Overview

This Bosch ME7.4.4 engine control unit (ECU) is designed for vehicles equipped with the NFU 1.6 16V engine, most notably the Peugeot 307 1.6 16V (80 kW). The unit manages fuel injection, ignition timing, lambda control, idle regulation and many engine protection strategies. Technically advanced and commonly searched by part number, this ECU is a direct-fit electronic control module for compatible PSA/Stellantis powertrains.

Function And Typical Symptoms

The ECU continuously monitors and controls engine sensors and actuators: injectors, ignition coils, throttle body, cam/crank sensors, oxygen sensors and EGR/boost-related systems where fitted. When an ECU develops faults the vehicle can exhibit one or more of the following symptoms: engine fails to start, irregular idle, misfires, reduced power / limp mode, increased fuel consumption, or persistent fault codes and MIL (Check Engine Light).

Compatibility And Fitment

Fits: Peugeot 307 1.6 16V with engine code NFU, rated approximately 80 kW. Commonly referenced by Bosch and PSA numbers listed below. Ensure engine code matches vehicle specification before installation.

Technical Information

• Manufacturer: Bosch
• Model: Peugeot 307 1.6 16V (Engine Code NFU) 80 kW
• Product Codes: 0261207474, 9650346080
• Other Numbers: ME7.4.4, 1942E4, 1940V8

Installation And Coding – Important

– The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
– Options For Commissioning:
1) Cloning Data From The Old Unit (EEPROM/Flash) – After A Clone The Unit Is Plug And Play.
2) Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
– Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
– Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damaging The Unit.

Recommendation For Installation

• Disconnect the negative battery terminal and wait a few minutes before starting work to avoid electrical damage.
• Work in a static-free environment; avoid touching exposed pins and circuit board areas.
• Inspect connectors and wiring for corrosion or damage; repair wiring faults before fitting the ECU.
• After mechanical fitment, perform cloning or coding with appropriate diagnostic equipment (DiagBox/Lexia/PP2000). If cloning is performed correctly, the ECU will operate without further immobilizer issues.
• Follow vehicle manufacturer torque and mounting instructions to ensure reliable grounding and heat dissipation.

Why This Part Typically Fails

Common causes of ECU failure include water ingress or condensation (corrosion of connectors or PCB), thermal cycling causing solder joint cracks, voltage spikes from charging system faults or jump-starts, and prolonged exposure to contaminated environments. In many cases faults are secondary to wiring harness damage or failing sensors/actuators that place abnormal load on the ECU.

Replacement Procedure (Summary)

1. Disconnect negative battery terminal and secure vehicle.
2. Locate the ECU (consult vehicle repair manual); remove surrounding trim or brackets as needed.
3. Unplug electrical connectors carefully and remove mounting bolts.
4. Install replacement ECU, secure bolts and reconnect all plugs.
5. Perform cloning or virginization and coding with DiagBox/Lexia/PP2000 as required, then test engine functions and clear fault codes.

Search Tips

This unit is frequently searched by part numbers: 0261207474, 9650346080 and by control unit type ME7.4.4. Use engine code NFU and vehicle model (Peugeot 307 1.6 16V) when checking compatibility.

Product Overview

This Bosch ME7.4.4 engine control unit (ECU) is designed for the Peugeot 307 1.6 16V with engine code NFU (80 kW). Supplied under references 0261207474 and 9643840680, this ECU manages core engine functions such as fuel injection timing, ignition, idle control and onboard diagnostics (OBD). It is a direct-fit replacement for vehicles equipped with the ME7.4.4 platform and is commonly searched by part numbers ME7.4.4, 0261207474 and 9643840680.

Why This Unit Matters

The ECU is the central element of modern engine management. It interprets sensor signals (airflow, throttle position, engine speed, temperature, oxygen sensors) and controls fuel injectors, ignition timing and other actuators to optimize performance, emissions and fuel economy. A faulty ECU can cause poor running, misfires, stalling, limp-home mode, increased fuel consumption or inability to start.

How Failures Typically Occur

• Moisture Ingress And Corrosion: Water or condensation reaching connectors or the housing can corrode pins and printed circuit traces.
• Thermal Stress And Solder Joint Fatigue: Heat cycles can create micro-cracks in solder joints, leading to intermittent or permanent failures.
• Electrical Surges Or Poor Grounding: Voltage spikes, jump-starting errors or bad earth connections can damage internal components.
• Connector Wear Or Bent Pins: Mechanical damage during service or vibration can cause poor contact and communication errors.

Replacement And Installation

Typical replacement steps for experienced mechanics or competent DIYers:

• Disconnect The Battery: Always isolate the negative battery terminal before starting to avoid electrical damage.
• Access The Unit: The ECU is mounted in the vehicle (engine bay area). Remove any protective covers or brackets that secure the module.
• Unplug Electrical Connectors: Carefully release connector locks and remove multi-pin plugs without forcing or bending pins.
• Remove Mounting Fasteners: Unscrew bolts securing the ECU, then lift the unit out with care.
• Fit The Replacement: Position the new ECU, torque bolts to manufacturer values if available, reconnect connectors and reapply any seals or covers.
• Reconnect Battery And Commission: After mechanical fitment, follow coding/initialization steps if required (see Coding Section).

Do not open the ECU housing or attempt internal repairs if you are not qualified; moisture protection and internal calibration can be compromised.

Installation And Coding – Important

• The Unit Is Used And May Be Paired With The Original Vehicle (VIN/PIN/Keys).
• Options To Commission The Unit:
  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 Technician With PSA Service Equipment (DiagBox/Lexia/PP2000).
• Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damaging The Unit.

Technical Information

• Manufacturer: Bosch
• Model: Peugeot 307 1.6 16V NFU 80 kW
• Product Codes: 0261207474; 9643840680
• Other Numbers: 1942E4; 1940V8; 19420000; 261207474; ME7.4.4

Recommendations For Fitment

• Perform Installation In A Dry, Static-Free Environment.
• Check All Connector Pins For Corrosion Or Damage Before Reconnecting.
• Use Proper Diagnostic Tools To Confirm Software Version And To Clear Fault Codes After Fitment.
• If Cloning Is Performed, Ensure Complete EEPROM/Flash Transfer To Preserve Immobilizer And Engine Parameters.

Why You Should Choose This Unit

Replacement ECUs identified by OE numbers 0261207474 and 9643840680 are widely referenced in repair manuals and parts databases for Peugeot 307 NFU engines. Choosing the correct ME7.4.4 unit reduces troubleshooting time and restores engine control functionality quickly—important for workshops and DIY mechanics who need reliable, part-number-specific repairs.

Notes For Professionals

Searchable Keywords: Bosch ME7.4.4, 0261207474, 9643840680, Peugeot 307 NFU, ECU Replacement, Engine Control Unit. When ordering, match engine code NFU and part numbers to ensure compatibility.