Description
CD car radio for CITROËN C5 from 2005 to 2007. The radio must be coded to the vehicle using diagnostic equipment.
Product Overview
OEM CD head unit (RD4 / N1) designed for PSA Group vehicles. This original-style radio provides factory-fit radio reception and CD playback, preserving dashboard aesthetics and OEM controls. Ideal for professional garages and experienced DIY enthusiasts who require a direct replacement that integrates with vehicle wiring and steering-wheel controls when properly coded.
Compatibility
- Primary Fitment: Citroën C5 II (model years 2005–2007)
- Commonly Compatible With: Selected Peugeot 407 models and other PSA vehicles equipped with RD4/N1 radio units — verify head unit shape and connector match.
How It Works And Why Coding Is Required
This unit provides AM/FM radio and CD playback using the original factory interfaces. Many PSA-era head units are secured by vehicle security and vehicle-network pairing; after replacement the radio often needs to be coded (paired) to the car so it recognizes vehicle CAN/comfort modules and permits full functionality (audio source selection, steering-wheel controls, display messages and anti-theft measures).
Installation Procedure (Summary)
- Disconnect the battery before starting to avoid short circuits and protect vehicle electronics.
- Remove surrounding trim panels carefully to access the radio mounting screws.
- Unscrew and slide the original unit out, unplug antenna, power and speaker harnesses and any additional connectors (CAN/steering control interface, microphone, etc.).
- Connect the replacement unit, check connectors are fully seated, then secure the radio and reassemble trim.
- After mechanical installation, the unit must be coded/programmed to the vehicle using PSA diagnostic equipment so that it functions correctly with the vehicle’s systems.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: RD4 N1 CD Radio
- Product Codes: 9650574977, 6564V1, 6564V2
- Other Numbers: 9659143077
Installation Recommendations
For reliable results, have a professional install and code the unit using PSA diagnostic tools (DiagBox / Lexia / PP2000). If you install the unit yourself, ensure the battery is disconnected before removal and reconnection. Keep the original unit and any coding data if possible—cloning or transferring configuration from the old unit can speed up reactivation and preserve settings. Check connector pins for corrosion and ensure the antenna feed is correctly attached to avoid reception issues.
Most Common Failure Causes
- CD Mechanism Wear: Moving parts and the laser assembly can fail or misalign over time, causing read errors or inability to load discs.
- Connector or Power Issues: Corroded connectors, broken wires, or intermittent power supply faults cause unit resets or loss of function.
- Water Ingress and Heat: Moisture or prolonged heat exposure damages internal electronics and solder joints.
- Software/Pairing Problems: After replacement the radio may be locked or incompatible until properly coded to the vehicle network, leading users to think the unit is faulty.
Notes For Buyers
Unit is sold as a direct-replacement OEM-style radio. Ensure the physical shape and connector layout match your vehicle before purchase. Because the radio requires diagnostic coding, plan for professional coding or have the necessary equipment and experience to perform the coding yourself.
