You need to raise and support the vehicle, remove the tire and wheel, the brake caliper and the hub and rotor, disconnect the wheel speed sensor electrical connector and detach the rosebud clip, remove the bolt and washer, the rosebud clip on the upper control arm, the bolt and nut, the splash shield mounting bolts, the wheel speed sensor and splash shield assembly, and the splash shield gasket, and clean the gasket and knuckle surfaces.