This Bosch ME7.4.4 Engine Control Unit (ECU) is designed for vehicles equipped with the NFU 1.6 16V petrol engine and is commonly used on Peugeot 307 models. The unit manages fuel injection, ignition timing and engine diagnostics to ensure smooth running, efficient fuel consumption and compliance with emission control strategies. Ideal for professional garages and competent DIY mechanics who need an OE-compatible control unit identified by part numbers such as 0261207474 or 9650346080.

Technical Information

• Manufacturer: Bosch
• Model: ME7.4.4 NFU
• Product Codes: 0261207474, 261207474
• Additional Numbers: 9650346080, 1942E4, 1940V8, NFP, ME7.4.4

Compatibility And Application

Primarily fitted to Peugeot 307 1.6 16V with engine code NFU (80 kW). The same ECU platform can be found across related Stellantis petrol engines; always verify the engine code stamped on the engine or printed on the original ECU label when selecting a replacement.

Installation Recommendations

• Prepare: Park on a flat surface, switch off ignition and remove the key. Disconnect the negative battery terminal and allow the vehicle to sit for a few minutes to remove residual voltage.
• Access: Remove necessary trim and ECU cover to access the control unit. Handle connectors carefully—do not bend pins or force plugs.
• Replacement: Unbolt the ECU from its mount, unplug all electrical connectors and install the replacement unit in reverse order. Ensure connectors seat fully and locking tabs engage.
• Programming: After physical replacement the ECU will typically require software flashing/coding and immobilizer pairing or adaptation using appropriate diagnostic equipment. Reprogramming must be performed by a workshop with suitable Bosch/PSA tools or diagnostics capable of writing the correct firmware and immobilizer data.
• Safety: Observe electrostatic discharge (ESD) precautions. Avoid working in wet conditions and keep the ECU and connectors clean and dry.

Why This Part Commonly Fails

Engine control units are designed for long service life, but failures can occur due to external stresses rather than simple wear. The most frequent causes include water ingress or corrosion (from leaks or condensation), thermal cycling that stresses solder joints, voltage spikes from poor electrical connections or jump-starting, and damage from contaminated connectors. Faulty sensors, short circuits or persistent electrical faults elsewhere in the vehicle can also overload the ECU and lead to failure. Symptoms of a failing ME7.4.4 ECU include engine running irregularly, frequent limp-home mode, failure to start, random fault codes and poor fuel economy.

Why Choose This Unit

For mechanics seeking an ECU replacement that matches original Bosch specifications, this ME7.4.4 unit carries the familiar PSA part numbers and is suitable for workshops and experienced DIYers who can handle programming. Using the correct part number (e.g., 0261207474 / 9650346080) improves the chance of direct compatibility with the vehicle wiring and sensor set.

This Bosch ME7.4.4 Engine Control Unit (ECU) is designed for vehicles equipped with the 1.6 16V NFU engine, most commonly found in the Peugeot 307. The unit controls fuel injection, ignition timing, idle management and emission-related actuators to ensure smooth running, optimal fuel economy and correct lambda control. Commonly searched under part numbers such as 0261207474 or 9643840680, this ECU is a direct-fit replacement for professional workshops and competent DIY mechanics who demand precise engine management performance.

Technical Information

• Manufacturer: Bosch
• Model: Peugeot 307 1.6 16V (Engine Code NFU, 80 kW)
• Product Codes: 0261207474, 9643840680, 261207474
• Additional Numbers: 1942E4, 1940V8, 19420000, d00, NFP, ME7.4.4

Fitment And Compatibility

Intended For Peugeot 307 Models Equipped With The 1.6 16V NFU Engine. May Also Be Found On Related Stellantis Platforms Using The Same Engine Calibration. Always Match The ECU Part Number And Hardware/Software Codes When Replacing To Ensure Correct Engine Mapping And Sensor Compatibility.

Replacement Procedure (Overview)

Recommended For Qualified Technicians Or Experienced DIY Mechanics. Typical Replacement Steps:

• Disconnect The Negative Terminal Of The Battery To Prevent Electrical Damage.
• Locate The ECU (Position Varies By Model Year; Check Vehicle Manual). Remove Any Protective Covers Or Brackets.
• Carefully Unplug Multi-Pin Connectors Using The Correct Release Clips To Avoid Damaging Terminals.
• Remove Mounting Fasteners, Swap The Unit, And Refit All Fixings.
• Reconnect Connectors And Battery. Clear Fault Codes And Read Live Data With A Diagnostic Tool.
• Note: Replacement May Require Immobilizer/ECU Coding Or Relearning With A Diagnostic Interface (e.g., Manufacturer Diagnostic Tool Or Compatible Scanner) To Restore Security Functions.

Installation Recommendations

• Perform Installation In A Dry, Static-Free Environment. Avoid Working In Heavy Moisture Or Direct Engine Heat.
• Use Properly Rated Tools And Take Care When Handling Connectors—Bent Pins Or Corroded Contacts Cause Intermittent Faults.
• After Installation, Run Full Diagnostic Checks, Clear Historic Fault Codes, And Monitor Sensor Signals (MAF, TPS, Lambda, Cam/Crank) To Confirm Correct Operation.
• If Immobilizer Or Key Recognition Issues Appear, Use Official Or Trusted Diagnostic Equipment To Perform Coding Procedures.

Why This Part Fails (Most Common Reasons)

• Water Ingress Or Corrosion From Leaking Seals Or Flooding Leading To Short Circuits.
• Electrical Spikes, Poor Battery Connections Or Jump-Start Events Causing Component Damage.
• Heat And Vibration Over Time Resulting In Solder Joint Fatigue And Intermittent Connections.
• Damaged Or Corroded Connector Pins Producing Faults Or Loss Of Communication.
• Software Glitches Or Faulty Internal Components Triggering Engine Running Irregularities.

For Workshops And Do-It-Yourself Mechanics Looking For A Reliable Replacement ECU: Verify The Part Number On The Unit You Remove And Compare It With The Codes Listed Above (0261207474, 9643840680, ME7.4.4). Correct Fitment And Proper Coding Ensure Restored Engine Performance, Smooth Idle And Accurate Emissions Control.