Description
Control Unit – Automatic headlamp leveling unit for Citroën C4 and C5 II vehicles.
This Valeo headlight control unit (Xenon leveling module) with part numbers 9651116480 and 6224K8 is designed for Citroën C4 and Citroën C5 II models equipped with automatic headlamp correction. The unit maintains proper beam aim under varying vehicle load and road conditions, preventing glare and ensuring legal and safe illumination. Frequently searched by product code (9651116480, 6224K8, 6224R5, 6224R6), this module is a direct-fit replacement for vehicles using the Valeo Xenon control system.
Technical Information
- Manufacturer: Valeo
- Model: Citroën C4; Citroën C5 II
- Product Codes: 9651116480; 6224K8
- Other Numbers: 6224R5; 6224R6; 00; NFP
Function And Benefits
The Unit Controls The Automatic Correction Of Headlamp Aim Based On Vehicle Pitch And Load. It Interprets Signals From Level Sensors And Adjusts The Headlamp Actuators To Keep The Beam Within Legal Limits. Benefits Include Consistent Road Illumination, Reduced Glare For Oncoming Traffic, And Preservation Of Nighttime Visibility.
Replacement And Installation Overview
Replacement Requires Basic Electrical And Mechanical Skills. Typical Steps: Disconnect The Vehicle Battery To Prevent Short Circuits; Access The Module Behind The Headlamp Assembly Or Under The Bumper Depending On Model; Disconnect Electrical Connectors And Fasteners; Remove The Faulty Unit And Install The New One In Reverse Order. After Installation, Clear Any Headlight Fault Codes From The Vehicle ECU. On Some Vehicles, Initialization Or Adaptation Of The Leveling System May Be Required Using A Diagnostic Tool Or Service Scanner.
Installation Recommendations
- Work With The Battery Disconnected To Avoid Short Circuits And Airbag/ECU Disturbances.
- Protect Connectors From Moisture And Ensure Pins Are Clean Before Reassembly.
- Use Proper Tools To Avoid Damaging Fasteners; Replace Any Damaged Seals Or Grommets To Prevent Water Ingress.
- Check Related Fuses And Wiring If Fault Codes Persist After Replacement.
- If The Vehicle Displays Persistent Faults Or Adaptive Behavior, Perform Initialization/Adaptation With A Suitable Diagnostic Tool.
Most Common Failure Reasons
Failures Are Commonly Caused By Moisture Ingress And Corrosion Of Electrical Contacts, Thermal Stress From Repeated Heating And Cooling, Voltage Spikes Or Faulty Vehicle Electrical System, And Mechanical Wear Or Seizure Of Headlamp Actuators. Road Salt And Poor Sealing Accelerate Degradation. Symptoms Usually Include Headlight Aiming Fault Warnings, Flickering Or Loss Of Automatic Leveling, And Intermittent Operation.
This Control Unit Is Intended For Mechanics And Experienced DIY Enthusiasts Looking For A Reliable Replacement By Part Number. Using The Correct Product Code Ensures Compatibility With The Vehicle Headlamp System And Simplifies Diagnosis And Repair.
