Valeo headlight control unit designed for automatic headlamp leveling on selected Citroën models. This electronic module manages the vertical aim of Xenon headlamps, ensuring correct beam alignment under varying vehicle loads and driving conditions. Frequently searched by part numbers, this unit is listed under 9658054280 and 6224K8 and is suitable for technicians and experienced DIY motorists working on Citroën C4 and C5 II vehicles.

The module interfaces with suspension or height sensors and the headlamp actuators to maintain legal and safe illumination. Replacing a faulty unit restores proper headlight alignment, reduces glare for oncoming traffic and eliminates dashboard warnings related to the headlamp system. Ideal for garages, body shops and independent mechanics who require a direct-fit electronic control unit from a recognized supplier.

Technical Information

• Manufacturer: Valeo
• Model: Citroën C4; Citroën C5 II
• Product Codes: 9658054280, 6224K8
• Additional Numbers: 6224R6, 6224R5, NFP

Installation Recommendations

• Disconnect The Battery Before Starting Work To Avoid Short Circuits And Unintended Airbag/Body Control Reactions.
• Locate The Unit—It Is Often Mounted Near The Headlamp Assembly Or Inside The Engine Bay Close To The Front Wiring Harness; Remove Any Protective Covers Or Brackets.
• Carefully Unplug Electrical Connectors And Inspect For Corrosion Or Bent Pins; Clean Connectors If Necessary Before Fitment.
• Mount The Replacement Unit Securely Using The Original Fasteners; Ensure Gaskets Or Seals Are Correctly Seated To Prevent Moisture Ingress.
• Reconnect The Battery And Cycle Ignition; Verify Headlamp Leveling Operation. Note: Some Vehicles Require Adaptation Or Calibration Via A Diagnostic Tool After Replacement.
• After Installation, Verify Proper Beam Aim On A Level Surface Per Local Regulations And Test Drive To Confirm Automatic Correction Functionality.

Common Failure Causes

• Moisture Ingress And Corrosion—Water Penetration Into The Unit Or Connectors Is A Frequent Cause Of Failure, Especially In Older Headlamp Assemblies Or Vehicles Exposed To Road Salt.
• Electrical Surges Or Faulty Wiring—Shorts, Poor Grounds Or Damaged Wiring Can Damage Internal Electronics.
• Mechanical Wear—Worn Headlamp Actuators Or Height Sensors Can Place Excessive Load On The Module, Leading To Premature Failure.
• Thermal Stress—Repeated Heating And Cooling Cycles In The Engine Bay May Degrade Components Over Time.

This control unit is a direct-replacement part commonly referenced by its part numbers (9658054280 / 6224K8). When ordering, confirm the part code matches the unit being replaced to ensure fitment. Suitable For Professional Repair Shops And Competent DIYers Comfortable With Vehicle Electrical Systems.

Order now to restore correct headlamp leveling and eliminate related dashboard warnings—ideal for maintaining safe nighttime visibility and compliance with road safety standards.

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.