Product Overview

This Bluetooth module provides phone connectivity, hands‑free audio and USB interface functions for a range of Citroën and Peugeot models. Designed as the vehicle’s multimedia interface, it handles Bluetooth phone calls, audio streaming (A2DP), USB media playback and data communication with the vehicle’s head unit. Commonly searched by part numbers, this module is an OEM solution listed under several product codes—entering the part number in the shop search improves the chance of a direct match.

Compatibility And Application

Fits various Stellantis‑group vehicles from Citroën and Peugeot. Typical compatible models include:

• Citroën C4 Picasso
• Citroën C5 X7
• Peugeot 308

Compatibility can depend on build year, trim and radio/navigation variant. Customers often locate this part by referencing the product code printed on the module or the vehicle parts list.

Installation Recommendations

• Disconnect Battery Before Work: Always disconnect the vehicle battery before removing interior trim or electrical modules to avoid short circuits and protect vehicle electronics.
• Access Location: The module is typically mounted behind the radio, inside the glovebox or in the center console depending on model and equipment level. Remove surrounding trim panels and the head unit to reach the connector block.
• Connector Handling: Release locking tabs gently and avoid pulling on wires. Inspect connector pins for corrosion or damage before fitting the replacement.
• Configuration And Pairing: After physical installation, pair phones and USB devices. In some vehicle configurations the module may require software initialization or adaptation with PSA diagnostic tools (DiagBox) to restore full telephone and multimedia functionality—perform by a qualified technician if needed.
• Reassembly: Refit trims carefully and check that no wiring is pinched. Reconnect the battery and verify that Bluetooth, phone, and USB functions operate normally.

Why The Part Commonly Fails

Failing symptoms include loss of Bluetooth connectivity, intermittent hands‑free audio, non‑recognition of USB devices or complete module silence. Common causes are:

• Moisture Ingress Or Corrosion: Water leaks or high humidity can corrode connectors and solder joints.
• Electrical Faults: Voltage spikes, poor ground connections or short circuits can damage internal electronics.
• Mechanical Stress: Repeated plugging/unplugging of USB devices or rough handling during previous repairs can loosen connectors or damage ports.
• Software Or Pairing Errors: Corrupted firmware or mismatched pairing data may require reinitialization or configuration via diagnostic tools.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Bluetooth / Phone / USB Interface Module
• Product Codes: 9675359580, S180073002, M
• Other Numbers: 6574TS, 6574TT, 6579PQ, 6574QR, 96750284XN, 16077679XN, 16077683XH

Notes For Professionals

Ideal For Mechanics And Experienced DIY Enthusiasts: Keep diagnostic equipment available for full verification after installation. Inspect vehicle wiring harnesses for previous damage and ensure firmware and head unit software versions are compatible where applicable. Reuse of original connectors is acceptable when undamaged; otherwise replace connectors or harness sections to ensure long‑term reliability.

This Continental RD4N1M-03 CD head unit is an original-equipment style radio for Peugeot 308 vehicles. Designed to integrate with the vehicle’s factory CAN systems and dashboard controls, it retains the OEM appearance (Warm Silver HXH) while offering CD playback and standard radio functions. The unit is commonly referenced by part numbers and product codes, so customers and technicians often search using these codes when sourcing replacements.

Technical Information

• Manufacturer: Continental
• Model: RD4N1M-03 / Peugeot 308
• Product Codes: 96766652XH, 96766652XH00, 6574QR
• Other Numbers: 96750284XN, 16077679XN, 16077863XH

Fitment And Compatibility

Compatible With Peugeot 308 vehicles equipped from factory with the RD4N1M-03 radio. Always Verify The Part Number Printed On The Existing Unit Matches One Of The Codes Above Before Installation. This Unit Is Used In Stellantis Group Vehicles Where RD4 Series Head Units Were Fitted.

Function And Benefits

The radio provides factory-style audio control, CD playback and radio reception while integrating with steering wheel controls and vehicle menus when applicable. Replacing a faulty unit restores full audio functionality and maintains the OEM look of the dashboard. Using the correct replacement part preserves vehicle features and avoids electrical or communication errors.

Typical Failure Modes And Lifespan

Common Causes Of Failure Include Mechanical Wear Of The CD Mechanism, Moisture Ingress Or Condensation, Connector Corrosion, Electrical Surges Or Faulty Power Supply, And Software Or Communication Errors. Failure Likelihood Increases With Age And Exposure To Humidity Or Improper Electrical Conditions. Many Units Start To Show Problems After Years Of Service, Especially In Vehicles Exposed To Moist Environments.

Installation Recommendations

• Disconnect The Negative Battery Terminal Before Starting To Prevent Short Circuits And Preserve Vehicle Electronics.
• Use Appropriate Trim Tools To Remove Dash Panels Without Damage. Radios Often Require Release Keys Or Screws Accessible After Removing Trim.
• Carefully Unplug All Wiring Harnesses, Antenna Connector And Any CAN Or MOST Fiber Connectors Present.
• Fit The Replacement Unit, Reconnect Harnesses And Antenna, Reassemble Trim.
• After Mechanical Installation, The Unit Must Be Coded/Programmed To The Vehicle Using Diagnostic Equipment (For Example Diagbox Or Equivalent) To Restore Full Functionality And Integration.
• Check Fuses And Ground Connections If Issues Persist; Verify Software Versions If Radio Functions Are Limited.

Why This Part Is Frequently Replaced

Radio Units Are Exposed To Daily Use, Temperature Swings, And Sometimes Moisture From Cabin Conditions. The CD Mechanism Is A Moving Part Prone To Wear, And Electrical Problems Or Software Faults Can Appear Over Time. Replacing The Unit Is A Practical Solution To Restore Audio Functionality, Prevent Intermittent Electrical Faults, And Maintain Factory Integration.

Keywords For Search: Peugeot 308 Radio, Continental RD4N1M-03, 96766652XH, 6574QR, 96750284XN, 16077679XN, 16077863XH, CD Radio Replacement.