Hello,

What Digifant system does a 1991 Audi 80 2.0E car have? I am trying to locate the oxygen sensor as well so would be nice if you can provide the answer as well. Thanks!

There could be a split that year, so it's best to give your local Audi dealership parts department a call. They can fax you an exploded view of the specific area you are interested in. And they can assist you with finding the problem areas.