Hi Audizine. I have a 2003 A4 Quattro 3.0L B6 AVK. A scan showed that Bank 1, Sensor 1 O2 sensor was bad. I have since ordered 2 different ones where the male connectors did not match the female that is installed on the car. The one that is installed on the car is a green 4 pin narrow eliptical one that has the inscription of 628 on its face. Any help in getting a sensor with matching connectors would be very much appreciated. Thanks...EddyK