The car suddenly lost almost all power & just limped home. On idle it would surge up and down like you were revving the engine then letting off. I've actually had to replace this twice in the 2 1/2 years I've owned the car. Of course it was cheaper to fix because I got the throttle body assembly off of e-bay for under $100. It's very simple to change out, if it has been changed before. Maybe 15 minutes. But on this year model, the old part # has been superceded and the newer throttle body has a different electrical plug. This requires getting a new plug end complete with the 6 (if I remember right) wires running into it. You must then disassemble the wiring harness & splice in the new end. A royal pain. And don't even think you can logically figure which wires go where on the new harness. It's not number to number, color to color or position to position. Get the replacement diagram to know which wire goes where or you will ulitmately end up buying another plug after several failed attempts to get it right. Since getting a second new end & doing shrink wrapped splices, I've had no more problems.