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.

Are you looking for a reliable auto part for your Citroën or Peugeot vehicle? Our offering of a used ECU from leading manufacturer Bosch is an optimal solution for your needs. This crucial component of electronic engine control has been carefully selected to meet your quality and durability requirements. It is designed for vehicles such as PEUGEOT 107 and CITROEN C1 with robotic transmission and EURO 5 standard, ensuring its functionality and efficiency according to your vehicle’s specifications.

Effective engine management is key to optimizing performance and reducing emissions. This engine control unit (ECU) is essential for managing several functions of your car, including fuel injection, chokes, and other critical engine parameters. Therefore, its reliability and accuracy are of utmost importance.

Technical Information:
Manufacturer: Bosch
Model: Citroën C1, Peugeot 107
Product Codes: 0261208702, 89661-0H230
Additional Numbers: B000727680

This engine control unit is ideal for those seeking a quality replacement part without investing in a completely new component while still maintaining the original performance and emission standards of their vehicle. We recommend consulting a professional mechanic for installation and maintenance to ensure proper functionality and safety in operation.

Don’t hesitate to improve your vehicle’s performance with this quality and verified auto part that we offer at the highest standards. With adequate maintenance and proper usage, this part will provide long-term reliable service.

The Citroën C1 and Peugeot 107 are mini cars that were produced from 2005 to 2022.

The production of the Citroën C1 and Peugeot 107 first series took place between 06/2005 – 02/2009; the first facelift from 02/2009 – 2012, and the second facelift from 2012 – 2014.
The second series was produced from 2014 – 2022.

When placing an order, you have the option to provide your VIN number, and we will check the part’s compatibility with your vehicle.

How to Replace the Engine Control Unit?

The unit is located on three screws to the left behind the engine and can be easily diagnosed and transferred to another vehicle.

Manufacturer: BOSCH

Robert Bosch GmbH operates in four business sectors: mobility (hardware and software), consumer goods (including home appliances and power tools), industrial technology, and energy and building technology.

Additional Codes
27060-0Q020 27060-0Q021 27060-0Q130 5702J2 5702L1 5705KJ 5705NP

Technical Information

• Manufacturer: Bosch
• Model: Citroën C1, Peugeot 107
• Product Codes: 0261208702, 89661-0H023
• Additional Numbers: 27060-0Q020, 27060-0Q021, 27060-0Q130, 5702J2, 5702L1, 5705KJ, 5705NP

Engine control units are critical components in modern vehicles, and they commonly fail due to factors such as electrical surges, overheating, or software glitches. Regular inspection and timely replacement can prevent engine performance issues and prolong the life of your vehicle. This Bosch ECU comes with a straightforward installation process, making it suitable for both professional mechanics and self-repair enthusiasts.

Technical Information

• Manufacturer: Bosch
• Model: 1.0i 1KR
• Product Codes: 0261208702
• Other Numbers: 89661-0H023

Don’t compromise on quality—choose the Bosch ECU for reliable engine management and performance enhancement.

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

Replacing an ECU typically involves removing the old unit, which can be accessed by disassembling certain engine components. It is recommended to replace the ECU when experiencing issues such as poor engine performance, irregular idling, or warning lights on the dashboard. The lifespan of an ECU can vary, but exposure to heat and moisture often leads to failure.

Technical Information:

• Manufacturer: Bosch
• Model: 1KR
• Product Codes: 0261208702
• Additional Numbers: 89661-0H020