I see black spots on the garage floor on both sides right in the inside of where the front tires are. 2012 with about 84k on the clock, but I will make absolutely sure, obviously. I saw a Youtube vdeo where the dude pulled the arms off then pulled the bushing assemblies off and reinstalled new ones, reinstalled with the old arms and ball joint. I fished around and on another post found Rock auto part #, RK621550 & RK621551, they are about $145 each. Why would anyone not replace the whole arms and just the bushings? Is the parts price differential that great?