Might want to check to make sure that they didn't chew on anything. They have a habit of chewing on the most expensive or difficult to replace part. Had a rodent chow down on my car. I noticed the problem when I could no longer use cruise control. Computer told me that the speed sensor was not working so I took it to a mechanic. He said some sort of rodent had chewed through several wires so I had to replace the entire wire harness.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.