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!

This original BSI (Body Systems Interface) unit is designed specifically for the 2008 Citroën C4 Grand Picasso. Manufactured by Johnson Controls, this module with product code 9664059080 02 plays a crucial role in managing your vehicle’s electronic functions.

The BSI unit controls multiple systems such as lighting, vehicle security, energy management, and much more. It ensures smooth communication between various electronic subsystems, making it indispensable for proper vehicle operation. Over time, BSI units may degrade or fail due to electrical failures or moisture intrusion, causing issues like warning lights, malfunctions in central locking, or lighting errors.

Replacing the BSI unit is a straightforward process, typically completed within a few hours by professionals or experienced DIY mechanics. This unit includes all necessary connectors and functions to seamlessly integrate with your vehicle’s electronic network.

Choosing this genuine part guarantees excellent compatibility and performance, often at a more attractive price point compared to new units. Using an original component also supports a more sustainable repair approach by reducing waste.

Whether you are a professional auto mechanic or an enthusiastic car owner conducting self-repairs, this BSI unit is tailored to restore and enhance your Citroën C4 Grand Picasso’s functionality and reliability.

Technical Information

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

Restore your vehicle’s electronic systems efficiently with this BSI module, ensuring safety, comfort, and smooth operations on the road.

The BSI04EV K04-00 unit by Johnson Controls is a vital automotive component designed specifically for Citroën and Peugeot vehicles, particularly the 2008 Citroën C4 Grand Picasso. This Body System Interface (BSI) unit manages essential electronic functions such as central locking, electric windows, and various comfort systems, ensuring smooth and secure operation of your vehicle’s electronic features.

As a critical part of your car’s electronic network, the BSI unit coordinates communication between different modules, helping to maintain the overall functionality and safety of your vehicle. Failure of the BSI unit can result in malfunctioning locks, window controls, and other electronic components, making timely replacement essential for maintaining comfort and security.

Installation and Maintenance

Replacing the BSI04EV K04-00 requires careful disconnection of the old unit from the vehicle’s wiring harness, followed by installation of the new unit and proper programming to ensure compatibility with your specific car model. It is recommended that installation be carried out by professional mechanics or experienced DIYers familiar with Citroën and Peugeot electrical systems. Regular diagnostic checks can help detect early signs of failure such as irregular locking operation or intermittent electrical faults.

Typically, BSI units may deteriorate over years due to moisture ingress or electrical surges, so ensuring adequate care and proper installation protects your vehicle from unexpected electronic failures.

Technical Information

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

This BSI unit meets the required standards to ensure long-lasting reliability and perfect fitment, making it a smart investment for mechanics and car enthusiasts maintaining Citroën or Peugeot vehicles.

Why Choose This BSI Unit?

By choosing this BSI04EV K04-00 unit, you ensure the restoration of critical electronic systems in your Citroën C4 Grand Picasso. This enhances driving safety and convenience by reinstating reliable central locking and other comfort features. Don’t compromise on quality; select a proven part designed by Johnson Controls to keep your vehicle running smoothly and securely.

Frequent issues with the BSI module can arise from electrical faults, moisture exposure, or wear over time, leading to potential malfunctions in vehicle functionality. Therefore, regular diagnostics are recommended to ensure optimal performance and longevity of the module.

Installation of the BSI module involves accessing the vehicle’s central electronic unit, typically located under the dashboard. It is advisable to follow specific vehicle service manuals to ensure proper fitting and to avoid connectors damage.

Technical Information

• Manufacturer: Johnson Controls
• Model: BSI04EV K04-00
• Product Codes: 9678477180, 1613316380, 1663366080
• Additional Numbers: 28120836-4, 28119248-3C

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.

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.