I would imagine it is very easy to fix. Unlike older cars, where it was transmission based; on the 4th gen I believe it is wheel attached. ABS wheel sensor. As long as you are talking the physical sensor is bad, and not that the wiring got ripped out; it should be simply a unplug and replace. They may need to pull the tire to do it, but yea; I guess 1 hour MAX labor time.
The sensors are looking to be around 200 dollars.