3B0253057CX - Catalytic converter OE number by AUDI, VW

AUDI :   3B0253057CX
VW :   3B0.253.057 CX, 3B0253057CX
  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