Genuine OEM Audi Alternator Voltage Regulator, part number 079903803A. This essential electrical component is responsible for precisely controlling the output voltage of the alternator, ensuring a stable power supply to the vehicle's electrical systems and battery. It is typically integrated into or mounted on the alternator assembly. Weighing approximately 0.123 kg, this regulator is built to factory specifications. Choosing a genuine OEM regulator ensures accurate voltage regulation and long-term reliability, preventing damage to sensitive electronic components and extending battery life.