Description
OEM reference 4D0907558D belongs to a genuine Audi A8 D2 Engine ECU Control Module sourced from a written-off example of this first-generation flagship saloon. The D2 A8 was offered with V6, V8, and W12 petrol engines as well as diesel options, each requiring sophisticated ECU management. This unit has been bench-tested before listing.
The A8 D2 relied on Bosch Motronic for its petrol engine management, handling multi-point fuel injection, sequential ignition, knock retard, variable valve timing on selected variants, and throttle-by-wire. This ECM also interfaces with the A8 D2’s Quattro AWD management system, providing torque data to maintain traction across all four wheels.
ECU faults on the A8 D2 can surface as Quattro system warnings, unexplained drops in power, transmission shifting anomalies caused by missing torque signals, sensor plausibility codes in the fault memory, difficulty starting, or a complete failure to achieve a ready state after key-on.
Sold as a used and tested component. Confirm OEM number 4D0907558D is the correct reference for your A8 D2 variant and engine code before purchasing. Specialist installation by a technician experienced with D2 electronics is recommended. Immobiliser adaptation and VCDS coding will be required. 14-day returns apply.
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/
