I'm not sure these people really understand the cars they're meant to be maintaining. I had an oxygen sensor engine light, and a transmission speed sensor engine light. They replaced one of the oxygen sensors, and did some ""transmission work"", then charged me $600. As I drove away the car dropped into 3rd gear and the same errors came back up. I brought it back and they said (a) it was the intake manifold, (b) it was some electrical problem and (c) I should sell the car. I asked about the warranty on their work and they said that ""they only did what my car told them needed to be done"". Apparently it was my car's fault for misleading them. Well, at least they have my $600 to make them feel better for the deception. Needless to say, I won't be going back. Update: I brought the car to a real mechanic this week, and it was the main CPU (I suggested this to the dealer, but they said ""No, it can't be that.""). Problem solved, but not by Towne Hyundai.