This Clarion radio unit (part number 96635824XT) is a direct-fit audio solution designed for a range of PSA vehicles. It provides the standard in-car radio functions required by technicians and competent DIYers replacing factory head units on older Citroën and Peugeot models. Units of this type are commonly referenced by OEM codes 6564JV, 6564JW, 6564LR and 6564TZ, so customers often search by these numbers when sourcing a replacement.

Key Features And Benefits

• Direct replacement for factory radios on compatible Citroën and Peugeot models.
• Retains factory look and basic audio functions, easing installation in original dashboards.
• Recognised by common OEM codes for fast identification: 96635824XT, 6564JV, 6564JW, 6564LR, 6564TZ.
• Good option for workshops and experienced DIY mechanics who can perform wiring and coding operations.

Technical information

• Manufacturer: Clarion
• Model: Citroën C2, Citroën C3, Citroën C8, Citroën Berlingo, Peugeot 206, Peugeot 307, Peugeot 807, Peugeot Partner
• Product Codes: 96635824XT
• Other Numbers: 6564JV, 6564JW, 6564LR, 6564TZ

Installation And Replacement Guide

Typical replacement steps for an experienced technician or competent DIYer:

• Disconnect the vehicle battery before starting to prevent short circuits and protect vehicle electronics.
• Remove trim panels surrounding the radio using appropriate trim tools to avoid damage to plastic clips.
• Unscrew mounting fasteners and gently slide the radio out of the dash.
• Disconnect the factory wiring harnesses and antenna lead. Keep track of any adapter plugs or brackets required.
• Install the replacement unit, reconnect harnesses and antenna, secure with original fasteners and test basic power and audio functions.
• Complete the required coding/programming step with suitable diagnostic equipment to re-enable the unit on the vehicle (see coding note below).

Coding And Activation

This radio requires coding/programming to the vehicle using diagnostic equipment. Programming is typically performed with PSA diagnostic tools (for example DiagBox/Lexia/PP2000 or equivalent) so that the unit is recognised by the vehicle and any anti-theft lock is cleared. If the radio is not coded correctly it may remain locked or have limited functionality.

Installation Recommendations

• Use correct PSA harness adapters when available to avoid cutting factory wiring.
• After installation, verify power, speaker outputs and antenna reception before final assembly of trim.
• When possible, perform the coding step with a diagnostic tool capable of handling PSA radio modules to ensure full compatibility.
• Follow safety instructions and manufacturer procedures for removal and fitting to avoid damage to dashboard components.

Why This Part Typically Fails

• Electrical Faults: Voltage spikes, poor grounding or wiring issues can damage internal electronics.
• Moisture Ingress: Water leaks or high humidity can corrode connectors and components.
• Wear And Age: Mechanical parts (if present), fading solder joints or failing internal capacitors may lead to intermittent operation over time.
• Software/Anti-Theft Lock: Loss of coding or failed initialization after battery replacement or unit swap can make the radio appear non-functional until reprogrammed.

Practical Notes For Workshops

Searchability is high for the listed OEM codes; technicians often order replacement units using numbers such as 96635824XT or the additional codes 6564JV / 6564JW / 6564LR / 6564TZ. Ensure you allow time for coding when scheduling the job, as programming is required to restore full functionality after installation.

Replace Your Vehicle’s Original RD4 Head Unit With A Direct-Fit Blaupunkt RD4 CD Radio (OE-Fit For Citroën/Peugeot). This unit Is A Robust Option For Workshops And Experienced DIYers Looking For An OEM-Style Replacement: It Provides Reliable Radio Reception And CD Playback In Vehicles Where The RD4 Standard Was Factory-Fitted. Ideal For Mechanics Searching By Part Number (9664769677, 657932, 6579PC, N1-02), The Unit Integrates With Original Wiring Harnesses And Preserves Factory Aesthetics When Properly Installed And Coded.

Technical Information

Manufacturer: Blaupunkt / Stellantis (Original Equipment)

Model: RD4 N1-02 (CD)

Product Codes: 9664769677

Other Numbers: 657932, 6579PC, N1-02

Compatible Models

Citroën Berlingo (B9), Citroën C2, Citroën C3, Citroën C3 Picasso, Citroën C3 Pluriel, Citroën C4, Citroën C8, Peugeot 207, Peugeot 307 II, Peugeot 807, Peugeot Partner Tepee.

Function And Typical Faults

The RD4 Head Unit Provides AM/FM Radio Reception And CD Playback With Integration Into The Vehicle’s Electrical System. Common Failure Modes Include Faulty CD Mechanism (Mechanical Wear Or Jamming), Display Or Button Malfunctions Due To Age, Power Loss From Blown Fuses Or Corroded Connectors, And Software/Immobiliser Locking That Requires Diagnostic Pairing To Restore Full Functionality. Electronic Components Such As Electrolytic Capacitors May Degrade Over Time, Causing Intermittent Power Or Audio Issues.

How Often Units Fail And Why

Failures Are Most Likely In Vehicles Older Than A Decade, Especially Where Units Have Been Exposed To High Humidity, Temperature Cycles, Or Frequent Use Of The CD Mechanism. Mechanical Wear On Moving Parts (Tray/Spindle/Laser) And Connector Corrosion Are The Most Frequent Causes. Electrical Faults Caused By Poor Grounding Or Aftermarket Modifications Can Also Lead To Unit Malfunction.

How To Replace

1. Disconnect The Negative Terminal Of The Battery Before Starting Work To Avoid Short Circuits Or Data Loss.
2. Remove Surrounding Trim Panels Carefully Using Plastic Trim Tools To Avoid Damage.
3. Unscrew The Factory Head Unit Fasteners And Slide The Unit Out Gently.
4. Disconnect The Antenna Cable, Wiring Harnesses, And Any Additional Connectors (Steering Wheel Control, Microphone If Present). Inspect Connectors For Corrosion Or Bent Pins.
5. Install The Replacement Unit By Reversing The Procedure: Connect Harnesses, Secure The Unit, Refit Trim.

Pairing And Coding

This Radio Requires Diagnostic Pairing/Coding To The Vehicle. Pairing Is Typically Performed With A Compatible PSA Diagnostic Tool (DiagBox/Lexia/PP2000) Or Equivalent Workshop Equipment To Unlock Features And Ensure Proper Communication With The Vehicle’s Bus Systems. If The Unit Is Not Coded, It May Remain Locked Or Exhibit Limited Functionality.

Installation Recommendations

Installations Should Be Performed By Experienced Technicians Or Skilled DIYers Familiar With PSA Electrical Systems. Check And Replace Any Blown Fuses Before Assuming The Radio Is Faulty. Ensure All Earth Connections Are Clean And Tight. If Retaining Steering Wheel Controls Or Other Vehicle Integrations, Verify That Adapters Or Interface Modules Are Compatible With The RD4 Standard. After Installation, Perform Diagnostic Pairing And Verify Radio, Antenna, And Control Functions.

Reason Why The Part Most Commonly Fails

The Most Common Reason For Failure Is Mechanical Wear Of The CD Mechanism And Connector Corrosion Leading To Power Or Signal Loss. Environmental Factors (Moisture, Heat), Age-Related Component Degradation, And Electrical Issues Caused By Poor Grounds Or Aftermarket Modifications Are Frequent Contributors.

The Siemens VDO RD4 N1-00 is a direct-fit factory head unit used across a range of PSA Group vehicles. This single-DIN unit combines AM/FM radio with a front-loading CD player and full integration with vehicle controls, providing reliable in-car entertainment and RDS station identification. Ideal for workshops and DIY mechanics replacing an original RD4 unit, this part restores factory functionality and keeps steering wheel controls and dashboard integration intact (when fitted on the vehicle).

Key Benefits

• Direct OEM fit for many Citroën and Peugeot models — preserves original look and control functions.
• CD playback and RDS radio for clear station and track information.
• Retains steering wheel audio controls and display information where vehicle wiring and equipment allow.
• Sold under manufacturer reference numbers commonly searched by mechanics and parts buyers.

How It Works And What It Does

The RD4 N1-00 is the factory radio unit responsible for radio reception, CD playback and communicating basic audio commands to the vehicle’s audio system. In vehicles equipped with steering wheel controls or multifunction displays, the unit exchanges data over the vehicle bus to show station and track info and to respond to user inputs from the steering wheel.

Replacement Procedure (Overview)

• Disconnect the vehicle battery before starting work to avoid short circuits and unit damage.
• Remove trim panels surrounding the radio, then extract the head unit using the appropriate removal keys or fastener removal tools.
• Unplug the antenna connector and the vehicle wiring harness connectors from the rear of the unit.
• Fit the replacement unit, reconnect the antenna and wiring harness, reassemble trim and reconnect the battery.
• Perform diagnostic pairing/programming so the radio is authorized and fully functional within the vehicle’s electronic network.

Recommended Installation

Disconnect the battery and follow the vehicle manufacturer’s removal procedure to avoid damage. Because the RD4 radio must be paired/programmed to the vehicle electronics, we recommend using PSA diagnostic equipment (DiagBox/Lexia) or having the final coding performed by a workshop with the appropriate tools. Proper coding ensures the unit is fully integrated with the vehicle’s controls and prevents audio or authorization errors.

Common Failure Causes

• CD Mechanism Wear: Mechanical parts and optical reading components in the CD drive degrade over time, causing read errors or inability to load discs.
• Power Supply Issues: Corroded contacts, blown internal fuses or voltage spikes can lead to intermittent power loss or complete unit failure.
• Button/Display Wear: Frequent use and sun exposure can cause faded displays, unresponsive keys or backlight failure.
• Software/Authorization Problems: Units that are not coded to the vehicle may display errors or be locked; diagnostic programming is required to restore full operation.

Technical Information

• Manufacturer: Siemens VDO
• Model: RD4 N1-00
• Product Codes: 96624490XT, 16077504XT, 6564AK
• Other Numbers: N1-00

Why Choose This Unit

For workshops and experienced DIY mechanics replacing a factory RD4 radio, this Siemens VDO unit restores original functionality and appearance. It is suitable for vehicles listed in the compatibility section and is frequently referenced by its product codes in parts searches, making it easy to identify and order the correct replacement.

Compatibility (Examples)

Commonly fitted to Citroën models: Berlingo III, C2, C3, C4, C8. Commonly fitted to Peugeot models: 207, 307, 407, 807, Partner III. Always confirm the unit’s reference number matches the original unit on the vehicle before installation.

Final Notes

This unit requires diagnostic pairing/programming to the vehicle. Follow safe working practices when removing and installing the head unit to avoid damage to connectors and vehicle electronics.

Product Description

High-quality OEM Continental RD4N1M CD head unit with MP3 playback designed for many Citroën and Peugeot models. This unit offers reliable radio reception, CD playback and MP3 file support from CD media. It is a direct-fit replacement for vehicles equipped with the original RD4N1M system, making it suitable for workshops and experienced DIY mechanics who need an OE-style audio solution.

Fitment And Compatibility

Common fitment includes Citroën and Peugeot models such as Citroën C2, C3 I, C4, C8 and Peugeot 207, 307 II, 807. The unit is often referenced by OE/product numbers and may be listed under multiple part codes—check the numbers below when searching or ordering.

How It Works And What It Does

The unit functions as an in-dash radio tuner and CD player with MP3 playback capability. It provides audio output to the vehicle speaker system and connects to the vehicle wiring harness and antenna. In many vehicles the head unit must be coded/programmed to the car’s electronics to restore full functionality (see technical note below).

Replacement Procedure (Step-by-step)

1. Before starting, disconnect the vehicle battery to avoid short circuits and protect vehicle electronics.
2. Remove surrounding trim panels carefully using appropriate trim tools to avoid damage.
3. Unscrew and slide the head unit from the dash using the correct removal keys or screws.
4. Unplug the main wiring harness(es), antenna connector and any auxiliary or microphone leads.
5. Install the replacement unit by reversing the removal steps: connect harnesses, secure the unit, re-fit trim and reconnect the battery.
6. Perform the required diagnostic coding/programming so the radio is recognized and fully functional with the vehicle systems.

Installation Recommendations

Always disconnect the battery prior to removal/installation and follow the vehicle manufacturer’s service procedures to avoid damage. Because this radio requires diagnostic coding to the vehicle, coding should be performed with appropriate PSA diagnostic tools. If you are not experienced with PSA programming tools, we recommend installation and coding by a professional workshop equipped for Citroën/Peugeot diagnostics.

Technical Information

Manufacturer: Continental
Model: RD4N1M (CD with MP3)
Product Codes: 9665751777
Additional Numbers: 657992, 657990, 657989, 657937, 657935, 657934, 6579PC

Common Failure Causes

Failures typically result from mechanical wear in the CD mechanism, dust or debris in the loader, moisture ingress or corrosion on connector pins, intermittent power supply (blown fuses or poor ground), and age-related electronic component failures (capacitors, solder joints). Units swapped between cars without proper diagnostic coding can exhibit limited functionality until they are correctly programmed.

Why Choose This Unit

This Continental OE head unit is the correct replacement for vehicles originally fitted with the RD4N1M system and preserves factory look and operation. It is suitable for mechanics and competent DIYers who can perform physical replacement and arrange required diagnostic coding.

This OEM-style handsfree microphone is designed for Citroën and Peugeot cars, providing clear voice capture for Bluetooth calls and voice commands. Ideal for professional mechanics and DIY enthusiasts, the unit matches original equipment part numbers 96429749XT and 6563L5 and is commonly fitted to models such as Citroën C8 and Peugeot 807. Reliable voice pickup reduces background noise and improves call quality for in-car communication systems.

Key Benefits

– Direct replacement for factory microphone assemblies with OEM fitment and mounting points.
– Improves call clarity and voice recognition performance.
– Compatible with original handsfree modules and factory Bluetooth systems on specified models.
– Useful spare for workshops: often searched by part number (96429749XT, 6563L5).

Where It Is Located And What It Does

The microphone is typically mounted in the vehicle roof lining, overhead console, or sun visor area near the interior lights and central cabin sensors. Its function is to capture the driver’s and passengers’ voice for the vehicle’s handsfree phone system and voice control. A properly functioning microphone ensures clear handsfree calls and reliable voice-command recognition.

Replacement Procedure (Overview)

1. Disconnect the vehicle battery before starting to avoid short circuits and to prevent damage to electronic systems.
2. Access the microphone by removing the overhead console, interior light bezel, or relevant trim piece — depending on the vehicle model.
3. Release the retaining clips or screws, unplug the microphone connector from the harness, and remove the old unit.
4. Fit the new microphone in the correct orientation, connect the harness, secure the mounting, and reassemble trim.
5. Reconnect the battery and test the handsfree system for voice clarity and correct operation.

Recommended Installation

– Always disconnect the battery before removal/installation to protect vehicle electronics.
– Follow manufacturer trim removal procedures to avoid breaking clips or damaging the headliner.
– When working near airbags or curtain modules, observe safety precautions and keep wiring clear of airbag deployment paths.
– After fitment, verify audio level, background noise, and voice recognition performance in a road test or stationary test with windows closed.
– If radio or handsfree faults persist after replacement, inspect wiring and connectors for corrosion or damage.

Technical Information

Manufacturer: Stellantis (Citroën/Peugeot)

Model: Citroën C8, Peugeot 807

Product Codes: 96429749XT, 6563L5

Additional Numbers: NFP

Why This Part Fails Most Often

– Moisture Ingress: Water leaks from sunroofs, door seals, or roof seams can cause corrosion or short the microphone element.
– Connector Corrosion or Loose Contact: Oxidised or poorly seated connectors cause intermittent or total audio loss.
– Physical Damage: Impact during interior repairs, dropped components, or wear from repeated removal can damage the microphone capsule.
– Wiring Damage: Chafed or pinched cables behind the headliner can break signal continuity.
– Age And Component Wear: Over time the microphone element or preamplifier can degrade, reducing sensitivity and clarity.

Notes For Professionals And DIYers

Searches often use the OEM part numbers 96429749XT and 6563L5 — include these in your listings and workshop records to help quick identification. When replacing the microphone, also check the associated wiring and roof harness for signs of water entry or rodent damage to prevent repeat failures.

Product Overview

This Magneti Marelli RT3-N3-02 head unit combines a CD player with integrated navigation and GSM-related connectivity designed for PSA (Citroën/Peugeot) vehicles. It is an OEM-style unit commonly fitted in early 2000s models. Ideal for professional workshops and experienced DIYers looking to replace or upgrade the factory radio while keeping original vehicle functionality such as steering wheel controls and integrated navigation.

Key Features

• Factory OEM Head Unit: RT3-N3-02 series with CD and navigation.
• Designed For PSA Vehicles: Commonly used in Citroën and Peugeot models from the same era.
• Supports Vehicle Integration: Works with factory wiring, steering wheel controls and vehicle CAN systems after proper pairing/coding.
• Includes CD Mechanism And Navigation Software: Provides original navigation interface and media playback.

Technical Information

• Manufacturer: Magneti Marelli (OEM For Stellantis).
• Model: RT3-N3-02.
• Product Codes: 14956410XT, 6574F1, RT3-N3-02.
• Additional Numbers: NFP (as marked).
• Compatible Models: From A Citroën C8 (2003); may also fit Citroën C5 and Peugeot 807—verify fitment by connector and dash dimensions before installation.

Installation Recommendations

• Safety First: Always disconnect the vehicle battery before removing or installing the unit to avoid short circuits and prevent damage to electronic modules.
• Removal/Installation: Remove surrounding trim, unscrew mounting screws and carefully extract the unit. Unplug the PSA-specific multi-pin harness, antenna connector and any auxiliary or GSM antenna leads.
• Electrical Checks: Verify power, ground and illumination circuits at the harness before plugging in the replacement unit. Check antenna continuity for radio reception.
• Pairing/Coding: The unit must be paired/programmed to the vehicle using diagnostic programming. Use PSA service tools (DiagBox/PP2000/Lexia) or equivalent to authorise the radio, enter security code if required and enable vehicle features. After coding the unit should integrate with the vehicle’s CAN functions and steering wheel controls.
• Professional Equipment Recommended: For coding and advanced configuration it is recommended to use PSA diagnostic equipment or have the procedure performed by a qualified technician with appropriate tools.

Why This Part Commonly Fails

Failures on RT3-series units are typically age-related and can result from mechanical wear and environmental factors. Common causes include:

• Worn Or Faulty CD Mechanism/Optical Pickup Leading To Read Errors.
• Corroded Or Loose Connectors Causing Intermittent Power Or Signal Loss.
• Failure Of Internal Components Such As Electrolytic Capacitors After Years Of Use.
• Navigation Unit Or Storage Faults Resulting In Map Or Boot Errors.
• Water Ingress Or Heat Damage Due To Poor Sealing Or Harsh Operating Conditions.

Units from early 2000s vehicles are more likely to develop these faults due to normal wear; replacing the unit or repairing specific modules is a common solution.

Notes For Buyers

Contains OEM part numbers for search and fitment: 14956410XT, 6574F1, RT3-N3-02. Confirm dash opening and connector compatibility before purchase. This unit originates from a Citroën C8 (2003) and is sold as shown; it requires diagnostic pairing to the vehicle to restore full functionality.

Blaupunkt RD4 T5 N2 is a direct-fit OEM-style head unit commonly found in Stellantis vehicles such as Citroën C8 and Peugeot 807. This radio offers a compact single-DIN body with CD playback and factory integration features. If you are searching by part number, use identifiers 9660646577, 6564QT, 6564QV or 6579PS to quickly find compatible replacements. The unit’s OEM mounting and connector layout make it suitable for professional workshops and experienced DIY mechanics who perform radio swaps and vehicle coding.

Technical Information

Manufacturer: Blaupunkt

Model: RD4 T5 N2

Product Codes: 9660646577, 6564QT

Additional Numbers: 6564QV, 6579PS

Function and Features

This is a CD car radio designed for factory integration in Citroën and Peugeot models. Key functional points: CD playback, FM/AM radio reception, and two antenna inputs to support diversity reception or a separate amplified antenna feed. The unit communicates with the vehicle’s electrical system and may require software pairing (coding) to restore full functionality after replacement.

Compatibility

Commonly fitted to Citroën C8 and Peugeot 807 models equipped with the RD4 head unit. When searching for this part, customers and technicians often use the part numbers listed above for fast identification.

Replacement Procedure (How To Replace)

• Disconnect the vehicle battery or ensure ignition is off to avoid short circuits during removal.
• Carefully remove the trim surrounding the head unit using plastic trim tools to avoid damage to panels.
• Release the radio using the appropriate removal keys or undo the retaining screws, then slide the unit out of the dash.
• Disconnect all electrical connectors, antenna plugs (note there are two), and any external amplifier leads.
• Install the replacement unit by connecting harnesses and antenna leads in the correct positions, slide the radio into the bracket and secure it.
• Perform vehicle coding/registration with a diagnostic tool so the radio is recognized by the vehicle’s systems and steering wheel controls (if fitted).
• Verify radio, CD playback and antenna reception, then reassemble trim panels and reconnect the battery if disconnected.

Installation Recommendations

Always use the correct removal keys or service tools to prevent damage to the radio and dash trim. Label connectors during removal if uncertain about their locations. Ensure both antenna plugs are fully seated; poor antenna connections are a frequent cause of weak reception. After mechanical installation, use a dealer-level or professional diagnostic tool to code the radio to the vehicle—without coding some functions (e.g., vehicle integration, steering wheel controls) may not work. Check and, if necessary, replace retention screws or mounting brackets that are corroded or damaged to ensure secure fitment.

Common Causes Of Failure

Typical reasons these head units fail include mechanical wear of the CD mechanism from heavy use, moisture ingress or condensation causing corrosion on connectors or internal components, electrical surges or poor grounding, and intermittent faults due to damaged antenna connectors. Faulty wiring or blown fuses in the vehicle’s audio circuit can also render the unit inoperative. Regular diagnostics of antenna continuity and power/ground feeds helps pinpoint issues before they cause permanent damage.

Why This Part Is Searched By Part Number

Technicians and DIYers frequently search by OEM numbers (9660646577, 6564QT, 6564QV, 6579PS) because they guarantee compatibility with the vehicle’s dashboard and connector layout. Including these codes in your search improves the chance of finding the exact fitment and saves time during replacement.

This description is aimed at professionals and experienced DIY mechanics who need clear technical data, installation guidance and compatibility references when replacing an OEM Blaupunkt RD4 T5 N2 radio in Citroën and Peugeot vehicles.

This OEM Siemens VDO RD4N1-02 CD radio is a direct-fit replacement for a range of Citroën and Peugeot models. Ideal for professional workshops and experienced DIY mechanics, the unit restores full factory functionality and maintains original dashboard aesthetics. The radio is commonly searched by its part numbers, so listing the codes below helps you find the exact match quickly.

Compatibility And Use Case

Designed for original equipment fitment in Citroën and Peugeot cars listed below. Suitable for vehicles that require the RD4N1-02 radio platform and factory connector interfaces. Recommended for replacing faulty factory radios with CD mechanism or radio units that lost pairing/programming with the vehicle.

Technical Information

• Manufacturer: Siemens VDO
• Model: RD4N1-02 (CD Radio)
• Product Codes: 96647697XT, 16077504XT, 6564ZS, 6564ZT
• Other Numbers: RD4N1-02

Compatible Models

• Citroën Berlingo III
• Citroën C2
• Citroën C3
• Citroën C4
• Citroën C8
• Peugeot 207
• Peugeot 307
• Peugeot 407
• Peugeot 807
• Peugeot Partner III

Installation Recommendations

• Before starting, disconnect the negative terminal of the battery to avoid short circuits and protect vehicle electronics.
• Remove trim panels and radio surround using appropriate plastic trim tools to prevent damage to trim pieces.
• Unscrew mounting bolts and gently slide the radio from the dash. Carefully unplug all electrical connectors and the antenna lead.
• Inspect connectors and wiring for corrosion or damage. Replace any brittle wiring or corroded terminals before installing the replacement unit.
• Fit the new radio, reconnect antenna and electrical plugs, secure mounting bolts and refit trim panels.
• After mechanical installation, the radio must be programmed/paired to the vehicle with diagnostic equipment to restore full functionality and remove anti-theft locks. Use dealer-level or PSA-compatible diagnostic tools (e.g., DiagBox/PP2000) or equivalent workshop equipment for coding.
• Reconnect the battery only after reassembly is complete. Verify radio operation, CD loading/ejection, and all audio functions before returning the vehicle to the customer.

Why This Part Most Often Fails

• Worn CD Mechanism: Frequent CD use accelerates wear of the tray, spindle motor and optical pickup, causing read errors or mechanical jams.
• Age-Related Electronic Failure: Electrolytic capacitors and solder joints can degrade over many years, leading to intermittent faults, loss of power or audio dropouts.
• Moisture And Corrosion: Water ingress or high humidity can corrode connectors and circuit boards, especially in vehicles exposed to damp conditions.
• Power Surges And Battery Events: Jump-starts, battery replacements or voltage spikes can damage internal electronics if correct procedures are not followed.
• Connector Damage: Broken antenna plug or harness pin damage during previous repairs often causes poor reception or loss of function.

Practical Notes For Mechanics

• Commonly searched by part numbers 96647697XT, 16077504XT, 6564ZS, 6564ZT and RD4N1-02 — keep these handy when sourcing the unit.
• Check the vehicle for previous repair evidence (wet seats, dashboard damage, aftermarket installations) that could have affected the original radio.
• Save time by verifying connector types and mounting dimensions before the job; the RD4N1-02 is an OEM-format unit but trim brackets and fascia may vary by model year.

How Often Failures Occur

Failures are more frequent on older vehicles (typically 8–15+ years) and in cars with heavy CD use or exposure to moisture. Electronic degradation and mechanical wear accumulate over time; proactive checks during scheduled service can help identify issues early.

Final Advice

This radio is intended for professionals and competent DIYers comfortable with dashboard disassembly and vehicle coding. When fitted and coded correctly, it restores factory radio functions and retains original vehicle appearance. If you require programming, ensure you have access to appropriate PSA diagnostic equipment or a qualified workshop to complete the pairing process.

OEM Continental RD4N1M head unit offering CD and MP3 playback, designed as a direct replacement for many Citroën and Peugeot models. This unit preserves original mounting, connectors and dashboard integration for a clean factory-like fit. Frequently searched by part numbers, it is intended for professional workshops and experienced DIY mechanics who perform vehicle electronics work and radio coding.

Technical Information

Manufacturer: Continental (Original Equipment for Citroën/Peugeot)
Model: RD4N1M CD
Product Codes: 9664769777, 657992
Additional Numbers: 657990, 657989, 657937, 657935, 657934, 6579PC, 96647697XT
Compatible Models: Citroën/Peugeot 207; 307 II; 807; C2; C3 I; C4; C8

Fitment And Use

This unit is an OEM-style replacement for the listed Citroën and Peugeot models. It mounts into the original radio slot and uses factory wiring plugs, retaining steering wheel control compatibility when properly coded. Many customers locate this radio by its product codes, so check the part number against the unit being replaced before installation.

Installation Recommendations

Before starting, always disconnect the negative battery terminal to avoid risk of short circuits or damage to vehicle electronics. Typical replacement steps:

• Carefully remove trim panels around the radio using appropriate plastic pry tools to avoid damaging the dash.
• Unscrew and slide the radio out of the cage, then disconnect antenna, power and speaker connectors.
• Transfer any brackets or harness adapters if required and connect the new unit in reverse order.
• Reconnect the battery only after the unit is secured and connectors are in place.

After mechanical installation, the radio must be programmed to the vehicle using diagnostic equipment to restore full functionality (coding and security pairing). If you do not have the required diagnostic tool, have the coding performed by a qualified workshop with PSA diagnostic capability.

Why Units Fail And Typical Lifespan

Head units like the RD4N1M can remain functional for many years, but failure rates increase with age and operating conditions. Common causes of malfunction include:

• Heat and prolonged sun exposure causing electronic component degradation.
• Moisture ingress or corrosion at connectors.
• Mechanical wear of the CD mechanism (sticking, skipping or failure to read discs).
• Power surges or interrupted supply during battery changes or jump starts causing software lockups.
• Aging capacitors or solder joints inside the unit.

Regular use, clean environment and careful battery handling extend service life.

Recommended Tools And Skills

Ideal for professional mechanics or experienced DIYers. Recommended tools include trim removal tools, Torx/screwdriver set and, for final commissioning, PSA-compatible diagnostic tool for coding. If steering wheel controls or other integrated functions are not working after installation, diagnostic coding is required.

Notes On Programming

This radio requires diagnostic programming to the vehicle to restore full functionality and security pairing. Make sure coding and initialization are performed by personnel with appropriate diagnostic equipment and experience.

Why Choose This Unit

If you want a factory-fit radio with CD and MP3 playback for your Citroën or Peugeot, the Continental RD4N1M offers direct compatibility with original dashboard integration and connector layout. Purchasing by part number listed above is common practice and helps ensure you receive the correct replacement unit.

High-quality Continental RD4N1M-03 CD/MP3 radio designed for many Stellantis Citroën and Peugeot models. This OE-style head unit is commonly searched by part numbers (96662669XT, 96662669XT03, 16077504XT) and fits vehicles where the RD4 system was originally specified. Ideal for mechanics and DIY enthusiasts who need a reliable replacement radio that preserves original functionality and vehicle aesthetics. The unit supports CD and MP3 playback and integrates with the vehicle’s factory wiring harness and steering wheel controls where applicable.

Compatibility

• Peugeot 207
• Peugeot 307 (II)
• Peugeot 807
• Citroën C2
• Citroën C3 (I)
• Citroën C4
• Citroën C8

Technical Information

• Manufacturer: Continental (Produced for Stellantis)
• Model: RD4N1M-03
• Product Codes: 96662669XT, 96662669XT03, 16077504XT
• Other Numbers: 6574PW, 6574PX

Installation Recommendations

• Always disconnect the battery before starting removal or installation to avoid electrical damage.
• Remove trim panels and unscrew the radio using appropriate radio removal keys or tools. Carefully pull the unit forward and disconnect the wiring harnesses and antenna connector.
• Check connector pins and wiring for corrosion or damage before mating the replacement unit.
• After physical installation, the radio must be coded/registered to the vehicle using PSA diagnostic tools (DiagBox/PP2000) to restore full functionality (radio enable, steering wheel control mapping, etc.).
• Test all functions (radio reception, CD/MP3 playback, steering wheel controls, mute/phone integration if present) before reassembling the trim.

How To Replace (Practical Steps)

1. Disconnect the negative battery terminal and wait a few minutes.
2. Remove surrounding trim and fasteners to access the head unit.
3. Use radio keys or appropriate tools to extract the RD4 unit from the dash.
4. Unplug the main wiring connector, antenna cable and any auxiliary plugs.
5. Install the replacement unit by reversing the removal steps, reconnect connectors and secure the radio.
6. Reconnect the battery and perform diagnostic coding with DiagBox/PP2000 to pair and activate the unit.

Most Common Failure Reasons

• Electrical Issues: Blown fuses, power surges or poor ground connections can cause loss of power or erratic behavior.
• Connector Corrosion: Moisture or road salt can corrode harness pins, leading to intermittent faults or audio dropouts.
• Mechanical Wear: The CD mechanism and loading tray are mechanical parts that wear over time and commonly fail on older units.
• Software/Locking: Unit may require diagnostic coding or unlocking after replacement; without coding the radio may be disabled or limited.
• Physical Damage: Impact, water ingress or exposure to high temperatures can permanently damage internal components.

Why Choose This Unit

Replacement RD4N1M-03 radios are a practical choice for maintaining factory appearance and integration. Supplying the correct part number (e.g., 96662669XT) in searches increases the chance of finding a direct-fit unit. For workshop efficiency, keep diagnostic equipment (DiagBox/PP2000) on hand to complete the coding step and avoid return visits.