8X1857409G9B9 - Outside mirror OE number by AUDI, VW

AUDI :   8X1 857 409G 9B9, 8X1857409G9B9
VW :   8X1857409G9B9
  OE Number - stands for Original Equipment Number - the number of complete component or sub-assembly that was originally fitted to the vehicle. OE Number is interchangeable with the term Genuine Number

Replacement parts compatible with OE numbers