Description
The OEM reference 8E0909557A identifies this genuine Audi A4 B6 Engine ECU Control Module. Recovered carefully from a written-off B6 platform vehicle, it has been bench-tested to confirm it operates within factory-specified parameters before being offered for sale.
On the A4 B6, this Bosch Motronic-based unit manages sequential fuel injection, ignition event control, throttle position mapping, idle speed correction, and closed-loop lambda regulation. It also coordinates with the automatic or manual gearbox controller, ABS unit, and instrument cluster over the high-speed CAN bus.
A faulty A4 B6 ECU typically presents with persistent engine management lamp illumination, misfires under acceleration, stalling at idle, unpredictable fuel trims, failed emissions testing, or driver stage error codes stored during diagnostic scanning.
Offered as a used and tested part. Confirm OEM number 8E0909557A against your vehicle identification before ordering. Specialist installation is recommended. Immobiliser adaptation and basic settings adjustment through VCDS may be required post-fitting. 14-day returns policy is in place.
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/
