Description
Part number 4B0907552C is a genuine Audi A6 C5 Engine ECU Control Module sourced from a written-off example of this executive saloon. Recovered in good condition and bench-tested against C5 platform specifications, this unit has passed all pre-sale operational checks.
This ECM manages the A6 C5 engine through Bosch Motronic coordination of injector firing, spark advance, throttle-by-wire response, and exhaust gas temperature monitoring. It processes data from multiple sensors simultaneously, maintaining combustion efficiency across varying load and ambient conditions.
Common symptoms associated with a defective A6 C5 ECU include erratic or fluctuating idle, sudden loss of engine power, fuel mixture faults logged in long-term trim data, intermittent no-start conditions, or unexplained activation of the engine management warning lamp.
This unit is used and fully tested. Always verify OEM number 4B0907552C matches your vehicle and engine code before ordering. A qualified technician should perform installation. Immobiliser coding and VCDS-based adaptation may be required after fitting. 14-day returns are 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/
