Description
Interior temperature sensor for CITROËN C5 II, C6, PEUGEOT 407, 607 and other Citroën or Peugeot models
Overview
High-quality interior temperature and humidity sensor designed for a range of Stellantis vehicles. The sensor supplies accurate cabin temperature (and, where fitted, relative humidity) data to the HVAC control unit to ensure correct climate regulation, improved comfort and efficient operation of the air-conditioning and heating system. Commonly searched under part numbers 9647527180 and 6445VC, this unit is frequently replaced by mechanics and DIY enthusiasts working on Citroën and Peugeot cars.
Function And Benefits
- Provides Cabin Temperature Measurement: Feeds real-time temperature data to the climate control module for precise temperature regulation.
- Monitors Relative Humidity (Where Applicable): Helps the HVAC system regulate dehumidification and avoid fogging of windows.
- Improves Comfort And Efficiency: Accurate sensing reduces unnecessary compressor duty cycles and prevents temperature oscillation.
- Direct Replacement For OEM Parts: Matches original fit and electrical characteristics for plug-and-play replacement in compatible models.
Compatibility And Fitment
Direct fit for a number of Citroën and Peugeot models from the same generation of climate systems. Typical applications include:
Always check the part number listed on the old sensor to confirm match with 9647527180 / 6445VC or alternative reference 9646573380.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C5 II, Citroën C6, Peugeot 407, Peugeot 607
- Product Codes: 9647527180, 6445VC
- Additional Numbers: 9646573380
How To Replace
Replacement is straightforward for a trained technician or an experienced DIYer. Typical procedure:
- Disconnect The Battery: Always isolate the battery before starting work to avoid electrical damage.
- Remove Trim Panels: Access the sensor by removing the relevant dashboard or center-console trim. The sensor is usually mounted near the HVAC controls or behind a vent grille.
- Unplug Electrical Connector: Release the locking tab and carefully disconnect the wiring plug.
- Unclip The Sensor: Remove the sensor from its holder or housing and replace with the new unit.
- Reassemble And Test: Reconnect the connector, re-fit trim, reconnect the battery and verify HVAC operation and temperature readout.
Installation Recommendations
- Follow Manufacturer Procedures: Use proper trim tools to avoid damage and follow the vehicle manufacturer’s instructions where available.
- Inspect Wiring And Connector: Check for corroded pins, broken wires or water ingress and repair any damaged harness components before installing the new sensor.
- Verify HVAC Operation After Fitment: Confirm that the climate control reads temperature correctly and that automatic modes behave normally.
- Use Anti-Static Precautions: Handle the sensor carefully and avoid contaminating the sensing element with grease or dust.
Most Common Failure Causes
- Connector Corrosion Or Poor Contact Causing Intermittent Readings
- Water Ingress Or Moisture Damage Affecting The Sensing Element
- Mechanical Damage From Impact Or Improper Removal
- Age-Related Drift Or Failure Of The Sensor Element Affecting Accuracy
- Contamination By Dust, Grease Or Cleaners That Impair Sensor Response
Symptoms Of A Faulty Sensor
- Incorrect Cabin Temperature Readings Displayed
- HVAC System Cycling Excessively Or Failing To Reach Target Temperature
- Persistent Window Fogging Or Humidity Control Issues
- Unstable Automatic Climate Control Behavior
Why Choose This Part
This sensor is specified for relevant Citroën and Peugeot models and carries the common OEM references trusted by workshops. It delivers reliable temperature input to the climate system, helping restore correct automatic HVAC function and passenger comfort.
Note
If the vehicle shows symptoms of climate-control faults, inspect connectors and wiring before replacing the sensor—repairing electrical faults often avoids unnecessary part replacement.
