Description
The 8E0907401D is a genuine factory-fitted engine management unit from the Audi A4 B6 — the fourth-generation A4 compact executive saloon produced from 2000 to 2006. This ECU governs fuel injection, ignition timing, lambda sensor feedback and emission system operation for the relevant petrol powertrain, delivering the precise engine management associated with the A4 B6 across its range of four-cylinder and six-cylinder engine options.
The B6 A4 uses a Bosch Motronic engine management system and this ECU is central to it. The unit reads data continuously from the airflow meter, throttle position sensor, crankshaft and camshaft sensors, and both pre- and post-catalyst lambda probes to refine fuel delivery and ignition timing on every combustion event. The adaptive knock retard function ensures the engine can tolerate variations in fuel quality without sustaining damage over time.
An ECU beginning to fail on the A4 B6 may cause symptoms such as intermittent misfires that cannot be attributed to ignition components, rough running when the engine reaches operating temperature, an engine warning light paired with vague codes pointing to multiple systems simultaneously, or loss of throttle response that cannot be reproduced by a standard service inspection.
This is a genuine used OEM part recovered from an Audi A4 B6 and bench-tested before despatch. Used Audi ECUs require coding and adaptation to the receiving vehicle using VCDS or dealer-level diagnostics, including immobiliser synchronisation. Confirm the part number matches your existing unit 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/
