Problem started about 2 mo. ago. When backing out of the driveway brake pedal would go down further than normal. Problem starting occuring more often when driving as well. Had a brake fluid leak in the rear passenger tire so I replaced both rear calipers, turned rotors, and new set of Wagner pads (semi-metallic front, ceramic rear). Had local mechanic do the work but the pedal is still going down occasionally (scares the hell out of me). Mechanic said he bled the lines and thinks it's an eletronic issue. In fact, he didn't want me to drive the car home as he feels it is a safety issue. The car has approx. 117K miles on it and my 18yo son is the primary driver so I don't feel comfortable letting him drive the car until I know the problem is fixed for sure. Another note, when I bought the car I used to be able to push the traction button and the icon would show up but it hasn't displayed in a couple of years. I don't know if this has anything to do with the brake issue. Please help!
