1991 Audi 90 Q&A
1991 Audi 90 Question: are spark plug wires interchangeable with other years and models of the car.
Your local parts store should have a breakdown of what is required for each wire in a set or take old one in and they can match. - raiderron
Look at www.rockauto.com ,they usually have good images of parts, see if the part number crosses over to any other car. - patrick mannion