we found this green o-ring as first equipment in 0AW transmissions. But the manufacturer offers a black o-ring of different dimensions for repair. The black o-ring would be our part-no. A 03 27 OR054 0AW20 - both o-rings are included in our overhaul kit A 03 27 DS072 0AW. Please choose carefully which one to use - we are not sure if the dimensions make a difference or the black o-ring replaces the green one - there are no info available from the manufacturer.