Description
The 8E0907401J is a factory engine management module for the Audi A4 B6, the compact executive saloon built between 2000 and 2006. The J-suffix calibration within the 8E0907401 family denotes a specific software revision matched to the applicable engine code, transmission type or emission standard, making this a direct replacement for vehicles carrying this exact OEM number. The unit takes responsibility for fuel injection control, ignition timing, idle speed regulation and emissions management on the relevant petrol powertrain.
Communicating with the B6’s immobiliser ECU, automatic gearbox controller and ABS module via the CAN bus, this ECU shares engine data used by those systems for traction control intervention, shift point calculation and fault diagnosis. It monitors the mass airflow sensor, oxygen sensors, knock sensors and throttle actuator to maintain precise combustion on every cycle, adapting injection and ignition maps to reflect engine condition and fuel quality over time.
When the ECU on an A4 B6 begins to degrade, drivers often experience the engine running erratically after a period of normal operation, persistent engine fault lights accompanied by codes for sensors that were recently replaced, difficulty starting in damp or cold conditions without a battery or starter fault, or the automatic transmission shifting inconsistently due to incorrect engine torque signals communicated to the gearbox module.
This is a genuine used OEM part recovered from an Audi A4 B6 and tested for functionality before despatch. Second-hand Audi ECUs require coding and immobiliser adaptation using VCDS or equivalent VAG diagnostic tools. Please verify this part number against your existing ECU before ordering.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
