Description
The OEM reference 8D0907557S identifies this genuine Audi A4 B5 Engine ECU Control Module. Shared across the VAG B5 platform — including the Passat and Superb — this unit was sourced from a written-off vehicle and has been verified through bench testing before dispatch.
Depending on the engine code, this ECU manages either petrol or diesel fuelling strategies on the B5 platform, coordinating injection timing, boost pressure on turbocharged variants, idle speed correction, and exhaust emissions compliance. Diesel variants operate via Bosch EDC15, while petrol units use the Motronic ME7 architecture.
A deteriorating B5 ECU can produce intermittent misfires, abnormal smoke output on diesel variants, idle instability, unexpected limp mode, or stored diagnostic codes pointing to internal ECU driver faults, injection irregularities, or sensor signal plausibility errors.
This is a used and tested part. Confirm that OEM number 8D0907557S matches your specific vehicle and engine code prior to ordering. Professional installation by an experienced VAG technician is recommended. VCDS adaptation and immobiliser coding will be required. 14-day returns accepted.
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/
