This combined set is ideal for professional workshops and DIY mechanics who need a ready-matched immobilizer solution for Citroën C1 and Peugeot 107 with the 1.0 1KR Euro 4 engine. The package contains the vehicle’s immobilizer unit, engine control unit (ECU), ignition barrel and two transponder keys taken from the same donor car — reducing the amount of coding work compared with mismatched components. Customers often search by part numbers listed below, so the set is suitable when replacing a failed immobilizer system or replacing an ECU after electrical damage.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C1, Peugeot 107 (1.0 1KR, Euro 4) — Origin: Citroën C1 (2009)
• Product Codes: 89661-0H070, 0261S04464, 4162FK
• Other Numbers: 89780-0H020, 89780-0H021, 89740-0H010, 89740-0H011, 6580V7, 6252P3, 1943FE

What The Set Does

The immobilizer unit communicates with the transponder chips inside the keys to allow engine start. The Engine Control Unit (ECU) manages fuel injection, ignition timing and emission control; it will only allow the engine to crank and start when it receives the correct immobilizer authorization. The ignition barrel provides the mechanical switch function and houses the antenna/reader for the transponder key.

Replacement Procedure

Typical replacement steps for experienced technicians:

• Disconnect the battery before any work.
• Remove steering column covers to access ignition barrel and immobilizer module.
• Unplug electrical connectors and remove the ignition barrel and immobilizer module.
• Access and remove the ECU (usually located in the engine bay/passenger compartment depending on model).
• Install the donor units in reverse order; ensure connectors are clean and secure.
• Perform cloning or coding procedure (see Installation and Coding section below) to authorize keys and ECU with the immobilizer.

Common Failure Causes

• Corrosion or water ingress causing connector faults or internal damage to immobilizer or ECU.
• Electrical surges from jump-starts or charging faults damaging ECU electronics.
• Wear to the ignition barrel or key transponder failure due to mechanical damage.
• Intermittent faults caused by poor grounding or loose connectors.

Installation Recommendations

• Always Disconnect The Battery Before Removal/Installation To Prevent Damage And Avoid Airbag/ECU Faults.
• Inspect Connectors And Wiring For Corrosion, Clean Contacts, And Replace Damaged Clips Or Harnesses.
• Use Proper Diagnostic/Programming Equipment (DiagBox/Lexia/PP2000 Or Equivalent) For Coding And Key Learning.
• If Possible, Transfer Mounting Hardware And Connector Brackets From The Original Vehicle To Ensure Correct Fitment.
• After Installation, Clear Fault Codes And Perform A Full System Check: Immobilizer, Central Locking, Engine Start And Readiness Tests.

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. Virginization And Subsequent Initialization/Telecoding Via DiagBox (Possibly Online) + Key Adaptation.
• Recommended To Be Performed By A Technician 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.

Why Choose This Set

Buying the matched set from a single donor vehicle reduces compatibility issues between immobilizer, keys and ECU and can save significant time during commissioning. It is a practical option for garages and experienced DIYers who can perform cloning or professional coding. The set includes two keys with chips, which is useful when replacing a lost or damaged key pair.

Included In The Package

• Immobilizer Unit (matched)
• Engine Control Unit (89661-0H070 / 0261S04464)
• Ignition Barrel (4162FK)
• Two Transponder Keys

Suitable For Professionals And Competent DIY Mechanics Familiar With Immobilizer Coding And ECU Handling. Always Follow Safe Working Practices And Use Correct Diagnostic Tools For Final Commissioning.

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 delivery contains an immobilizer unit with remote control and one transponder key, together with the matched engine control module. All items were removed as a matched set from a Peugeot 107 (2007), ensuring correct pairing of immobilizer, remote and ECU.

Function And Benefits

The immobilizer prevents engine start unless a programmed transponder key is present. The included remote provides central locking and remote unlock convenience. Supplying the immobilizer together with the matched ECU and key reduces programming complexity and helps restore full vehicle security and convenience.

Installation And Programming

Replacement requires basic mechanical access and a diagnostic/programming step. Typical procedure: disconnect the battery, remove interior trim to access the immobilizer/ECU location, fit the new unit and secure connections. Final step: program the transponder key and sync the immobilizer with the ECU using a compatible PSA diagnostic tool such as DiagBox/Lexia or an aftermarket key programmer that supports PSA vehicles. Professional programming is recommended for reliable synchronization.

Common Failure Causes

Immobilizer systems and remotes can fail due to moisture ingress, corrosion, physical damage to the key or circuit board, wiring faults, battery issues in the remote, or electronic faults following collisions or voltage spikes. Replacing both the immobilizer and related ECU/key as a matched set avoids many diagnostic pitfalls.

Technical Information

• Manufacturer: PSA (Peugeot Citroën)
• Model: Citroën C1; Peugeot 107
• Product Codes: 6580V7, 6545PR, 6252P3
• Other Numbers: 89780-0H020, 89740-0H010-00

Origin: Removed from Peugeot 107 (2007). All parts are supplied as they were removed from the donor vehicle and are matched together.

If you are a professional mechanic or an experienced DIYer, this matched immobilizer set is a practical replacement option. Always ensure proper programming and vehicle compatibility before installation.