Description
Overview
The Bosch ME7.4.4 Engine Control Unit (ECU) is a core electronic module that manages fuel injection, ignition timing and engine management functions on a range of PSA vehicles. This unit is referenced under several part numbers often used in Citroën and Peugeot applications, making it a common replacement part for professional workshops and experienced DIY mechanics.
Key Features
- Bosch ME7.4.4 electronic engine management platform.
- Compatible with PSA petrol engine control strategies.
- Multiple cross-reference part numbers for easier identification.
- Designed for reliable control of injection, ignition and sensor processing.
Function And Common Symptoms
The ECU controls fuel delivery, ignition timing, idle control and communicates with sensors and actuators across the engine management system. When the ECU malfunctions, common symptoms include: engine starting problems or no-start condition, irregular or rough idle, stalling, poor acceleration, illuminated check engine light and diagnostic trouble codes stored in the control unit.
Why ECUs Fail
Failures can result from water ingress, corrosion on connector pins, electrical surges, thermal stress, or internal component degradation over time. Environmental exposure and wiring faults are frequent contributing factors. There is no fixed replacement interval; lifespan depends on vehicle use and conditions.
Replacement And Installation Guidance
Replacement requires careful handling and some technical steps. Typical procedure:
- Disconnect the vehicle battery before any work to avoid electrical damage.
- Locate the ECU according to the vehicle service manual and remove protective covers if fitted.
- Unplug wiring harness connectors and remove any mounting fasteners.
- Install the replacement unit, reconnect all connectors and restore battery power.
- Important: Many PSA ECUs require immobiliser pairing and software coding/calibration after fitment. Use appropriate diagnostic equipment (dealer-level or professional aftermarket tools) to program keys and adapt engine parameters. Have a qualified technician perform coding if you are not equipped.
Compatibility And Fitment Notes
This Bosch ME7.4.4 ECU is commonly found in PSA Group vehicles and is listed against several product numbers. Always verify compatibility using your VIN, original part number or vehicle application list before ordering. Cross-reference numbers appear below.
Technical Information
- Manufacturer: Bosch
- Model: ME7.4.4
- Product Codes: 0261207858, 9656982980
- Other Numbers: 9649314580, 9646992680, 1942QF
Suitable Vehicles
Typical fitment includes PSA Citroen and Peugeot models such as Citroen C2 and C3. Compatibility varies by engine and production year; confirm fitment by cross-referencing the part numbers above with your vehicle documentation.
Buyers Advice
Intended For: Professional Automechanics And Competent DIYers. Verify the part numbers against your vehicle and be prepared for immobiliser reprogramming or ECU coding after installation. If in doubt, contact a qualified technician or authorized service for guidance.
