One problem related to automatic transmission has been reported for the 2003 Audi Quattro. The most recently reported issues are listed below.
Car totally loses power when pulling out into traffic, etc. Happens all the time, feels like car is going to stall, almost got rear ended a few times because car has no power. Brought it back for this 3 x since last oct. Nothing was done, same response from Audi, no problem found. This car is an accident waiting to happen !.