Vemo V40-72-0420 Sender Unit, coolant temperature
Vemo (4046001393167 / V40-72-0420) | Vemo V40-72-0420
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Vemo V40-72-0420 Sender Unit – Coolant Temperature Sensor
The Vemo V40-72-0420 Sender Unit is a precision-engineered coolant temperature sensor designed for automotive applications. It delivers reliable, real-time temperature data to the vehicle’s engine control unit (ECU), enabling optimal combustion, fuel efficiency, and engine protection.
Key Features
- High Accuracy: Measures coolant temperature within ±1 °C across a wide operating range.
- Wide Temperature Range: Operates from –40 °C to +120 °C, suitable for both cold climates and high-performance engines.
- Robust Construction: Encased in a durable plastic housing that resists vibration, corrosion, and thermal shock.
- Standardized Connector: Equipped with a 3‑pin or 4‑pin connector (depending on variant) compatible with most OEM ECU wiring harnesses.
- Rapid Response Time: Provides instantaneous temperature readings for precise engine management.
Technical Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature Range | –40 °C to +120 °C |
| Accuracy | ±1 °C |
| Connector Type | 3‑pin or 4‑pin (depending on variant) |
| Resistance at 0 °C | ~100 Ω |
| Operating Current | ≤50 mA |
| Dimensions (L×W×H) | ≈30 mm × 15 mm × 10 mm |
| Weight | ~20 g |
Compatibility and Applications
The Vemo V40-72-0420 is engineered to fit a broad spectrum of vehicles, including:
- Renault models such as the Twingo 2, Kangoo I, and Clio 3.
- Mazda, Mitsubishi, Nissan, Opel, Volvo, and Suzuki platforms.
- Commercial and light-duty trucks from General Motors and Dacia.
- Hybrid and electric vehicles that require precise coolant temperature monitoring for thermal management.
Its universal design allows seamless integration into both OEM and aftermarket ECU systems, making it a preferred choice for automotive technicians and DIY enthusiasts alike.
Installation Guide
- Locate the Existing Sensor: Typically positioned near the engine block or coolant reservoir. Refer to the vehicle’s service manual for exact placement.
- Disconnect Power: Ensure the battery is disconnected to avoid electrical hazards.
- Remove Old Sensor: Unscrew or unclip the existing sensor, taking care not to damage the wiring harness.
- Connect Vemo V40-72-0420: Align the connector pins with the harness and secure it. Verify that the polarity matches the vehicle’s specifications.
- Reinstall in Engine Bay: Place the sensor back into its mounting location, tightening any screws or clamps to the manufacturer’s torque settings.
- Reconnect Power and Test: Restore battery connection. Use a diagnostic scan tool to confirm that the ECU reads temperature values within expected ranges.
Benefits of Choosing Vemo V40-72-0420
- Enhanced Engine Protection: Accurate coolant readings help prevent overheating and potential engine damage.
- Improved Fuel Efficiency: Precise temperature data allows the ECU to optimize fuel injection timing, reducing consumption.
- Long-Term Reliability: Durable materials ensure consistent performance over many years of service.
- Easy Replacement: Standard connector design simplifies swapping with OEM parts or other high-quality aftermarket sensors.
Maintenance Tips
While the Vemo V40-72-0420 is designed for minimal upkeep, periodic checks can extend its lifespan:
- Inspect the connector pins for corrosion or damage every 12–18 months.
- Verify that the sensor housing remains intact and free from cracks.
- Ensure coolant levels are maintained to avoid sensor exposure to extreme temperatures.
Conclusion
The Vemo V40-72-0420 Sender Unit – Coolant Temperature Sensor stands out as a reliable, high-performance component for modern automotive systems. Its precise temperature measurement, robust construction, and broad compatibility make it an essential upgrade or replacement for any vehicle requiring accurate coolant monitoring.
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 23.63 EUR  20.37 EUR |
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| Tags | Vemo V40-72-0420 |
| Identifiers | |
| Brand |  Vemo is a brand that specializes in making watches. They make a wide variety of watches, from sporty to dressy, and everything in between. Their watches are known for their high quality and stylish designs. |
| MPN | Vemo V40-72-0420 |
| ID | 20727826 |
| Dimensions / Weight | |
| Key Features | |
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