Audi TCM Fits - AUDI 100 92 - 94 Transmission, (under pass side footwell)AUDI A6 95 - 95 Transmission, (right pass frontwell under carpet), exc. QuattroUp for sale is a Working, in excellent condition Audi 100 / A6 TCM. A TCU problem can manifest itself as a transmission problem, but can be difficult to tell if it's that or the transmission itself or the control unit. These TCU's new cost is often times as much as a new transmission itself. At this price buy it and throw it on the shelf if you plan to drive one of these fine cars for a while as these are over $2300 from Audi! Always your best bet is to match the part numbers with the part you need.