It's hours of work to replace one of these on an NX. Completely different setup. I had one break on me and I was totally dead in the "water." The pedal shaft, which the springs wind around, have potentiometers and the computer will balk if there's a conflict with pedal positioning (forward and reverse). My wife piloted as I towed it back to the shop. I'd performed a bunch of maintenance, even doings some things that I hoped would, and briefly thought would, address this issue (the dealer said they poked at it- I don't think they are very analytical). Was feeling really good until... Pedal drops to the floor and stays there! Pulling it back up made no difference.
Factory defect with the spring and over time it weakened and finally broke. It was always a bit weird since new, it periodically had the feel of a slightly sticking pedal. The break in the spring would flex more as things warmed up.
I'm also thinking about ordering up some spares :thumbsup:
