you dont need to replace the lower control arm. the only bolts that should have came off are. The 17mm crown nut under the brake, the upper one, tie rod one, strut fork, axel nut, the calipers. then the whole thing comes out. you pop the new one on, and put the bolts back in. should take 30mins for both sides. also remember to get a alignment when your done.and make sure the cotter pins are put back