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.

Original BSI unit (Body Systems Interface) Johnson Controls BSI04EV K04-00 for Citroën and Peugeot cars. This is a used part dismantled from a Peugeot 3008 (year 2009). Code match is essential – this version matches the 9664059080 and 6580VV numbers used in PSAs to identify specific BSI hardware/software.

The BSI is a central comfort/body control unit that communicates via the CAN bus and controls, among other things, central locking, immobilizer, blinkers, wipers, lighting, electric windows, direction and comfort functions, sometimes also communication with the instrument panel. In the case of a BSI fault, apparently unrelated faults may occur (e.g. non-functioning remote control, lights turning on by themselves, wipers failing, impossibility to start due to the immobilizer).

This BSI04EV K04-00 variant is typically found in the Peugeot 3008 I and 5008 I and some related Citroën/Peugeot models from the PSA concern. Always compare the nameplate numbers of your original unit (especially 9664059080 and 6580VV) before ordering – matching part number and version is key for compatibility.

Installation and replacement: The BSI is located in the interior near the fuse box (usually on the left under the dashboard on the driver’s side). Before disassembly, disconnect the battery and wait until the network “sleeps” (prevention of voltage peaks). After physical installation, it is necessary to pair the unit with the car – transfer the configuration and immobilizer (cloning data from the original BSI) or completely configure via PSA diagnostics (Lexia/PP2000/Diagbox). Without proper immo programming, the car will not start.

Common causes of BSI failures include moisture/interior leaks, power surges with a weak or disconnected battery, and cold connections. We recommend that you check the condition of the electrical connectors and installation and pay attention to the correct procedure for disconnecting and connecting the battery.

Follow the numbers on the label to make the right choice: if your original unit is marked BSI04EV K04-00 and code 9664059080, or PSA numbers 6580VV/6580VW/6570A0, this unit is probably a suitable replacement candidate. Always check that the connectors and indexes match.

Technical information

• Manufacturer: Johnson Controls
• Model: BSI04EV K04-00 (BSI – Body Systems Interface)
• Product codes: 9664059080, 6580VV
• Other numbers: 6580VW, 6570A0, BSI04EV, K04-00, 02

Note: This is a used original PSA Citroën/Peugeot part. Expert assembly and correct coding are essential for full functionality in a particular car.

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!

You are in the right place to purchase used auto parts for Citroën and Peugeot! This specific product, the BSI unit (Body System Interface), is an essential control element for the proper functioning of your vehicle’s electrical and electronic systems.

The use of this particular unit is for the Citroën C5 X7 model, manufactured from 2009 onwards. It is a part that often requires replacement due to wear or damage, highlighting the importance of its proper functioning for overall comfort and safety of the vehicle. BSI units ensure that various electronic components of the car, such as lighting, central locking, or audio systems, communicate correctly and without faults.

Technical Information:

• Manufacturer: Johnson Controls
• Model: Citroën C5 X7
• Product Codes: 9664059080, 02, 6580SS, 6580SV, 657062

This unit is not only practical, but thanks to its compatibility with certain versions of the Citroën C5 X7, you can be assured that installation will proceed smoothly and without complications. A suitable mechanic or advanced amateur with experience in automotive electrical installations should perform the replacement.

By purchasing this auto part, you gain quality that supports the functionality and safety of your vehicle. Remember, even used parts can provide excellent service, especially when sourced from a reliable provider and thoroughly inspected.

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.

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) module BSI04EV K04-00 originating from a Citroën C4 Picasso is a critical central control unit for comfort and body systems. Supplied as a used automotive electronic part, it is aimed at professional mechanics and competent DIY enthusiasts who prefer an efficient, cost-effective replacement by part number.

Function And Benefits

The BSI controls and coordinates multiple comfort and body electronics including central locking, interior and exterior lighting logic, power windows, alarm/immobiliser interfaces and various switch inputs. Replacing a faulty BSI can immediately restore erratic or lost functionality of these systems and avoid more invasive repairs.

Compatibility And Fitment

Primary fitment: Citroën C4 Picasso. The module is commonly referenced by the part numbers printed below; compatibility should always be confirmed against the vehicle VIN and the exact part number (9664059080 01). Some PSA Citroën & Peugeot models sharing the same BSI family may accept this unit—verify cross-references before installation.

Replacement And Installation Notes

Typical replacement steps (general guidance):

• Disconnect the vehicle battery before starting to avoid short circuits.
• Remove necessary trim panels in the dash or glovebox area to access the BSI housing.
• Unplug all connectors carefully, noting their positions; remove mounting fasteners and extract the old unit.
• Install the replacement BSI, reconnect connectors and reassemble trims.
• Re-connect the battery. In many vehicles, the replacement module will require diagnostic confirmation, coding or immobiliser synchronization using a PSA-compatible diagnostic tool to restore full functionality.

Estimated labour time: typically 0.5–1 hour depending on access and whether coding is required.

Common Failure Causes And Service Life

BSI failures are most often caused by moisture ingress, corrosion on connector pins, voltage spikes, thermal stress or aging electronic components. Symptoms include intermittent or permanent loss of central locking, inconsistent lighting behavior, or failure of powered windows. Regular inspection of connectors and protection against water exposure can prolong service life.

Technical Information

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

This unit has been made available for immediate installation. Always confirm compatibility by part number and, where required, plan for diagnostic coding or synchronization to the vehicle after fitting.

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.