The previous answer is not true! If you look at your VIN number and the first character is a 1 it was built in North American and chances are in the United States see this to tell: http://en.wikipedia.org/wiki/Vehicle_id
entification_number . Anyway, the UEX is the Ultra EX model. Basically it is given to the ones that got the V6. It was a big upgrade for a long time even though it is almost a given anymore with them. Hope this still helps!
4... My mechanic, the BMV, and general knowledge.