Description
This listing is for OEM part number 4A0907404B — a genuine used, tested Engine ECU Control Module originally fitted to the Audi 100 (Type 4A/C4), the prestige executive saloon and Avant produced from 1990 to 1994 and the direct predecessor to the Audi A6.
The engine control module manages core powertrain functions including fuel injection timing, ignition advance, idle speed regulation, and closed-loop lambda control. Working in conjunction with the vehicle’s sensors and fuel delivery system, it ensures precise combustion efficiency and smooth power delivery across the rev range.
A failing ECU on the Audi 100 typically presents as difficulty starting, intermittent misfires, erratic idle behaviour, loss of power, or a persistent engine warning light. In some cases the engine may cut out without warning, or the vehicle may enter a reduced-power limp mode to protect the drivetrain.
This unit has been removed from a written-off vehicle, verified against the original OEM specification, and fully tested prior to dispatch. Professional installation is strongly recommended, and ECU coding or adaptation to the target vehicle may be required. We offer a 14-day return period on this part.
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/
