This BSI (Body System Interface) unit BSI04EV K04-00 is a genuine control module used on Stellantis vehicles such as Citroën and Peugeot. It centralizes comfort and body electronics functions—lighting, central locking, wipers, interior electrics and communication with other control units. The unit is commonly searched by product numbers (9664059080, 6580SS, 657062, 28120836-4, 28119248-3) and is suitable for Peugeot 407 applications equipped with the BSI04EV K04-00 specification. Designed for professional workshops and experienced DIYers, this module helps restore full body-electronics functionality when the original BSI fails.

Technical Information

• Manufacturer: Johnson Controls (used on Stellantis Citroën/Peugeot)
• Model: Peugeot 407
• Product Codes: BSI04EV, K04-00, 9664059080
• Additional Numbers: 01, 6580SS, 657062, 28120836-4 (BOOT), 28119248-3 (HARD)

Function And Typical Applications

The BSI is the central comfort and body electronics control unit. It manages lighting, interior and exterior switches, central locking, wipers, alarm and communication with other ECUs. On Peugeot 407 vehicles it acts as a gateway for multiple subsystems and coordinates inputs from switches and sensors to activate relays and outputs.

How The Unit Is Replaced

• Disconnect the negative battery terminal before any work to avoid short circuits or data corruption.
• Remove lower dashboard trim panels to access the BSI module—location varies by model year but is commonly behind the glovebox or under the dash on the passenger side.
• Unplug electrical connectors carefully, release retaining clips and remove mounting screws.
• Install the replacement BSI in reverse order, ensuring connectors and grounds are clean and fully seated.
• After mechanical installation, verify functionality and read fault codes with a diagnostic tool. Programming or synchronization of the immobilizer/keys may be required using manufacturer-level diagnostics (e.g., DiagBox/Lexia) to restore full vehicle communication.

Installation Recommendations

• Always Disconnect Battery And Observe ESD Precautions: Protect the module from static discharge and avoid handling circuit board contacts.
• Mark Connectors And Take Photos Before Removal: Helps ensure correct reconnection and reduces reassembly time.
• Check Fuses And Ground Points: Failures are often accompanied by blown fuses or poor grounds—inspect and rectify before fitting a new module.
• Use A Diagnostic Tool After Fitment: Clear fault codes, run actuator tests and, if needed, perform key/immobilizer synchronization or BSI coding with manufacturer-level software.
• Avoid Powering The Unit With Loose Connectors: Ensure all connectors are fully engaged before reconnecting the battery.

Why This Part Most Commonly Fails

• Moisture Ingress And Corrosion: Water leaks or condensation can corrode connector pins and PCB tracks.
• Electrical Surges And Poor Battery Connections: Voltage spikes or unstable power supply damage internal electronics.
• Connector Wear And Vibration: Repeated vibration or loose connectors cause intermittent faults or broken contacts.
• Age-Related Electronic Component Degradation: Over time relays, capacitors and solder joints can fail, especially in high-heat environments.

This BSI unit is ideal for mechanics and experienced DIYers who need an original-spec control module for Peugeot 407 vehicles using the BSI04EV K04-00 variant. Verify the product and additional numbers listed in the Technical Information to ensure correct fitment for your vehicle before installation.

This comfort control module plays a crucial role in the vehicle’s electronic system, managing various body functions such as lighting, central locking, and other integrated system controls. Ensuring the proper functionality of this module guarantees enhanced control and comfort for your vehicle.

Technical Information:

• Manufacturer: Johnson Controls
• Model: Citroën C8, Peugeot 807
• Product Codes: 9664059080 01, 6580SA, 6580ZE
• Additional Numbers: BOOT 28120836-4, HARD 28119248-3 C

This used BSI module has been carefully removed from a Citroën C8 and is ready for reinstallation. Customers often search for this part using the listed product codes, making it easy to find the exact component needed for specific vehicle models.

Investing in a quality used part is a cost-effective solution and supports sustainability by extending the service life of original components. Whether you are a professional mechanic or a passionate DIYer, this BSI module delivers the reliability and functionality essential for your vehicle.

Purchase this essential auto part from us and enjoy not only a functional component but also the satisfaction of restoring your Citroën C8 or Peugeot 807 to full working condition. Don’t wait too long, as high-quality parts like this tend to sell out quickly!

Overview

BSI04EV K04-00 body control module (BSI) by Johnson Controls for Citroën and Peugeot vehicles is a commonly replaced comfort and central electronics unit. This unit controls lighting, central locking, wipers, interior electronics and communicates with the instrument cluster and immobiliser. It is often searched by part numbers such as 9664059080, 1663370780, 657064 or K04-00 — include these numbers when searching to locate the correct unit quickly. This description is written for professional technicians and experienced DIY mechanics who service Citroën/Peugeot vehicles.

Technical Information

• Manufacturer: Johnson Controls
• Model: Citroën C4 Grand Picasso (From 2008)
• Product Codes: BSI04EV, K04-00, 9664059080, 02 1663370780, 657064, 1663370780
• Other Numbers: BOOT 28120836-4, HARD 28119248-3B

Fitment And Compatibility

This BSI unit is fitted to Citroën C4 Grand Picasso models from around 2008 and to vehicles within the PSA group that use the BSI04EV K04-00 hardware. Compatibility must be confirmed by matching the unit’s part numbers listed above. Searching by the OEM numbers (9664059080, 1663370780, 657064) will help you find matching units and cross-references.

Function And Symptoms

The BSI (Body System Interface) is the central comfort electronics module. It manages functions such as central locking, interior and exterior lighting logic, wiper control, convenience features, and data exchange with the dashboard and immobiliser. Faulty BSI units commonly produce symptoms like intermittent or permanent loss of central locking, non-functional interior lights, erratic wiper behaviour, dashboard warning lights, immobiliser or starting problems, and multiple electrical anomalies that are otherwise hard to trace.

Replacement Procedure (Summary)

Replacement of the BSI typically involves these steps: disconnect the negative battery terminal before any work; remove relevant trim or glovebox to access the unit; unscrew mounting fasteners and carefully unplug multi-pin connectors; install the replacement unit and secure connectors; reconnect the battery and perform necessary coding/initialisation (see coding section). Handle the unit with ESD precautions and avoid connector pin damage. If the vehicle has immobiliser integration, additional steps for transponder/key adaptation may be required.

Installation And Coding – Important

• The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
• Options For Commissioning:
1. Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
2. Virginisation And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
• Recommended To Be Performed By A Technician With PSA Service Equipment (DiagBox/Lexia/PP2000).
• Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damaging The Unit.

Installation Recommendations

Always isolate the battery negative before starting. Inspect and clean connector pins and earth points before fitting the new unit. Protect the module from static discharge and moisture. Tighten mounting bolts to original torque and ensure no wiring is pinched behind trim. After mechanical installation, perform the appropriate coding or cloning procedure using DiagBox/Lexia/PP2000 to restore full functionality.

Why This Part Fails Most Often

Common failure causes include water ingress and corrosion (especially in vehicles with compromised seals), thermal stress and solder joint fatigue, voltage spikes from poor battery/alternator regulation, and connector corrosion. Electrically induced damage from incorrect jump-starting or short circuits can also destroy internal components. Regular failure signs are intermittent electronics, sporadic central locking, or complete loss of certain comfort functions.

Notes For Mechanics And DIYers

When diagnosing BSI-related faults, always check fuses, grounds and connector integrity before replacing the module. If uncertain about coding or immobiliser adaptation, seek assistance from a technician equipped with PSA diagnostic tools. Use the listed part numbers to ensure you obtain the correct BSI04EV K04-00 version for the vehicle.

Overview

The BSI (Body Systems Interface) BSI04EV K04-00 is a comfort / central body control unit used in Citroën and Peugeot vehicles. Manufactured by Johnson Controls and fitted on selected Stellantis models, this module manages a wide range of vehicle convenience and safety functions such as central locking, interior lighting, wiper and washer logic, power windows, alarm and keypad/remote interactions. Technicians and DIYers commonly identify this part by its reference numbers and module code listed below.

What This Unit Does

This BSI acts as the central gateway for many low-voltage vehicle functions: it receives inputs from switches and sensors, processes the information and commands actuators or other modules. Typical responsibilities include managing door locks, interior lighting timing, remote key recognition, comfort delays, alarm triggers and sometimes CAN-bus communication handling between subsystems.

Fitment And Compatibility

Primary fitment: Citroën C4 Grand Picasso (from 2010) and closely related platform derivatives. The module is labeled with multiple manufacturer and product numbers (see Technical Information). Because BSI variants and software/hardware revisions exist, always compare the module codes listed in the Technical Information with the part fitted in the vehicle to confirm compatibility.

Replacement Procedure (General Guidance)

1. Preparation: Park the vehicle on a level surface, engage the handbrake and remove ignition key. Wear an anti-static wrist strap if available. Before any work on the BSI, disconnect the negative battery terminal to avoid short circuits and to protect the electronics.
2. Access: The BSI is typically located behind the glovebox or under the dashboard on the passenger side depending on the model. Remove trim panels or glovebox as required to gain clear access to the unit.
3. Disconnect: Carefully unplug electrical connectors—press release clips and avoid pulling on wiring. Note connector positions and retaining screws.
4. Swap Unit: Replace the module and re-fit connectors and fasteners. Reconnect the battery only after the module is mechanically secured.
5. Coding and Initialization: Most BSI replacements require cloning or coding to the vehicle (see Installation and Coding – Important). After vehicle-side procedures are completed, verify central locking, lights, windows and alarm functions before reassembling interior panels.

Installation And Coding – Important

• The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
• Options To Put The Unit Into Service:
  1. Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
  2. Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
• Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
• Before Removal/Installation Always Disconnect The Battery And Follow The Manufacturer Procedure To Avoid Damaging The Unit.

Why This Part Fails Most Often

Common failure causes include water ingress from leaking seals or sunroof drains, corrosion of connectors, electrical surges (battery disconnects performed incorrectly or jump-starting errors), and internal component wear after many years in service. Intermittent faults often present as erratic central locking, loss of remote functions, blown fuses, or multiple seemingly unrelated convenience features failing at once—typical signs of BSI malfunction or communication errors on the vehicle network.

Recommendations For Installation

Have access to proper diagnostic and coding tools when replacing a BSI. If cloning is chosen, ensure a verified full EEPROM/Flash dump is obtained from the original unit. If virginizing and coding, use DiagBox or an approved PSA solution and follow the exact initialization sequence. Always disconnect the negative battery terminal before work, avoid static discharge, and inspect connector pins for corrosion or damage. After installation, run a full vehicle scan and test all convenience functions before refitting trim panels.

Technical Information

Manufacturer: Johnson Controls / Stellantis Compatibility
Model: BSI04EV K04-00
Product Codes: 9664059080, 1663370780, 657064, K04-00
Additional Numbers: 28119248-3B, 28120836-4

Useful Notes For Mechanics

Search and ordering are commonly performed by the module reference numbers above. When diagnosing, check fuses and wiring integrity first—many faults attributed to the BSI are actually caused by power supply issues or poor ground connections. For coding and key adaptation follow PSA procedures and consider professional service for vehicles with immobilizer and key programming requirements.

This BSI04EV (K04-00) comfort control unit is a direct-fit, used Johnson Controls module designed for a range of Citroën and Peugeot models. Frequently searched by part numbers such as 9678477180, 1613316380 or 1663366080, this unit handles body and comfort electronics — central locking, interior lighting, window and wiper commands, alarm/immobiliser interface and communication with other vehicle modules. It is aimed at professional mechanics and experienced DIY enthusiasts who need a reliable replacement BSI for PSA (Stellantis) vehicles.

Key Benefits

Fast identification by original product codes improves findability and reduces downtime. The unit restores lost or erratic comfort functions, fixes intermittent electrical faults related to body electronics and can be commissioned either by cloning or by initialization and coding procedures. Ideal for workshops that have PSA diagnostic tools and for owners repairing their own vehicles with the right equipment and know‑how.

Technical Information

• Manufacturer: Johnson Controls (for Stellantis/PSA)
• Model: BSI04EV K04-00
• Product Codes: 9678477180, 1613316380, 1663366080
• Other Numbers: 28119248-3C, 28120836-4
• Applicable Models: Citroën C4 Picasso, Citroën C5, Peugeot 3008 I, Peugeot 5008 I (verify exact fitment by code)

Installation And Coding – Important

• The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
• Options for commissioning:
  1. Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
  2. Virginisation and subsequent initialization/telecoding via DiagBox (or online) + key adaptation.
• Recommended to be performed by a specialist with PSA service equipment (DiagBox/Lexia/PP2000).
• Before removal/installation always disconnect the battery and follow the manufacturer’s procedure to avoid damaging the unit.

Recommended Installation

• Disconnect the negative battery terminal and wait a few minutes before starting work to avoid short circuits and data corruption.
• Locate the BSI (usually behind the glovebox or under the dashboard); handle the unit and connectors carefully to avoid bent pins.
• Ensure all connectors and ground points are clean and corrosion‑free. Replace damaged seals to prevent future water ingress.
• After mechanical installation, perform cloning or virginisation and coding using DiagBox/Lexia/PP2000 as required for full functionality (see section above).
• Check fuses and perform a full function test: central locking, interior lights, wipers, windows, immobiliser and communication with other control modules.

Why This Part Fails Most Often

• Water Ingress And Corrosion: Moisture reaching the unit or its connectors causes corrosion and intermittent faults.
• Electrical Surges And Poor Grounding: Voltage spikes, incorrect jump‑starting or weak grounds can damage internal electronics.
• Age And Thermal Stress: Repeated heating/cooling cycles and solder joint fatigue can lead to component failure.
• Connector Damage Or Pin Corrosion: Faulty wiring, loose pins or poor connector mating results in loss of functions.

Helpful Notes

Mechanics searching for this part often use the product codes 9678477180, 1613316380 or 1663366080 — include those in your diagnostics and ordering process. Proper commissioning is critical: a physically identical BSI may still need cloning or telecoding to operate correctly with vehicle immobiliser and key set.

Compatibility And Fitment

Compatibility is code‑driven. Check the unit’s printed/reference numbers against the vehicle’s required part numbers before installation. This BSI is commonly fitted to first‑generation Peugeot 3008/5008 and selected Citroën C4 Picasso and C5 variants; however, exact fitment depends on model year and equipment level.

Final Advice

Replace BSI units in a workshop environment with proper diagnostic equipment. If you plan to clone or code the module yourself, ensure you have experience with PSA tools and follow ESD and safety precautions to protect electronic components.

Typically located inside the cabin, replacing the BSI unit requires careful disconnection of the vehicle’s battery and removal of the dashboard panels for access. Professional handling or experienced DIY work is recommended to avoid electronic faults. Over time, BSI units may fail due to internal electronic component wear or exposure to voltage spikes, leading to symptoms such as malfunctioning central locking, dashboard warning lights, or unresponsive switches.

Technical Information

• Manufacturer: Johnson Controls
• Model: BSI04EV K04-00
• Compatible Vehicles: Citroën C8 (2009) and select Peugeot models
• Product Codes: 9664059080, 6580ZE, 6580SA
• Additional Numbers: 28119248-3C, 28120836-4

Ensuring the correct part number compatibility is crucial before purchasing. This BSI module helps restore complete electronic comfort system functionality, supporting both professional auto mechanics and car enthusiasts who perform their own repairs.

The BSI (Built-in System Interface) is integral for the functionality of various electrical components within the vehicle, such as lighting, climate control, and security systems. It can often fail due to factors such as electrical shorts, water ingress, or general wear and tear, which necessitates replacement. Regular checks and timely replacement can help prevent electrical issues and maintain vehicle performance.

When replacing the BSI unit, it is essential to ensure that the new unit is compatible with the specific model of the vehicle, and professional installation is recommended to avoid complications during connection and configuration.

Technical Information

• Manufacturer: Johnson Controls
• Model: BSI04EV K04-00
• Product Codes: 9664059080
• Additional Numbers: 1663370680, 657062, 657063, 28119248-3C, 28120836-4

This BSI (Body System Interface) unit is a direct-match electrical control module commonly referenced by part numbers 9664059180 / 966405918001 and K05-00. Intended for professional garages and experienced DIY mechanics working on Citroën and Peugeot vehicles, this unit manages central comfort and security functions and is often searched for by its OEM codes (e.g. 9664059180). Clear listing of original codes makes fast identification and ordering simple when replacing a faulty comfort module.

Technical Information

• Manufacturer: Johnson Controls
• Model: BSI04EV K05-00
• Product Codes: 9664059180, 966405918001, K05-00
• Other Numbers: 6580RN, 6580RP, 1663372780, 28119249-6D, 28120836-4

Compatibility

Common fitment includes Citroën C4 and Peugeot 308 (verify exact code match before installation). Always compare the unit’s printed or stamped numbers with the vehicle’s existing module to ensure compatibility.

Function

The BSI (Body System Interface) coordinates multiple comfort and convenience systems: central locking, interior and exterior lighting logic, wiper control, interior electronics power distribution, key recognition/immobiliser interface and communication with other CAN-bus modules. A correctly programmed BSI ensures proper behaviour of remote locking, alarm, interior lights, and certain comfort functions.

Installation

General replacement steps: disconnect the negative battery terminal, remove the trim panels to access the BSI, unplug wiring harness connectors, unbolt the unit and swap with the replacement. Reconnect connectors securely, refit trim and reconnect the battery. After mechanical replacement, the unit usually requires cloning or coding to match the vehicle’s immobiliser and keys (see coding section).

Installation And Coding – Important

• The unit is used and is “paired” to the original vehicle (VIN/PIN/keys).
• Options to make the unit operational:
  1. Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
  2. Virginisation and subsequent initialization/telecoding via DiagBox (or online) + key adaptation.
• Recommended to be performed by a specialist with PSA service equipment (DiagBox/Lexia/PP2000).
• Always disconnect the battery before removal/installation and follow the manufacturer’s procedures to avoid damaging the unit.

Recommendations For Installation

Work should be carried out with basic diagnostic capability and an oscilloscope or multimeter to verify power and CAN-bus signals where possible. Protect connectors from contamination, ensure all pins are straight and clean before reconnection, and avoid switching the battery on while connectors are unplugged. If you are cloning or coding, use official PSA tools (DiagBox/Lexia) or a qualified service to perform EEPROM/flash operations.

Why The Part Fails Most Often

• Water ingress or moisture leading to corrosion of connectors or internal electronics.
• Electrical surges or poor battery jump-starts causing internal component failure.
• Connector corrosion or broken solder joints from vibration and age.
• Software corruption after improper battery disconnection or failed coding attempts.

Technical buyers: check all listed OEM numbers (9664059180, 966405918001, K05-00) against the unit being replaced. Matching product and other reference numbers ensures correct fit and reduces rework. This listing includes the common reference and additional factory numbers to help identify the correct BSI for your Citroën or Peugeot.

Product Overview

The BSI04EV comfort control unit (BSI) K04-00 manufactured by Johnson Controls is a central body electronics module for Citroën C4 Picasso. It controls and coordinates comfort and convenience functions such as central locking, interior and exterior lighting, wipers, automatic windows, alarm/immobilizer interfaces and CAN communication between vehicle electronic modules. This unit is commonly searched by product codes (for example 9664059080, 1663370780 or K04-00), so listing the correct code helps you find the right replacement quickly.

Technical Information

• Manufacturer: Johnson Controls
• Model: Citroën C4 Picasso
• Product Codes: BSI04EV; K04-00; 9664059080; 9664059080 01; 657064
• Other Numbers: 1663370780; 28119248-3; 28120836-4; BOOT 28120836-4; HARD 28119248-3 C

Function And Typical Symptoms

The BSI is the vehicle’s comfort gateway. It routes CAN messages, manages user inputs (switches, remote keys), supplies power to convenience circuits and interfaces with the immobilizer and instrument cluster. Common symptoms of a faulty BSI include intermittent central locking, non-functioning interior lights, erratic wiper behaviour, failure to respond to key fob, dashboard warning lights or complete loss of some comfort functions.

Replacement Procedure

Replacement should follow a careful, step-by-step approach: disconnect the battery, remove trim panels or the glovebox to access the unit, document and label connector positions, unfasten mounting screws, unplug connectors and extract the module. When installing the replacement reverse the steps, ensure all connectors are fully seated and mount the unit securely. After mechanical installation, the unit usually requires data transfer or coding to match the vehicle’s immobilizer and network configuration.

Installation And Coding – Important

• The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
• Options For Commissioning:
1. Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
2. Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
• Recommended To Be Performed By A Professional With PSA Service Equipment (DiagBox/Lexia/PP2000).
• Before Removal/Installation Always Disconnect The Battery And Follow The Manufacturer’s Procedure To Avoid Damaging The Unit.

Recommendations For Installation

• Always Disconnect The Negative Battery Terminal Before Starting Work.
• Label Connectors And Take Photos To Ensure Correct Reassembly.
• Avoid Static Discharge When Handling The Module; Use ESD Precautions If Possible.
• Verify Battery Voltage Is Stable During Coding; Low Voltage Can Corrupt Module Memory.
• Use Official PSA Diagnostic Tools For Coding Or Cloning To Ensure Full Functionality.
• Check Related Fuses, Grounds And Connectors For Corrosion Before Replacing The Module.

Why This Part Most Often Fails

• Moisture Ingress Or Corrosion Causing Short Circuits Or Connector Failures.
• Voltage Spikes, Poor Jump-Start Procedures Or Faulty Charging Systems Leading To Electronic Damage.
• Age-Related Component Degradation, Cold Solder Joints Or Thermal Stress.
• Poor Previous Repairs Or Aftermarket Modifications That Overload Circuits.

Who Should Fit This Part

This BSI unit is intended for professional workshops and experienced DIYers who have access to appropriate diagnostic tools. Because successful commissioning typically requires cloning or telecoding, workshops equipped with PSA service software will achieve the fastest and most reliable result.

Notes For Buyers

Search By Product Code: Buyers often find the correct replacement fastest by searching the exact part number(s) shown in the technical information. Ensure you match the BSI hardware and software variant (BSI04EV K04-00) to your vehicle’s requirements before installation.

As a critical electronic component, the BSI unit is responsible for various functions such as controlling the car’s climate system, lighting, and other electronic conveniences. Over time, wear and tear, as well as electrical issues, can lead to failures in these systems, making the BSI unit prone to malfunctions. Regular checks and timely replacements are recommended to maintain optimal vehicle performance.

Technical Information

• Manufacturer: Johnson Controls
• Model: BSI04EV K04-00
• Product Codes: 9664059080, 6580NP, 657062, 6580NQ
• Other Numbers: 966405908001

It’s important to replace the BSI unit if you experience issues such as malfunctioning electronic components or warning lights on your dashboard. For mechanics and DIY enthusiasts, replacing this unit is straightforward but may require specific tools and diagnostic equipment to ensure compatibility and correct installation.