Description
Magneti Marelli IAW 6LPB Control Unit for Citroën and Peugeot Vehicles
This Magneti Marelli IAW 6LPB engine control unit (ECU) is designed for petrol 2.0 16V applications fitted to a range of Citroën and Peugeot models. The module manages fuel injection, ignition timing and engine management functions to ensure smooth running, stable idling and optimal emission levels. It is a direct-fit electronic control unit commonly referenced by OE numbers and aftermarket codes, making it easy to find by part number for professional workshops and DIY mechanics.
The IAW 6LPB is typically used on 2.0 16V petrol engines and works with standard engine sensors (MAF, MAP, coolant temp, cam/crank sensors) and actuators (injectors, ignition coils, idle control). When replacing the unit, correct data transfer or initialization is required so the vehicle recognizes immobiliser and engine parameters. The unit can be fitted as a replacement for faulty ECUs to restore engine management functions, but proper handling and coding are essential to ensure full operation.
Technical Information
- Manufacturer: Magneti Marelli
- Model: Citroën C5; Peugeot 307; Peugeot 407
- Product Codes: 9660774680; 9659580780
- Additional Numbers: 19423C4; 1939QZ; 1942ZP
- Type: IAW 6LPB, 2.0 16V Engine Management ECU
Fitment And Replacement
Replacement is straightforward for trained technicians: disconnect the battery, remove any trim or mounting brackets protecting the ECU, unplug the multi-pin connectors and remove the unit. Installation is the reverse. After mechanical fitment the ECU must be put into the correct state for the vehicle (see “Installation and Coding – Important” below). Always follow the vehicle manufacturer’s procedures when working on electronic control units.
Installation And Coding – Important
- The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
- Activation Options:
- Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
- 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.
Installation Recommendations
- Handle The ECU Carefully To Avoid Electrostatic Damage; Use ESD Precautions Where Possible.
- Ensure Connectors Are Clean And Free Of Corrosion; Inspect Wiring Harness For Damage.
- When Cloning, Verify EEPROM/Flash Readouts Are Complete And Valid Before Programming The Replacement Unit.
- After Coding Or Cloning Perform A Full Engine Start-Up Sequence And Check For Fault Codes With A Diagnostic Tool.
Why The Part Most Commonly Fails
ECUs like the IAW 6LPB typically fail due to water ingress, connector corrosion, thermal stress from engine bay temperatures, or electrical faults such as voltage spikes and poor grounding. Symptoms of a failing unit include engine misfires, stalling, loss of communication with diagnostic tools, failure to start or multiple engine management fault codes. In many cases the underlying cause is related to environmental exposure or wiring issues rather than the ECU core itself.
Who Should Fit This Part
Intended For Professional Auto Technicians And Competent DIY Mechanics Experienced With Engine Electronics. Because of The Required Coding/Cloning Steps, Workshop Equipment Capable Of EEPROM/Flash Operations Or PSA Diagnostic Tools Is Recommended.
