Description
Blaupunkt RD4 N2 MP3 car radio with CD and MP3. Color HXF – Bruni Grey Gloss. The radio must be coded to the vehicle via diagnostics. It is from a 2007 Peugeot 407.
Product Overview
The Blaupunkt RD4 N2 is an OEM-style radio unit offering FM/AM reception, CD playback and MP3 file support. Designed for PSA Group vehicles, this unit is commonly found in Peugeot and Citroën models and carries original equipment part numbers used by Stellantis. The unit delivers a factory-fit look and retains steering wheel control compatibility when installed correctly and coded to the vehicle.
Technical Information
- Manufacturer: Blaupunkt (OEM fitment for Stellantis)
- Model: RD4 N2
- Product Codes: 9660647677, 657952, 657951
- Additional Numbers: Color Code HXF (Bruni Grey Gloss); Stellantis / Citroën / Peugeot references
Compatibility
Commonly fitted to: Peugeot 407 (example vehicle: 2007) and Citroën C5 II. Suitable for vehicles equipped with the RD4-style radio harness and factory mounting. Verify radio form factor and connector type before installation.
Installation And Replacement Guide
Basic replacement steps for an experienced mechanic or competent DIYer:
- Disconnect the negative battery terminal before beginning work.
- Remove trim panels surrounding the radio to access mounting screws.
- Unscrew and carefully slide the radio from the dash, then unplug the antenna, power and speaker/vehicle connectors.
- Fit the replacement unit, reconnect connectors and antenna, and secure the radio in the mount.
- Reconnect the battery and carry out the required vehicle coding so the radio is recognized by the vehicle electronics.
Note: After physical installation the unit must be coded to the vehicle using diagnostic tools so that steering wheel controls, CAN-bus messaging and anti-theft settings are properly enabled.
Installation Recommendations
- Perform installation in a clean, dry workspace to avoid damage to mechanical parts and connectors.
- Use appropriate trim tools to prevent panel damage and keep all screws and clips for reassembly.
- Ensure antenna connection is secure to avoid reception issues and check speaker outputs after coding.
- If uncertain about coding or integration with vehicle electronics, have the unit coded by a workshop equipped with PSA diagnostic tools.
Why This Part Fails Most Often
Common failure causes for RD4 units include mechanical wear of the CD mechanism and laser assembly, accumulation of dust or dirt affecting the tray and optical pickup, aging solder joints or electrolytic capacitors on the radio’s power board, and moisture exposure. Symptoms typically include refusal to read CDs, intermittent audio, loss of station memory or failure to boot until coded again.
Buying Advice
This unit is a direct-fit replacement for vehicles that originally equipped an RD4 N2 radio. It is ideal for workshops and experienced DIYers who can perform physical installation and ensure proper diagnostic coding. Product codes listed above are commonly used when searching for compatible units—enter them to find matching parts quickly.
How Often It Fails
Longevity depends on usage and environment. CD mechanisms and lasers are the most vulnerable parts and typically show wear after many years of use or heavy disc playback. Proper installation and avoiding moisture or excessive heat will extend the service life.
