes, it is standard to install this with the appropriate sealing ring to ensure the M14 thread is liquid-tight.
The switch point is the specific temperature at which the sensor sends a signal to the engine management system to activate the cooling cycle.
Compare the MPN 44439 against your vehicle's original part number or consult a technical parts catalog for your specific engine model.
Check the wiring harness for frayed wires or loose connections at the 2-pin port.
Verify that the coolant temperature exceeds the 103 °C switch point; if it does and the fan remains off, check the fuse or the fan relay.
Ensure the sensor is tightened correctly and check if the sealing washer is damaged or missing.
Installation should only be performed when the engine is completely cool to prevent coolant spray or burns. Use a 22mm spanner to tighten the sensor to the manufacturer-specified torque settings to avoid stripping the M14 x 1.5 thread. Always inspect the electrical connector for corrosion or debris before plugging it into the 2-port housing. If you notice signs of coolant leaking from the sensor base, replace the copper sealing ring immediately to ensure a pressure-tight seal. Compatibility must be verified by matching the MPN 44439 with your vehicle's service manual or parts catalog.
