Description
Interior Air Temperature Sensor for Citroën and Peugeot vehicles.
Product Overview
High-quality replacement interior air temperature sensor, part number 6445YY, designed for Citroën and Peugeot models. This sensor provides reliable cabin temperature readings for the HVAC control unit, helping to maintain stable climate regulation, improve passenger comfort, and ensure efficient air conditioning operation. Frequently searched by part number (6445YY), it is a common spare for workshops and DIY mechanics servicing climate systems on Stellantis group vehicles.
Function And Benefits
The interior air temperature sensor measures the temperature of the cabin air and sends this information to the climate control module. Accurate input from the sensor allows the HVAC system to modulate blower speed, blend doors and compressor activity to reach and maintain the target cabin temperature. Replacing a faulty sensor restores precise temperature control, reduces unnecessary compressor cycling and can improve fuel efficiency when automatic climate functions are used.
Fitment And Compatibility
Compatible With (examples): Citroën C4, Citroën C5 X7, Peugeot 307, Peugeot 407. Always check the part number (6445YY) when searching for compatibility; many users and repair databases reference parts by code.
Installation Recommendations
- Disconnect the battery before starting work to avoid electrical shorts and protect vehicle electronics.
- Access the sensor via the dashboard vent area or centre console trim depending on model—consult vehicle repair manual for exact location.
- Carefully remove trim panels, unplug the electrical connector, release any clips or screws securing the sensor and remove the old unit.
- Fit the new sensor ensuring correct orientation and secure connector engagement. Reassemble trim and reconnect the battery.
- After installation, verify HVAC operation: check temperature readings, automatic climate regulation and compressor engagement. Most interior temperature sensors are plug-and-play and do not require coding.
Common Failure Reasons
Interior temperature sensors are generally durable but can fail due to moisture ingress, contamination (dust or debris), corrosion of connector pins, thermal cycling and physical damage during dashboard repairs or accidents. Symptoms of a failing sensor include incorrect cabin temperature readings, erratic climate control behavior, poor automatic temperature regulation and unnecessary AC cycling.
How Often They Fail
These sensors often last for many years, but failure likelihood increases with vehicle age, exposure to humid environments or after water leaks into the dash area. In workshop practice, failures are more commonly reported on older vehicles or after interior water ingress events.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4; Citroën C5 X7; Peugeot 307; Peugeot 407
- Product Codes: 6445YY
- Other Numbers: None Provided
Notes For Mechanics And DIYers
Because this part is commonly searched by its code, include 6445YY in your inventory and search queries to speed up sourcing. Handle connectors gently to avoid pin damage and ensure proper seating to prevent intermittent faults. If climate control faults persist after sensor replacement, inspect wiring harness, control module inputs and related HVAC actuators.
