Description
Cabin Air Temperature Sensor for Citroën and Peugeot vehicles
Overview
This interior temperature sensor (part number 6436G4) monitors the cabin/airflow temperature and provides the climate control unit with the data needed to regulate heating, ventilation and air conditioning. Designed for Citroën and Peugeot cars, it ensures accurate temperature feedback for automatic climate systems, improving comfort and reducing unnecessary compressor or heater cycling.
Why This Part Matters
A functioning cabin temperature sensor is critical for reliable operation of automatic climate control. If the sensor reads incorrectly, the system may overheat or overcool the cabin, run the blower at inappropriate speeds or display incorrect temperature information. Replacing a faulty sensor restores proper temperature regulation and can prevent unnecessary stress on HVAC components.
Compatibility
Commonly fitted to a range of Stellantis Citroën and Peugeot models. Frequently searched under part numbers 6436G4 and 6436.G4. Typical applications include, but are not strictly limited to: Citroën C4, Peugeot 307, Peugeot 3008 (first generation), Peugeot 5008 (first generation). Always check fitment against the vehicle’s parts list or service documentation when possible.
Installation & Replacement
On many Citroën and Peugeot cars the cabin air temperature sensor is mounted in or near the HVAC unit—often behind the dashboard, behind the centre fascia, or close to the evaporator/air distribution chamber. Replacement is usually straightforward for a trained mechanic or competent DIYer: remove the relevant trim or glovebox to access the sensor, unplug the electrical connector, release the retaining clip or unscrew the sensor, and install the new unit in the reverse order. Ensure connectors are fully seated and any seals or grommets are correctly positioned to avoid air leaks.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C4; Peugeot 307; Peugeot 3008 I; Peugeot 5008 I
- Product Codes: 6436G4
- Additional Numbers: 6436.G4
Installation Recommendations
- Work in a dry, well-lit area and follow general workshop safety rules.
- Turn the ignition off before disconnecting the sensor connector; for extra caution, isolate the battery if you will be removing trim that could affect other electrical systems.
- Handle the sensor and its connector carefully to avoid damage to the sensing element and wiring; replace any damaged grommets or seals to prevent moisture ingress.
- After replacement, verify operation on the vehicle: check that the climate control responds correctly and that temperature readings change when the cabin warms or cools.
Most Common Failure Causes
- Moisture ingress or condensation causing corrosion of the sensor element or connector contacts.
- Contamination from dust and debris inside the HVAC housing affecting the sensing element.
- Wiring damage or connector corrosion leading to intermittent or lost signal.
- Age-related electronic drift of the NTC/thermistor element, causing incorrect temperature readings over time.
Notes for Professionals
This sensor is often searched by its part number (6436G4). When replacing, check surrounding HVAC components (filters, seals, blower) for issues that could have contributed to the sensor failure. Proper sealing and a clean cabin air filter help prolong sensor life.
