Description
OEM reference 4B0907557J is a genuine Audi Engine ECU Control Module carrying the 4B platform prefix, consistent with the A6 C5 executive series. Recovered from a written-off donor vehicle, this unit has been bench-tested to confirm full functionality before being listed for sale.
Units in the 4B0907557 series manage engine fuelling, ignition timing, boost control on turbocharged variants, and throttle positioning through the Bosch Motronic platform. The ECU interfaces with the vehicle CAN bus to exchange torque and status data with the transmission, ABS, and instrument cluster modules.
Failure symptoms on this platform typically include a persistent engine management lamp, stored sensor plausibility or driver stage fault codes, rough idling, unexpected misfires, difficulty starting, or the engine entering a protective limp-home mode under normal driving conditions.
Offered as a used and tested component. Verify that OEM number 4B0907557J is the exact match for your vehicle and engine code before purchasing. Fitting by a qualified technician is strongly recommended. Adaptation coding and immobiliser pairing via VCDS 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/
