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 intended for petrol 1.4 16V KFU engines used in Citroën and Peugeot models. The unit controls fuel injection, ignition timing and related sensor inputs to ensure correct engine running, emissions and drivability. Supplied as a used replacement taken from a Citroën C4, it is a direct-fit unit for compatible vehicles when matched and prepared correctly.
Key Benefits
- Direct compatibility with 1.4 16V KFU engine installations in Citroën/Peugeot models.
- Original Magneti Marelli hardware designed for factory-level engine management.
- Commonly referenced by OEM part numbers for fast identification (see Technical Information).
- Suitable for professional workshops and experienced DIY mechanics familiar with ECU replacement and coding.
Fitment And Application
Commonly fitted to Citroën C4 and Peugeot 307 models equipped with the 1.4 16V KFU petrol engine. Check the engine type and ECU part number on the original unit before replacement. This unit is frequently searched by product codes such as 9653979480 and 9657429380.
Technical Information
- Manufacturer: Magneti Marelli
- Model: IAW 6LP2.05
- Product Codes: 9653979480, 9657429380
- Other Numbers: 16.631.054, 16.735.044, 1940XH, 1940XJ, NFP
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 technician 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
- Always disconnect the vehicle battery before starting work and wait a few minutes to ensure all capacitors are discharged.
- Label and photograph connectors before unplugging to ensure correct reassembly.
- Remove mounting bolts and unplug harness connectors carefully; avoid pulling on wires.
- If the unit requires cloning or coding, perform the procedure with appropriate diagnostic equipment before or immediately after installation according to the chosen method (cloning or virginization).
- After installation, check for wiring harness integrity, clean connector contacts if corroded, and confirm all engine sensors operate correctly via diagnostics.
How Replacement Is Performed (Overview)
- Disconnect negative battery terminal.
- Locate the ECU (usually in engine bay or passenger footwell depending on model).
- Unplug all electrical connectors and remove securing screws or brackets.
- Install the replacement unit, secure mechanically and reconnect harnesses.
- Complete cloning or coding procedure as required (see Installation And Coding – Important).
- Reconnect battery and verify engine starts and runs; clear any fault codes and perform functional checks.
Why This Part Most Commonly Fails
ECUs like the IAW 6LP2.05 are generally durable, but failures typically result from external factors rather than normal wear. The most common causes are water ingress and moisture corrosion at connectors, thermal stress and solder joint cracks from repeated heat cycles, voltage spikes or poor battery/charging system condition, and physical damage or connector corrosion. Symptoms of a failing unit can include no-start, erratic idle, misfires, loss of fuel injection, and multiple engine management fault codes.
Notes For Buyers
Searches for this item are often performed using the OEM product codes (9653979480, 9657429380, 16.631.054, 16.735.044, 1940XH, 1940XJ). Suitable for professional installation or experienced DIY mechanics. Ensure that cloning or coding is planned as required for full functionality after replacement.
