Description
Immobilizer unit, 2x keys with transponder chip – aftermarket, engine control unit 89661-0H070 0261S04464, ignition barrel 4162FK. All matched together from one vehicle. Originated from a Citroën C1 (2009).
Product Overview
This set is a ready-to-fit combination of immobilizer unit, engine control unit (ECU), ignition barrel and two transponder keys sourced from a single Citroën C1 (2009). It is ideal for professional workshops and competent DIY mechanics looking to replace a failed immobilizer system or ECU on Citroën C1 and Peugeot 107 cars with the 1.0 1KR Euro 4 engine family. Having components already paired in one vehicle reduces the number of programming steps compared with random parts, saving time during installation.
How It Works
The immobilizer prevents unauthorized engine starts by requiring a correctly coded transponder key. The ECU (engine control unit) manages fuel injection, ignition timing and engine sensors; combined with the immobilizer, it ensures the vehicle starts only when the correct security data is present. The ignition barrel (switch) provides the mechanical and electrical interface for the key and starter circuit.
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, 0261S04464, 89661-0H070, 6580V7, 6252P3, 1943FE, 4162FK
- Additional Numbers: ECU 89661-0H070 / 0261S04464; Ignition Barrel 4162FK
Installation Recommendations
Before starting work always disconnect the battery and follow the vehicle manufacturer’s instructions to avoid damage to electronic units. Replace components with the ignition off and ensure that connectors are clean and pins are undamaged. When fitting the set, verify physical compatibility with the vehicle mounting points and harness connectors.
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 PSA service technician with diagnostic equipment (DiagBox/Lexia/PP2000).
– Before removal/installation always disconnect the battery and follow the manufacturer’s procedure to avoid damaging the unit.
How Replacement Is Performed
Typical replacement steps: disconnect the battery, remove trim and steering column covers to access the ignition barrel and immobilizer, unplug harnesses from the ECU and immobilizer, swap units, then perform cloning or reprogramming as required. If cloning is used, EEPROM/Flash data from the original ECU/immobilizer are transferred to the replacement unit to restore full functionality. If virginizing, the new unit must be initialized and telecoded to the vehicle and keys must be adapted.
Common Reasons For Failure
- Key or transponder chip damage: worn or mechanically damaged keys can fail to communicate with the immobilizer.
- Ignition barrel wear: mechanical wear causes poor contact or key recognition problems.
- Electrical faults: corrosion, moisture ingress or poor grounding can damage connectors or cause ECU malfunctions.
- Voltage spikes or battery faults: irregular supply can damage electronic circuits in the ECU or immobilizer.
- Software/data mismatch after replacement: units not cloned or coded will prevent vehicle start until correctly programmed.
Who Should Fit This
Suitable for experienced DIY mechanics and professional workshops. Because programming or cloning is typically required, we recommend having access to PSA diagnostic equipment (DiagBox/Lexia/PP2000) or using a qualified technician for the coding steps to ensure reliable commissioning.
Why Choose This Unit
Buying a matched set from one vehicle reduces the complexity of pairing separate components and can shorten workshop time. The kit includes both keys with transponder chips, which simplifies restoration of normal operation compared with replacing only mechanical parts.
