The main advantage of this radio is its seamless integration with the vehicle’s electronic system. However, installation of the device requires professional diagnostics to ensure proper connection and functionality with the vehicle’s onboard system. This specification is particularly important to maintain the existing functions of your vehicle and to ensure that the new radio will operate without issues.

Technical Information

• Manufacturer: PSA CITROEN PEUGEOT
• Model: Citroën C5, 2005-2007
• Product Codes: 9650574977, 9659143077, 6564V1, 6564V2, NFP
• Other Numbers: RD4 N1 9659143077 6564V1

Overall, the RD4 N1 car radio offers top-notch performance and hassle-free integration, making it a valuable investment for any Citroën C5 owner. Please note that due to technical specifications and integration requirements, installation by a professional is recommended. By taking this approach, you ensure that your new radio will be fully functional and without complications. For more information and to purchase this car radio, do not hesitate to visit our e-shop or contact our customer support. We are here to ensure a smooth journey to upgrading your vehicle.

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.

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.