Description
Engine Control Unit BOSCH ME7.4.4 NFU. Fits PEUGEOT 307 1.6 16V NFU 80 kW.
This Bosch ME7.4.4 ECU (Electronic Control Unit) is the original engine management unit used on PSA NFU 1.6 16V engines. It controls fuel injection, ignition timing, idle regulation, lambda sensor feedback and emission-related functions to ensure correct engine performance and drivability. The unit is commonly identified by part numbers 0261207474 and 9643840680 and is fitted to various vehicles within the Stellantis group, most notably the Peugeot 307 1.6 16V NFU. Mechanics and experienced DIYers frequently search for this part by its product codes, so the listed numbers below will help you find the exact match.
Technical Information
- Manufacturer: Bosch
- Model: ME7.4.4 NFU
- Product Codes: 0261207474, 9643840680, d00
- Other Numbers: 1942E4, 1940V8, NFP
Compatible Models
Designed for Peugeot 307 with the 1.6 16V NFU (80 kW) engine. Also fits other PSA/ Stellantis vehicles equipped with the NFU engine variant where the above part numbers match.
How It Is Replaced
- Safety First: Disconnect the negative battery terminal and wait a few minutes to discharge capacitors and protect vehicle electronics.
- Access: Locate the ECU — on many models it is mounted in the engine bay under protective covers (often under or near the battery) or behind an interior trim panel depending on model year.
- Disconnect: Remove any protective covers, unplug wiring harness connectors (press locking tabs), and unbolt the ECU from its bracket.
- Swap: Fit the replacement ECU, secure mounting bolts and reconnect all connectors carefully, ensuring pins and seals are intact.
- Programming: After installation use a suitable diagnostic tool to read/clear fault codes and perform required ECU coding or immobilizer/key synchronization. Some vehicles will require dealer-level or specialist diagnostic equipment (e.g., Peugeot/ Citroën diagnostic tools) for full adaptation.
- Check: Start the engine, confirm idle and drivability, and check for stored fault codes or limp-home mode.
Installation Recommendations
- Handle the ECU as an ESD-sensitive device—avoid touching connector pins and do not place the unit on conductive surfaces.
- Ensure the vehicle battery is fully charged and stable during programming to avoid corruption of ECU software.
- Inspect and, if necessary, repair the wiring harness and connector seals before fitting a new ECU—poor connections are a common cause of repeat faults.
- Replace any damaged gaskets or protective covers to prevent moisture ingress.
- If immobilizer or key coding is required, plan for the appropriate diagnostic equipment or professional service to avoid immobilization.
Why This Part Fails
ECUs are robust and generally have a long service life, but failures do occur. The most common causes are:
- Water Ingress And Corrosion: Moisture entering the connector or housing causes short circuits and connector corrosion.
- Electrical Surges: Faulty alternator, poor jump-start procedures or short circuits can damage internal electronics.
- Thermal Stress: Repeated overheating or poor ventilation can degrade internal components or solder joints.
- Connector Damage And Wiring Faults: Bent pins, loose contacts or damaged insulation lead to intermittent faults and ECU malfunction.
- Software Corruption: Interrupted programming or failed updates may require re-flashing or replacement.
Practical Notes For Mechanics And DIYers
When sourcing a replacement, verify the part numbers on the unit and the vehicle. Search by OEM codes 0261207474 and 9643840680 for the best match. Expect that the ECU may need coding to the vehicle’s immobilizer system and engine parameters; plan to use a compatible diagnostic tool or professional programming service if required. Proper diagnosis of the root cause (wiring, sensors, alternator) before replacing the ECU will often save time and prevent repeated failures.
