Description
BLAUPUNKT RD4 Car Radio With CD For Citroën And Peugeot Vehicles. The Radio Must Be Programmed/Coded To The Vehicle Using Diagnostic Equipment.
Product Overview
OEM BLAUPUNKT RD4 CD head unit designed for a range of Citroën and Peugeot models. This unit is a direct replacement for factory-fitted radios and is frequently sought by workshops and DIY enthusiasts under original part numbers. It restores original functionality including radio reception and CD playback and keeps the vehicle interior looking factory-original.
Compatibility
Typical applications include Citroën: C2, C3 I, C4, C8 and Peugeot: 207, 307 II, 807. Check part numbers listed in the Technical Information to confirm fitment for specific vehicle years and equipment levels.
Technical Information
- Manufacturer: Blaupunkt
- Model: RD4
- Product Codes: 9659138977, 9647521077, 9660646877
- Additional Numbers: 657932, 6579PC
Function And Typical Features
The RD4 is a factory-style radio with integrated CD player designed for PSA Group vehicles. It provides standard AM/FM reception and single-disc CD playback, and is built to match original dashboard aesthetics and mounting points. As an OEM-type unit it uses the vehicle’s original wiring and controls.
Installation Recommendations
For safe and reliable replacement follow these steps: always disconnect the vehicle battery before starting work; remove trim panels carefully to avoid breaking clips; unscrew and extract the old radio using appropriate tools; disconnect all plugs and aerial connectors; fit the replacement unit and reconnect connectors firmly; reassemble trim. After mechanical installation the unit must be programmed/coded to the vehicle with appropriate diagnostic equipment so that radio functions and any integrated steering wheel controls operate correctly. Always follow the vehicle manufacturer’s removal and installation procedure to avoid electrical damage.
Why This Part Commonly Fails
Failures are most often caused by mechanical wear in the CD mechanism, dirt or foreign objects in the drive, intermittent contacts or corrosion at electrical connectors, and water damage from leaking sunroofs or windows. Buttons and illumination may degrade with age, and units removed from vehicles sometimes need reprogramming to restore full functionality.
Notes For Professionals And DIY Mechanics
This radio is commonly referenced by the part numbers listed above, so including those numbers in searches will increase chances of finding the correct replacement. For reliable final commissioning use PSA-compatible diagnostic tools (DiagBox/Lexia) to ensure correct programming and retention of vehicle features. If you are replacing the unit in a vehicle equipped with steering-wheel controls or extended CAN features, expect to perform coding to re-enable those functions.
Quick Installation Tips
- Use correct radio removal keys or tools to avoid damaging the chassis.
- Inspect the antenna connector and ground points for corrosion; poor reception often stems from connector issues.
- Secure all wiring harnesses to prevent rattle and intermittent faults.
