Is there a chip available for my Audi? If your 12v Audi was built in 1992 or early 1993 (i.e. it has the MMS 200 series ECU), then you
might be able to find a chip. If you do find a chip, you will probably also find that the biggest change
you notice is a big drop in fuel economy. Apparently, because of this there was never a big demand for 12v
chips, and so little effort was made to crack the Hitachi MMS 300 ECUs.