Description
Radio and Trip Computer Display For Citroën C4 First Series
This display unit is suitable for Citroën C4 first generation models and handles both radio information and trip computer readouts. It is commonly referenced by OE codes such as 9665614780 and module identifiers 6155GX / 6155GY, so customers and workshops often locate the part using those numbers. Designed for mechanics and experienced DIYers, this unit restores visual feedback for audio, clock, mileage and on‑board computer messages when the original screen becomes unreadable or unresponsive.
Technical Information
- Manufacturer: Stellantis (Citroën)
- Model: Citroën C4 I (First Series)
- Product Codes: 9665614780, 9665614780-01
- Other Numbers: 6155GX, 6155GY
Function And Application
The display presents radio station data, audio source, clock, trip information and warning/message texts from the vehicle’s on‑board computer. It is a direct replacement for the factory screen in Citroën C4 Mk1 dashboards and integrates with the existing radio and instrument cluster wiring harness.
Typical Failure Modes
- Backlight Deterioration Or LED Failure: Screen Becomes Dim Or Dark Over Time.
- Pixel Damage Or Glass Delamination Causing Lines, Dead Pixels Or Invisible Segments.
- Connector Or Ribbon Cable Wear: Intermittent Or Complete Loss Of Signal Due To Corrosion Or Broken Contacts.
- Moisture Ingress From Leaks Leading To Corrosion And Display Faults.
- Internal Power Supply or Driver Circuit Faults Causing Flicker Or No Display.
How Often It Fails
Failure Frequency Depends On Age, Exposure To Sunlight And Moisture, And Usage. In Practice, Units From Vehicles Older Than Eight To Fifteen Years Are Most Likely To Develop Backlight Or Pixel Issues. Environmental Factors And Repeated Thermal Cycling Accelerate Wear.
Replacement Procedure (Overview)
Recommended For Qualified Technicians Or Experienced DIYers. General Steps:
- Disconnect The Negative Battery Terminal Before Starting To Prevent Short Circuits And Avoid Damage To Electronic Modules.
- Carefully Remove Surrounding Trim Pieces Around The Centre Console Using Plastic Trim Tools To Avoid Scratching.
- Unscrew The Fasteners Securing The Radio/Display Module And Slide The Unit Out Gently.
- Disconnect Electrical Connectors And Any Ribbon Cables From The Rear Of The Display, Observing Pin Orientation.
- Fit The Replacement Display, Reconnect The Connectors Securely And Reassemble The Trim In Reverse Order.
- Reconnect The Battery And Verify Full Functionality Of Radio, Clock, Trip Computer Messages And Any Steering Wheel Controls.
Installation Recommendations
- Always Disconnect The Battery Before Removing Or Installing The Display To Protect Sensitive Electronics.
- Use Appropriate Trim Removal Tools To Avoid Damaging The Dashboard Finish.
- Inspect Connectors For Corrosion And Clean Contacts If Necessary Before Reassembly.
- Avoid Touching The Display Surface And Connector Pins With Bare Hands To Prevent Static Damage And Contamination.
- After Installation, Check All Display Functions And Address Any Error Messages Shown On The Instrument Cluster.
Why Choose This Part
Replacing a faulty display restores clear information from the radio and trip computer without the need to replace the entire head unit. Using the correct OE codes (e.g., 9665614780 / 6155GX) ensures a direct fit and correct electrical compatibility with Citroën C4 Mk1 dashboards.
Notes For Search And Identification
Customers And Workshops Frequently Search Using OE Numbers Or Module Codes. Use The Listed Product Codes When Searching Online Or In Parts Catalogs To Find The Correct Display For Citroën C4 First Series.
