No easy. Jack up put axle stand under raduis arm for safety. Remove wheel. Remove caliper and carrier, secure caliper out of way. Ideally remove disc and backplate. Can be done without this but makes damaging new seal easier if you can't get them off. Undo 13mm (snanner size) bolts, axle to hub. Withdraw halfshaft and hub. See seal in axle, remove. Fit new, grease inside of new seal all round, grease bearing surface on halfshaft. VERY carefully feed halfshaft back into axle be sure NOT to let it rest on new seal. Locate halfshaft in splines and hub to axle bolt up. Replace removed components. Hows that.