Which part? Passenger axle or driver side axle + half shaft?
Jack the car up, take out the brake caliper and rotor. Take off the axle nut, unbolt the suspension fork, slip the axle out. Slip the new one in, align the fork, put the bolt in, then the axle bolt, rotor, caliper, wheel and then take out the jack stand and lower the jack. It's not too hard.