Description
Interior Temperature and Humidity Sensor BITRON for Citroën Xsara and Xsara Picasso
Product Overview
This interior temperature and humidity sensor from Bitron supplies the vehicle’s HVAC system with accurate cabin climate data to control automatic heating, ventilation and air conditioning. Fitted on Citroën Xsara and Xsara Picasso models (Stellantis group references shown below), the sensor helps regulate cabin temperature, manage compressor cycling, control recirculation and support anti-fog/defog functions for improved comfort and safety.
Key Benefits
- Direct Replacement For OEM Part Numbers: Simple swap-in replacement for quicker workshop turnaround.
- Stable Climate Control: Restores reliable temperature and humidity readings for correct automatic HVAC operation.
- Designed For Professional And DIY Use: Clear OE references make ordering and identification fast for mechanics and home mechanics.
Technical Information
- Manufacturer: Bitron
- Model: Citroën Xsara; Citroën Xsara Picasso
- Product Codes: 9628358080; 6445JA; 6445AR
- Additional Numbers: Stellantis / Citroën / Peugeot References 9628358080, 6445JA, 6445AR
Function And Symptoms Of Failure
The sensor measures cabin air temperature and relative humidity and sends these signals to the climate control module. When the sensor fails or degrades, common symptoms include incorrect cabin temperature readings, poor automatic climate regulation (overcooling or overheating), frequent compressor cycling, persistent fogging inside the windscreen, or fault codes related to the HVAC sensor. In some cases the climate system may revert to manual mode or show reduced performance.
Why The Part Fails Most Often
- Moisture Ingress: Water or condensation can damage the sensing element or corrode contacts.
- Contamination: Dust, debris or degraded cabin air filters can coat the sensor and impair readings.
- Connector Corrosion Or Wiring Damage: Electrical faults from corroded pins or chafed wiring lead to intermittent or lost signal.
- Aging And Thermal Stress: Long-term exposure to heat and humidity can shift sensor calibration or cause failure.
Replacement And Installation Recommendations
Typical replacement is straightforward but requires careful access to the sensor location. Follow these general steps:
- Disconnect The Battery Before Starting To Avoid Short Circuits And Protect Electronic Systems.
- Remove The Relevant Dash Trim Or Center Console Panels To Access The Sensor (Usually Located Near The Center Vent Area Or Behind The HVAC Control Panel).
- Unplug The Electrical Connector And Remove Any Retaining Clips Or Screws Holding The Sensor.
- Fit The New Sensor, Ensure A Secure Mechanical Fixing And Clean Connector Contacts Before Reconnecting.
- Reassemble Panels, Reconnect The Battery And Test HVAC Functionality Under Different Modes (Auto/Manual) To Confirm Correct Operation.
Most cabin temperature/humidity sensors are plug-and-play and do not require coding. However, after replacement check the HVAC system for correct automatic behavior and clear any stored fault codes if present. If uncertain about access or diagnostics, use appropriate workshop tools for safe, efficient replacement.
Purchase Notes
Order by OE reference to ensure fast identification: 9628358080 / 6445JA / 6445AR. Suitable for Citroën Xsara and Xsara Picasso HVAC systems; commonly referenced in Stellantis parts catalogs. Ideal for professional garages and competent DIYers who need a reliable cabin climate sensor replacement.
