Description
Bosch Engine Control Unit for Citroén C2 C3
High-quality Bosch ME7.4.4 engine control unit (ECU) compatible with Citroën C2 and C3 models. This unit is commonly searched by part numbers such as 0261207858 or 9649314580 and is designed for mechanics and experienced DIY enthusiasts looking for a direct replacement ECU. The ME7.4.4 platform controls fuel injection, ignition timing and emission systems to ensure smooth running, efficient fuel consumption and stable idle. Ideal for garages and independent technicians who need a reliable ECU replacement with known product codes for fast identification.
Technical Information
- Manufacturer: Bosch
- Model: Citroën C2, Citroën C3
- Product Codes: 0261207858, 9649314580
- Other Numbers: 9646992680, 1942QF, ME7.4.4
Installation Recommendations
Before any intervention always disconnect the battery and follow the vehicle manufacturer’s safety procedures. Mount the ECU in its original position and ensure connectors are clean and fully seated. Protect the unit from moisture and vibrations during reinstallation. Use proper torque on mounting bolts and avoid flexing the PCB or connectors while handling.
Installation and Coding – Important
The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
Options to put the unit into service:
- Cloning the data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
- Virginisation 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 damage to the unit.
Why This Part Most Often Fails
- Water ingress and moisture leading to corrosion of connectors or PCB traces.
- Thermal stress and repeated heating/cooling cycles causing solder joint cracks.
- Voltage spikes, poor grounding or battery jump-start incidents damaging internal electronics.
- Connector corrosion or pin damage from improper handling or poor sealing.
How Often It Fails
ECUs typically last many years when protected from moisture and electrical faults. Failures are more likely on higher-mileage vehicles or cars exposed to damp conditions, poor battery health or repeated electrical issues. There is no fixed service interval; replacement is usually driven by symptoms or diagnostic fault codes.
Typical Symptoms Indicating ECU Fault
- Engine does not start or intermittent starting problems.
- Misfires, rough idle or loss of power under load.
- Illuminated Check Engine Light and persistent fault codes related to injection, sensors or communication errors.
- Sudden drop in fuel economy or erratic idle speed control.
Part numbers listed above are commonly used when searching for a replacement ECU. Verify compatibility by matching the product codes printed on the original unit and follow correct cloning or coding procedures after installation to restore full vehicle functionality.
