Description
Overview
The Bosch ECU ME7.4.4 (part numbers 0261207858, 9649314580, 9646992680, 1942QF) is designed for PSA vehicles, primarily Citroën C2 and Citroën C3. This used engine control unit manages fuel injection, ignition timing and overall engine management to optimize performance and emissions.
Who Is This For
Ideal for professional auto technicians and experienced DIYers looking for a reliable replacement ECU. Often searched by part number, this unit is compatible with PSA applications and is a cost-effective option to restore engine operation.
Key Functions
- Controls fuel injection and ignition mapping
- Monitors and adjusts air-fuel ratio for efficient combustion
- Interfaces with sensors and actuators for emission control
- Manages idle regulation and diagnostic fault codes (OBD)
Replacement And Installation
Replacement can be a direct physical swap on many C2/C3 models. Prior to removal disconnect the vehicle battery, note the ECU mounting location and connector orientation. After installation, verify engine starts and runs. Be aware that some vehicles require immobiliser pairing or dealer-level programming to match the ECU with the vehicle’s anti-theft system and VIN. If uncertain, consult a service manual or a qualified technician.
Common Failure Modes And Maintenance Tips
- Moisture ingress and corrosion of connectors
- Heat-related component failure or solder joint cracks
- Voltage spikes from electrical faults or bad alternators
- Sensor faults that can mimic ECU failure—always diagnose comprehensively
Regular electrical system checks and keeping connectors dry prolong ECU life. Replacing a faulty ECU early prevents drivability issues and potential engine damage.
Technical Information
- Manufacturer: Bosch
- Model: Citroën C2, Citroën C3
- Product Codes: 9649314580, 9646992680, 0261207858, 1942QF
- Other Numbers: 0261207858, 9649314580
If you need assistance confirming compatibility with your VIN or guidance on programming, contact our technical support. Purchasing a compatible ECU with the correct codes helps ensure a smooth replacement and reliable operation.
