Description
Car radio with CD for CITROËN C5 from 2005 to 2007. The radio must be coded to the vehicle using diagnostic equipment.
High-quality RD4 series car radio (RD4 N1) designed for Citroën/Peugeot vehicles, featuring an integrated CD player and original equipment part numbers 9657312777, 6564V1, 6564V2. This unit is a direct-fit replacement for many C5 installations and is a practical choice for professional workshops and experienced DIY mechanics. The sturdy build and OEM mounting make it straightforward to install into the standard radio slot, while the retained factory functions (audio controls, steering wheel integration where applicable) preserve vehicle ergonomics. Include model and product codes when searching or ordering to ensure fast and accurate matching on Google and parts databases.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C5 (2005–2007); also fitted to some Peugeot 407 variants
- Product Codes: 9657312777, 6564V1, 6564V2
- Additional Numbers: 9650574977, 9659143077
Compatibility Notes
Designed primarily for Citroën C5 second generation models produced between 2005 and 2007. Some Peugeot 407 vehicles use the same RD4 platform — confirm fitment by matching the product codes listed above. Factory steering wheel controls and CAN bus functions are retained when the unit is correctly installed and coded.
How To Replace
Step-by-step for experienced technicians or competent DIYers:
- Disconnect the negative battery terminal before starting to avoid short circuits or damage to vehicle electronics.
- Remove the trim surrounding the radio using appropriate plastic trim tools to avoid scratching panels.
- Unscrew and slide out the original radio, gently disconnecting the antenna, power, speaker and any CAN/connector plugs.
- Fit the replacement unit, reconnect all harnesses and antenna, and secure the radio to the dash.
- Reattach trim and reconnect the battery.
- Perform diagnostic coding/programming so the radio is recognized by the vehicle (see installation recommendations below).
Installation Recommendations
The radio requires programming/coding to the vehicle with diagnostic equipment to enable full functionality. Recommended options:
- Programming with PSA-compatible diagnostic tools (DiagBox / Lexia / PP2000) to register the unit to the car and enable CAN/steering wheel controls.
- If you lack the diagnostic tool, have the coding performed by a qualified technician with PSA service equipment.
- Always disconnect the battery before removal and follow manufacturer procedures to prevent damage to the unit and vehicle electronics.
Why This Part Commonly Fails
- Mechanical wear of the CD mechanism and laser lens degradation after years of use, causing read errors or refusal to load discs.
- Broken or seized CD tray due to worn gears or foreign objects in the mechanism.
- Electrical faults from poor connections, corroded pins in the harness, or intermittent power supply problems (fuses, ignition-switched power).
- Moisture ingress or thermal stress leading to electronic component failure on the radio’s circuit board.
- Software/configuration mismatches where the unit is not coded to the vehicle, resulting in partial or no functionality.
Service Life and Practical Tips
These RD4 units typically start showing issues in vehicles of this age range due to mechanical wear and environmental exposure. When replacing, use correct part codes to match connectors and mounting. If intermittent audio or control issues occur after fitting, re-check wiring, fuses and perform the vehicle coding procedure to ensure full integration with the vehicle’s CAN system.
