Ideal for both professional mechanics and DIY car enthusiasts, this complete set replaces damaged or malfunctioning electrical components related to vehicle security and engine management. The immobilizer system prevents unauthorized engine start, while the chip-equipped key fobs allow secure access and vehicle operation. The ECU manages engine parameters to optimize performance and emissions.

Technical Information:
Manufacturer: Citroën / Peugeot
Model: Citroën C1 / Peugeot 107
Product Codes: 89661-0H022, 89740-0H010-00, 89780-0H020, 6580V7, 6252P3
Additional Numbers: N/A
Vehicle Type: 1.0 1KR EURO 4
Components Included: Immobilizer Unit, 2x Chip Key Fobs, Engine Control Unit
Condition: Used, fully functional, removed from a working vehicle

The complete set was removed from one vehicle to guarantee full compatibility and ease of installation. Regular inspection and maintenance of these parts help sustain optimum security and vehicle operation. For installation advice or troubleshooting, feel free to contact us. We prioritize your vehicle’s reliability and your safety on the road.

This used assembly pairs the immobilizer module, one transponder key fob and the engine ECU into a single matched set taken from the donor vehicle. It is ideal for mechanics and competent DIYers who need a ready-paired unit for Citroën C1 / Peugeot 107 platforms with the 1.0 1KR petrol Euro 4 engine. Because the parts were working together on the donor car (engine started), the set reduces time spent on part matching and troubleshooting; the only reported issue was the remote not locking, most likely due to a depleted key battery.

Key Features & Function

– Immobilizer Unit: Authorizes the correct transponder key before the ECU enables fuel and ignition circuits, preventing unauthorized engine start.
– Engine Control Unit (ECU): Manages fuel injection, ignition timing and engine sensors for the 1.0 1KR Euro 4 engine.
– Key Fob With Transponder Chip: Provides remote locking/unlocking (remote may require battery replacement) and contains the immobilizer transponder that must be recognized by the immobilizer unit.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C1 / Peugeot 107 (1.0 1KR, Euro 4)
• Product Codes: 89780-0H020, 89780-0H021, 89740-0H010, 89740-0H011, 0261208702, 89661-0H022
• Additional Numbers: 6580V7, 6252P3

Fitment And Compatibility

Designed for Citroën C1 and Peugeot 107 models equipped with the 1.0 1KR petrol engine (Euro 4). Originates from a 2007 Citroën C1. Ensure the listed product and additional numbers match the part you require before installation.

Installation 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 the manufacturer’s procedure to avoid damaging the unit.

Recommended Installation Notes

• Disconnect the negative battery terminal before starting work to prevent short circuits and protect electronic modules.
• Handle the ECU and immobilizer with anti-static precautions and avoid exposing connectors to moisture or dirt.
• Label connectors and routing during disassembly to ensure correct reconnection; secure connectors fully and avoid bent pins.
• After fitting, follow the coding/initialization route described above to ensure keys and immobilizer are properly synchronized with the ECU.

Typical Failure Causes

The most common reasons these systems fail or show symptoms are:

• Depleted Key Fob Battery: Remote locking/unlocking failure is often simply a flat battery in the key fob.
• Immobilizer Synchronization Loss: Electrical faults, battery disconnection or module replacement can desynchronize keys and immobilizer.
• Water Ingress / Corrosion: Moisture or corroded connectors can cause intermittent faults or permanent damage to modules.
• Electrical Surges / Starter Motor Issues: Voltage spikes or poor grounding can damage ECU electronics.
• Internal Module Fault: Capacitor failure or solder joint problems inside the ECU/immobilizer can lead to non-start conditions.

Why Choose This Set

This matched set saves time for workshops and experienced DIYers by delivering components already working together on the donor vehicle. Ideal when the engine runs but remote locking or key recognition is unreliable — often the fastest path back to a properly operating vehicle when combined with correct coding or cloning procedures.

What Is Included

• Immobilizer Unit
• Engine Control Unit (ECU)
• One Key Fob With Transponder Chip

Notes

Remote control issues are commonly resolved by replacing the key fob battery first. For full functionality (start authorization and remote features) follow the installation and coding instructions above. Use appropriate PSA diagnostic equipment for programming or cloning to ensure reliable operation.

This Bosch ECU is intended for the 1.0i 1KR engines used in the first-generation Peugeot 107 and Citroën C1 (Stellantis). It carries the manufacturer and OEM references frequently searched by mechanics and DIY enthusiasts: 0261208702 and 89661-0H022, plus additional identifiers 1939PE, 194367 and 194002. The unit controls fuel injection, ignition timing, idle control and input/output management for sensors and actuators, ensuring proper engine performance, drivability and emissions compliance when matched to the correct vehicle setup.

Compatibility And Applications

Designed for first-generation small city cars of the PSA/Toyota joint project. Typical applications include:

• Peugeot 107 (first generation)
• Citroën C1 (first generation)

Searchable product codes: 0261208702, 89661-0H022. These numbers are commonly used by workshops when locating the correct ECU for replacement or repair.

Technical Information

• Manufacturer: Bosch
• Model: For PEUGEOT 107 / CITROËN C1 (First Generation)
• Product Codes: 0261208702, 89661-0H022
• Other Numbers: 1939PE, 194367, 194002

Installation And Coding – Important

• The unit is used and is “paired” with 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. 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 disassembly/assembly always disconnect the battery and follow the manufacturer’s procedure to avoid damage to the unit.

Replacement Procedure – Practical Steps

• Prepare: Park on a level surface, engage handbrake and disconnect the negative battery terminal before starting.
• Access: Remove necessary trim or covers to reach the ECU mounting position. Location can vary by production date and specification; consult the vehicle repair manual if needed.
• Disconnect: Carefully unplug the multi-pin connectors and any grounding straps. Inspect connector pins and wiring for corrosion or damage.
• Remove/Install: Unbolt the ECU from its bracket, install the replacement and secure fasteners to the correct torque. Reconnect connectors firmly and route wiring to avoid chafing.
• Commissioning: Follow the installation and coding options above (cloning or virginization/telecoding) to restore full functionality and immobilizer alignment.

Why The Part Most Often Fails

• Water Ingress And Corrosion: Moisture or water leaks reaching the ECU or connectors causes corrosion and electrical faults.
• Voltage Spikes And Poor Battery Procedures: Jump-starting, battery disconnects without following correct procedures or faulty charging systems can damage internal electronics.
• Thermal Stress And Vibration: Long-term thermal cycling and vibration in the engine bay can lead to solder joint cracks or component degradation.
• Damaged Wiring Or Connectors: Short circuits, rodent damage or chafed harnesses often lead to ECU faults that manifest as drivability issues.

Maintenance And Practical Tips

• Always inspect connectors and wiring before and after ECU replacement; repairing harness faults prevents repeat failures.
• Use professional cloning or coding tools to avoid immobilizer and communication issues with engine components.
• Store and handle the unit in a clean, dry environment and avoid static discharge when working on the ECU.

This ECU is a direct way to restore correct engine control when replacing a failed unit, provided installation and coding are performed correctly. For workshops and experienced DIY mechanics, matching the part numbers (0261208702 / 89661-0H022) and following cloning or telecoding procedures will ensure the vehicle returns to reliable operation.

The ECU utilizes advanced technology to control the engine’s fuel injection and ignition timing, which helps optimize engine performance while minimizing emissions. A typical failure in these units can be due to overheating, electrical issues, or corrosion, making it crucial for vehicle owners and mechanics to monitor the ECU’s health.

Replacing the ECU involves disconnecting the vehicle’s battery, carefully removing the old unit without damaging connecting wires, and installing the new unit, which typically takes less than an hour for experienced mechanics. Regular inspection of the ECU should be part of automotive maintenance, especially for vehicles that show signs of poor performance or irregularities in fuel consumption.

Technical Information

• Manufacturer: Bosch
• Model: Peugeot 107, Citroën C1
• Product Codes: 0261208702
• Additional Numbers: 89661-0H022