Description
BEHR Heater Servo Motor for Citroën C5 X7 and Peugeot 407
This BEHR heater servo motor is a direct-fit HVAC actuator for Citroën C5 X7 and Peugeot 407 models. It operates the internal heater/air distribution flaps to regulate cabin temperature and airflow. Ideal for professional workshops and DIY mechanics, this servo motor is often sought by its product codes and ensures precise movement of HVAC doors for consistent climate control performance.
Technical Information
- Manufacturer: BEHR
- Model: Citroën C5 X7; Peugeot 407
- Product Codes: EAD516; P1975001
- Other Numbers: 42 647949; 647949
Function And Benefits
The servo motor controls the position of heater and distribution flaps inside the heater box, allowing the climate control system to mix hot and cold air or direct airflow to the windscreen, face vents, or footwell. A correctly working actuator provides:
- Accurate cabin temperature regulation
- Smooth, quiet flap movement
- Reliable responsiveness to climate control commands
- Direct replacement for OE-style actuators on the specified models
Installation Recommendations
Replacement is straightforward for an experienced mechanic and achievable by a competent DIYer. General steps:
- Disconnect the vehicle battery before starting to avoid electrical shorts.
- Access the heater box area—this often requires removal of the glovebox or lower dashboard trim on Citroën C5 X7 and Peugeot 407 to reach the actuator.
- Unplug the electrical connector and remove the mounting screws securing the servo motor.
- Fit the new actuator, ensuring the spline or mounting boss meshes correctly with the flap shaft; tighten screws to the original torque and reconnect the electrical plug.
- Reassemble trims, reconnect the battery, and run the climate control through its functions to confirm correct movement and position. Some systems require a simple recalibration procedure via the vehicle controls—consult vehicle repair information if required.
Common Failure Reasons
Heater servo motors typically fail due to a combination of age, wear and environmental factors. The most common causes are:
- Worn internal motor brushes or gears leading to loss of torque or intermittent operation.
- Broken or stripped plastic gear teeth or splines that prevent the flap from moving.
- Water ingress or condensation inside the heater box causing corrosion or electrical faults.
- Connector corrosion or wiring faults at the actuator plug.
- Mechanical obstruction or debris in the heater box that overloads the actuator.
Actuator life varies with use and environment; failures commonly appear after several years or under high mileage, particularly in vehicles exposed to moisture or lacking regular interior maintenance.
Notes For Purchase
When ordering, check the product codes listed above (EAD516, P1975001, 42 647949 / 647949) to ensure correct fitment for Citroën C5 X7 and Peugeot 407 applications. This part is intended as a direct replacement for the original HVAC actuator on the specified models.
