This used BSI (Body System Interface) Siemens E01-00 is suitable for a range of Citroën and Peugeot models and is often searched by part numbers such as 9657999680, S118085320 or 1650882480. The unit manages multiple comfort and body functions and is a common replacement item for workshops and DIY mechanics maintaining Xsara Picasso, Berlingo, 206 and Partner vehicles. If you are troubleshooting intermittent electrics, central locking faults, or communication errors on the CAN bus, this BSI unit is a direct-replacement option for compatible vehicles and specified part codes listed below.

Technical Information

• Manufacturer: Siemens
• Model: BSI E01-00
• Product Codes: 9657999680, S118085320, E01-00
• Other Numbers: 1650882480, 1650882680, 650883080, 6580T5, 6580EZ, 6580EY, 6580GY

Function And Fitment

The BSI is the central comfort and body control unit that coordinates lighting, wipers, central locking, interior electronics, switch inputs and acts as a gateway on the vehicle CAN network. A malfunctioning BSI can produce a wide range of symptoms: failure of central locking, intermittent lights, non-working wipers, dashboard warning messages, or loss of certain communication lines between modules. This specific Siemens E01-00 variant is referenced for Citroën Xsara Picasso and Berlingo, and for Peugeot 206 and Partner in compatible configurations.

Replacement Procedure

Typical replacement steps for a competent mechanic or experienced DIYer:

• Disconnect the negative battery terminal before any work to avoid electrical damage.
• Access the BSI unit, normally located under the dashboard on the passenger side (behind the glovebox or lower trim) on the listed models.
• Remove surrounding trim and any retaining screws to free the unit.
• Carefully unplug all multi-pin connectors; note their positions and locking tabs.
• Install the replacement BSI, secure mounting screws and refit connectors ensuring full engagement.
• Proceed with the required coding or data transfer steps (see Installation and Coding – Important below) before reconnecting all systems and the battery.

Installation Recommendation

• Perform mounting and electrical work in a dry, well-lit area and use proper anti-static precautions.
• Verify connector pins and wiring harness condition before installation; corroded pins should be cleaned or replaced.
• After installation, check all controlled functions (lights, wipers, locks, dashboard messages) and perform a road test to confirm correct operation.

Installation and Coding – Important

– The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).

– Options To Bring The Unit Into Service:

1. Kloning 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 Technician With PSA Service Equipment (DiagBox/Lexia/PP2000).

– Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damaging The Unit.

Why This Part Fails Most Often

• Water Ingress And Humidity: Moisture entering the passenger footwell or dashboard area causes corrosion and short-circuits on the PCB or connectors.
• Electrical Surges Or Poor Grounding: Voltage spikes, jump-starting errors or bad grounds can damage internal components.
• Thermal Stress And Solder Joint Fatigue: Repeated heating and cooling cycles may cause cracked solder joints or component failures.
• Connector Corrosion And Wiring Damage: Corroded pins or damaged harnesses lead to intermittent faults and communication errors.

Symptoms To Watch For: Intermittent or permanent failure of central locking, erratic lighting, non-working wipers, dashboard communication errors, or immobilizer-related starting faults when coding/pairing is lost.

Order this Siemens BSI E01-00 if the listed part numbers match your vehicle’s unit and you require a replacement BSI for Citroën Xsara Picasso, Citroën Berlingo, Peugeot 206 or Peugeot Partner. Installation and proper coding/cloning are critical for full restoration of functionality.

Our part is compatible with several Citroën and Peugeot vehicle models, including popular types such as Citroën Xsara, Xsara Picasso, Berlingo, and Peugeot 307, Partner, and 206. With broad compatibility and the original design from Siemens, this ECU is a key component for the correct operation of electrical systems in vehicles.

Technical Information:
Manufacturer: Siemens
Model: Citroën Xsara, Xsara Picasso, Berlingo | Peugeot 307, Partner, 206
Product Codes: 9657999880, S118085120F, 1650882680
Other Numbers: 6580FQ, 6580EZ, 6580EY, 6580EJ, 1650882480

The ECU is essential for optimizing and coordinating various electronic functions in the vehicle, from engine management to comfort and safety systems. This part enhances the overall performance and efficiency of the vehicle, making its replacement crucial for maintaining a high level of operability.

If you are in the process of repairing or looking to maintain the functionality of your car, our Siemens BSI E03-00 part is the best choice for your Citroën or Peugeot vehicle. Remember that proper installation and compatibility are key to maximizing the performance of this part.

This Siemens BSI (Body System Interface) E02-00 is a direct-fit comfort/electrics control unit designed for a range of Citroën and Peugeot vehicles. Ideal for professional workshops and experienced DIY mechanics, the module controls functions such as central locking, interior lighting, windshield wipers, power windows, alarm and certain comfort features. The unit is commonly referenced by multiple OEM numbers (see Technical Information) and is frequently sought after by its part codes—entering these numbers in searches raises the chance of quick identification and purchase.

Installed correctly, this BSI restores reliable central electronics behaviour: eliminates intermittent dashboard warning lights, restores remote locking/unlocking, and fixes random failures of convenience systems. The product suits technicians who need a ready-to-fit unit that matches the electrical and mechanical connectors of the listed models. Typical symptoms that indicate a failing BSI include erratic instrument cluster behaviour, loss of remote central locking, malfunctioning electric windows, immobiliser or key recognition faults, and unexpected fuse blows.

Technical Information

• Manufacturer: Siemens
• Model: Citroën Xsara Picasso; Citroën Berlingo II; Peugeot 206; Peugeot Partner II
• Product Codes: 9657999780; S118085220; E02-00
• Other Numbers: 6580FF; 6580YZ; 1650883280; 1650882580; 6580EZ; 1612812380

Fitment And Replacement Procedure

Basic replacement steps for a qualified mechanic or competent DIY’er:

• Disconnect the negative battery terminal and wait a few minutes to ensure the vehicle electrics are discharged.
• Gain access to the BSI unit—typically located behind the dashboard or under the glovebox depending on model.
• Remove trim panels and unscrew the unit retaining bolts. Carefully unplug all multi-pin connectors, noting their positions.
• Install the replacement BSI, secure bolts, reconnect connectors and reassemble trim panels.
• Coding or cloning is required (see Mounting And Coding – Important). Do not reconnect the battery until ready to perform the required programming steps.

Mounting And Coding – Important

• The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
• Activation Options:
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 Manufacturer Procedures To Avoid Damage To The Unit.

Installation Recommendations

Always follow OEM procedures and safety precautions. Use dielectric grease on connector pins if appropriate, inspect connector locks and wiring for corrosion or damage, and replace any brittle wiring or broken clips during installation. Keep the unit and connectors dry; water ingress is a common cause of failure. If cloning, ensure a verified backup of EEPROM/Flash is made. If telecoding, ensure a stable connection and correct software version for the vehicle.

Why This Part Usually Fails

• Water Ingress And Corrosion: Moisture reaching connectors or the unit casing causes short circuits and corrosion of electrical contacts.
• Electrical Surges Or Poor Battery Connections: Voltage spikes or unstable charging systems can damage internal electronics.
• Thermal Stress And Ageing: Over years, solder joints and electronic components can crack or degrade, producing intermittent faults.
• Connector Wear And Mechanical Damage: Repeated connector cycling or improper handling during repairs can break pins or sockets.

Suitable For professional vehicle electrics technicians and competent DIY mechanics who understand the coding requirements for PSA systems. The listed product and reference numbers will help you find the correct unit for the vehicle. Replace and code the BSI correctly to restore full vehicle comfort and security functions.

Introducing the Siemens BSI E03-00 ECU, part number 9657989880, tailored for various Citroën and Peugeot models including Xsara, Xsara Picasso, Berlingo, Peugeot 307, Partner, and 206. This electronic control unit plays a critical role in managing various vehicle systems, ensuring optimal performance and efficiency.

The BSI (Built-in Systems Interface) is essential for communication between different electronic components in your vehicle, contributing to the comfort and functionality of features such as central locking, lighting systems, and more. Over time, issues may arise due to electrical failures or water ingress, making replacement necessary to maintain proper vehicle operation.

Installation of the Siemens BSI E03-00 ECU is straightforward and can typically be performed by experienced mechanics or DIY enthusiasts. It is important to ensure compatibility with your vehicle’s wiring and systems.

Technical Information

• Manufacturer: Siemens
• Model: BSI E03-00
• Product Codes: 9657989880, S118085120F, 6580EZ, 6580EY
• Additional Numbers: 6580EY, 6580EZ