Engine Control Unit IAW 6LP2.05 9653979480 9659099180

Description

Control Unit Magneti Marelli IAW 6LP2.05
Fits 1.4 16V KFU engines for Citroën and Peugeot vehicles
It is from a Citroën C4

This Magneti Marelli IAW 6LP2.05 engine control unit (ECU) is a direct-fit replacement for vehicles equipped with the 1.4 16V KFU petrol engine. Designed for professional workshops and experienced DIY mechanics, the unit manages fuel injection, ignition timing and sensor signals to restore correct engine performance, drivability and emissions control. Commonly searched by part numbers and codes (IAW 6LP2.05, 9653979480, 9659099180, 16.631.054, 16.735.054, 1940XH, 1940XJ), this unit is suitable for Citroën and Peugeot platforms and is especially relevant for Citroën C4 and compatible Peugeot models with the 1.4 16V KFU engine.

Technical Information

• Manufacturer: Magneti Marelli
• Model: IAW 6LP2.05
• Product Codes: 9653979480, 9659099180
• Additional Numbers: 16.631.054, 16.735.054, 1940XH, 1940XJ, NFP
• Fits Engines: 1.4 16V KFU (Petrol)
• Typical Vehicles: Citroën C4; select Peugeot models (e.g. 307) with the 1.4 16V KFU engine

Compatibility And Application

The ECU is intended for vehicles fitted with the 1.4 16V KFU petrol engine. Fitment depends on engine code and electrical connector configuration; exact compatibility is governed by the ECU part and software version. This unit is commonly found on Citroën C4 and some Peugeot models—verify engine code on the vehicle to ensure correct replacement.

Installation

Recommended for professional mechanics or experienced DIY technicians. Basic replacement steps:

• Disconnect the negative terminal of the battery before any work.
• Locate the ECU (position varies by model: engine bay or passenger compartment). Refer to the vehicle repair manual for exact location and access procedure.
• Unplug electrical connectors carefully, release any locking tabs and note connector orientation.
• Remove mounting bolts and extract the old unit.
• Fit the replacement unit, secure mounting bolts to the manufacturer’s torque specification and reconnect all connectors.
• Perform required coding, cloning or initialization (see Installation and Coding section below) before attempting to start the engine.
• After installation, check for fault codes and verify correct engine operation and sensor readings.

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 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 Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
• Before Removal/Installation Always Disconnect The Battery And Follow The Manufacturer’s Procedure To Avoid Damaging The Unit.

Why This Part Commonly Fails

• Water Ingress And Corrosion Causing Connector Or Circuit Damage.
• Electrical Surges Or Poor Grounding Leading To Component Failure.
• Internal Solder Joint Cracks Due To Vibration And Thermal Cycling.
• Connector Wear Or Bent Pins Causing Intermittent Signals.
• Age-Related Electronic Component Degradation.

Symptoms Of A Faulty ECU

• Engine Won’t Start Or Cranks Without Ignition.
• Intermittent Stalling, Misfires Or Poor Running.
• Erratic Idle Or Sudden Loss Of Power.
• Persistent Engine Fault Codes Related To Sensors, Fuel Injection Or Ignition.

Replacement Advice

ECUs have no fixed service interval; lifespan depends on operating conditions. If symptoms point to ECU failure, perform a full electrical inspection (battery voltage, grounds, connector condition) and read fault codes before replacement. Where possible, cloning the original unit’s EEPROM/Flash preserves immobilizer and vehicle-specific data and is typically the fastest route to a plug-and-play result. If cloning is not available, virginization and coding with PSA diagnostic tools will be required to bring the unit into service.

Who Should Install

Suitable for professional auto-electricians and competent DIY mechanics comfortable with vehicle electronics and coding procedures. For correct commissioning of used ECUs and secure immobilizer handling, use of PSA diagnostic equipment and trained personnel is strongly recommended.

Keywords For Search

IAW 6LP2.05, Magneti Marelli ECU, Engine Control Unit, 9653979480, 9659099180, Citroën C4 ECU, Peugeot 307 ECU, 1.4 16V KFU ECU