On 2004 and later models, a 6mm x 300mm rod will be needed for upper control arm installation. Begin by loosening the front wheel lug nuts, raising the vehicle, securely placing it on jack stands, and removing the wheel. Support the lower control arm with a floor jack. Next, remove the shock absorber/coil spring assembly and the ABS wheel speed sensor harness bracket from the upper control arm. Remove the cotter pin, then loosen, but do not remove, the castle nut from the upper ball joint stud, using a two-jaw puller or equivalent to separate the ball joint from the steering knuckle. The nut will prevent the upper control arm and the steering knuckle from separating uncontrollably when the parts suddenly pop loose. Separate the upper control arm from the steering knuckle with a two-jaw puller, then remove the nut, ensuring the top of the steering knuckle does not fall outward; secure it with a piece of wire if necessary. Remove the upper control arm mounting bolts, then take out the upper control arm. For 2003 and earlier models, mark the relationship of the upper control arm to the frame before removing the mounting bolts. Installation is the reverse of removal, noting that on 2004 and later models, a 6mm x 300mm rod should be placed in the holes provided in the frame to position the upper control arm, which holds it in the correct position while the arm fasteners are tightened. For 2003 and earlier models, use the reference marks made previously and tighten the mounting bolts while holding the control arm at the proper angle. Ensure the ABS wheel speed sensor harness bracket is installed and the fasteners are tightened securely. Finally, install a new cotter pin after reconnecting the ball stud to the steering knuckle.