Description
Magneti Marelli IAW 6LP2.05 control unit. Fits 1.4 16V KFU engines for Citroën and Peugeot vehicles. It is from a Citroën C4.
Product Overview
The Magneti Marelli IAW 6LP2.05 Engine Control Unit (ECU) is a direct-fit electronic control module used on PSA 1.4 16V KFU petrol engines. This unit controls fuel injection, ignition timing and engine management strategies to ensure smooth running, correct emissions and optimal fuel consumption. The part is often searched by its OEM numbers, so listing the exact product codes below helps fast identification for professional mechanics and competent DIY enthusiasts.
Technical Information
- Manufacturer: Magneti Marelli
- Model: IAW 6LP2.05
- Product Codes: 9664339980, 9664934380
- Other Numbers: 9653979480, 9650909180, 16.735.084, 16.631.064, 16.631.054, 16.735.054, 1940XH, 1940XJ
Compatibility
Designed for vehicles equipped with the 1.4 16V KFU engine family. The listed unit originates from a Citroën C4 but is compatible with a range of Citroën and Peugeot models that use the same engine and ECU variants. Always match the part numbers when searching for a replacement to ensure correct fitment.
Installation and Coding – Important
– The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
– Options to get the unit operational:
1) Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
2) Virginisation and subsequent initialization/telecoding via DiagBox (or online) + key adaptation.
– Recommended to be performed by a professional 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 negative battery terminal before starting work. Access the ECU according to the vehicle’s repair manual, remove protective covers and carefully unplug multi-pin connectors using appropriate tools to avoid damaging locking tabs. Unbolt the control unit, replace and secure with the correct torque, reconnect connectors ensuring clean contacts, then proceed with cloning or coding as required by the vehicle. After installation, clear fault codes and verify engine operation on a test drive. If you lack PSA diagnostic equipment, arrange cloning or coding with a qualified workshop to avoid immobiliser or drivability issues.
Symptoms Of A Faulty ECU & Common Failure Causes
- Typical symptoms: engine will not crank or start, intermittent stalling, misfires, poor idling, limp-home mode, or multiple diagnostic trouble codes related to sensors/actuators.
- Common causes of failure: water ingress/corrosion, damaged connector pins, thermal cycling and solder joint fatigue, voltage spikes or poor grounding, short circuits from wiring faults, and prolonged exposure to engine bay heat or moisture.
- Diagnostics tips: check fuses and relays, inspect wiring harness and connectors for corrosion or damage, scan for stored fault codes, measure ECU power and ground rails before replacing the unit.
Why Choose This Unit
This Magneti Marelli ECU is identified by well-known OEM numbers, making it straightforward to match for repairs. For mechanics and experienced DIYers it offers a cost-effective option when combined with correct cloning or coding. When installed and programmed correctly it restores original engine management functions and drivability.
Notes For Buyers
Searches are often performed by part number—use the product and other numbers above to confirm compatibility. The unit supplied comes from a Citroën C4 and is suitable for vehicles using the IAW 6LP2.05 configuration.
