How much do the entire knuckle for the V6 cost at the junkyard? If you wanted to replace them with new parts, you just need the hub and bearing assembly for the front and hub/bearing in one unit for the rears. The cost is about 3 bills but the labor will cost you about 2 bills as well. Of course, you still need to get V6 calipers, rotors and pads for the front and rotors and pads for the rear and that can cost a pretty penny depending on where you get them from.