Description
Blaupunkt RD4 N2 MP3 car radio with CD and MP3. Color HXF – Gray Bruni Gloss. The radio must be coded/paired to the vehicle via diagnostic. Taken from a Peugeot 407 2007.
This original-equipment RD4 N2 head unit offers reliable CD playback and MP3 support in the OE fitting that suits many PSA vehicles. The unit retains factory mounting dimensions and connector layout, making it a direct replacement for systems specified with the RD4 N2 radio. Its OEM appearance (Gray Bruni Gloss finish, code HXF) preserves the interior look while restoring in-car audio functionality.
Technical Information
- Manufacturer: Blaupunkt (OE for Stellantis/Peugeot-Citroën)
- Model: RD4 N2
- Product Codes: 9660647677, 657952
- Additional Numbers: 657951, Color code HXF (Gray Bruni Gloss)
Compatibility
Unit origin: Peugeot 407 (2007). The RD4 N2 unit is commonly fitted to PSA vehicles that originally used the RD4 platform. Before installation, confirm that the part numbers printed on the housing match the vehicle’s required radio code and connector layout.
Installation Recommendations
- Always disconnect the battery before starting removal or installation to avoid electrical damage.
- Remove trim panels carefully to access radio mounting; use appropriate removal keys or trim tools to avoid breakage.
- Release the unit from its chassis, unplug the main harness, antenna lead and any auxiliary connectors.
- Fit the replacement unit, reconnect all plugs and secure the radio into the dash before reconnecting the battery.
- Coding/Pairing: This radio requires diagnostic coding or pairing to the vehicle’s system to restore full functionality (anti-theft locking and certain CAN functions). If you do not have PSA diagnostic equipment, have coding performed by a workshop equipped for Peugeot/Citroën diagnostics.
Why This Part Often Fails
- Mechanical wear of the CD mechanism and laser unit, leading to read errors or failure to accept/eject discs.
- Moisture ingress or connector corrosion causing intermittent power or audio faults.
- Electrical issues from vehicle battery disconnects or voltage spikes that can corrupt firmware or lock anti-theft functions requiring coding.
- Failure to properly code or pair the unit after replacement can result in limited or no functionality.
Practical Tips
Carry out a bench test of basic functions (power up, CD read, audio output) before final reassembly. Keep original part numbers (9660647677 / 657952 / 657951) visible when comparing fitment. If the radio shows anti-theft lock messages or limited features after installation, diagnostic coding is necessary to restore normal operation.
