Description
Magneti Marelli Injection Control Unit for DPF (FAP) on Citroën and Peugeot Vehicles.
This Magneti Marelli injection ECU is designed to manage diesel fuel injection and control the Diesel Particulate Filter (FAP/DPF) functions on compatible Citroën and Peugeot models. It is widely searched by its part numbers, so listing codes such as 9647428280 or 09733309901 will help technicians and DIY mechanics find the correct unit quickly. The unit interfaces with engine sensors and actuators to trigger regeneration events, monitor filter status and record fault codes related to the exhaust aftertreatment system.
Key Benefits and Where It Fits
Engineers and independent workshops value this ECU for reliable control of DPF regeneration cycles and precise fuel injection timing on affected PSA diesel engines. Replacing a faulty unit can restore proper regeneration, eliminate persistent DPF warnings and prevent limp-mode events that reduce vehicle drivability.
Compatible Models
- Citroën C5
- Citroën C8
- Peugeot 307
- Peugeot 807
How The Unit Is Replaced
Replacement requires basic mechanical skills and electrical care. Typical steps include:
- Disconnect the negative battery terminal before starting.
- Locate and remove any covers or brackets protecting the ECU.
- Carefully unplug all electrical connectors, noting locking tabs and pin positions.
- Unbolt the unit from its mounting and replace with the new ECU, securing all fasteners to the manufacturer’s torque where specified.
- Reconnect connectors and the battery, then proceed with coding or cloning as required (see Coding section).
Technical Information
- Manufacturer: Magneti Marelli
- Model: Citroën / Peugeot diesel vehicles (see compatibility list)
- Product Codes: 9647428280, 09733309901, EAS300.01
- Other Numbers: 1525CY, NFP, ECU FAP
Installation Recommendations
Always follow safe workshop practice: disconnect the battery, wear appropriate PPE and avoid forceful connector removal. Inspect connector pins and harness for corrosion or heat damage before installation—clean or repair wiring as required. After mechanical fitment, perform the required coding/cloning procedure to ensure the ECU can manage DPF functions correctly. If you lack PSA diagnostic tools, have the unit initialized and adapted by a technician with DiagBox/Lexia/PP2000.
Why This Part Most Commonly Fails
Failures are typically caused by factors that increase thermal and electrical stress: prolonged clogged DPF leading to excessive backpressure and heat, water ingress or moisture causing corrosion at connectors, and intermittent sensor faults that force repeated regeneration cycles. Electrical surges or poor grounding may also damage internal electronics. Addressing the root cause (e.g., cleaning or replacing a blocked DPF, repairing sensors or wiring) is essential to prevent repeat ECU failures.
Installation And Coding – Important
- The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
- Options To Enable Operation:
- 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).
- Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damaging The Unit.
Useful Keywords For Search: Magneti Marelli ECU, DPF Control Unit, ECU FAP, Citroën ECU, Peugeot ECU, 9647428280, 09733309901.
