Description
Overview
Original-equipment Continental RD4N1M car radio with CD and MP3 support, intended for use in Citroën and Peugeot vehicles. This unit appears under several OEM codes and is commonly fitted to a range of PSA models. It provides standard radio functions, CD playback and MP3 compatibility, with OEM integration into the vehicle electrics and CAN bus systems.
Key Features
- CD player with MP3 playback support (RD4N1M platform)
- OEM integration for Citroën and Peugeot vehicles (CAN/vehicle coding required)
- Direct replacement for specified OEM part numbers for plug-and-play fit where connectors match
- Compatible with factory antenna and steering wheel controls when correctly coded and adapted
Compatibility And Notes
Designed for PSA models including Citroën Berlingo III, C2, C3, C4, C8 and Peugeot 207, 307, 407, 807, Partner III. Before purchase, verify the unit part number on the vehicle and confirm connector types. In many vehicles the radio must be coded to the vehicle with diagnostic equipment to enable full functionality (radio authorization, steering wheel controls, clock, CAN settings). Adapters may be required for aerial, ISO harness or steering-wheel-control interfaces on some aftermarket installations.
Installation Guide (For Technicians And Experienced DIY)
Typical replacement steps:
- Disconnect the negative battery terminal to avoid short circuits.
- Remove surround trim and unscrew radio mounting bolts. Use appropriate trim tools to avoid damage.
- Pull the radio out, unplug the antenna, power, speaker and data connectors.
- Install the replacement unit, reconnect all harnesses and secure the radio in the dash.
- Reconnect the battery and perform diagnostic coding with a suitable PSA diagnostic tool to authorize and configure the unit.
Common Faults And Causes
Failures commonly seen on these units include CD mechanism jams, failing disc read laser, intermittent power or audio due to connector corrosion or broken solder joints, and display or button failures caused by wear or moisture ingress. Older units may show reduced reliability due to age, thermal cycling and mechanical wear. Proper diagnosis should include power, ground and CAN data checks before replacing the unit.
Practical Advice
When fitting a used or replacement OEM radio, always confirm part numbers and connector compatibility. Keep vehicle battery disconnected during mechanical work and ensure the unit is coded to the vehicle to restore features such as audio authorization and steering wheel control functions. If aftermarket wiring adapters are used, ensure proper grounding and secure connections to avoid noise or intermittent faults.
Technical Information
Manufacturer: Continental (OE Supplier) / PSA Citroën Peugeot
Model: RD4N1M CD MP3 Radio
Product Codes: 96627394XT, 6564ZG
Other Numbers: 96643698XT, 657919, 657920, 16077504XT
