My 99 Toyota Camry needs the left wheel bearing hub replaced according to my mechanic at American Toyota. He found this while mounting my new tires (Cdan) and doing an alignment. (not when I took it in under warranty for front end noise more than a year ago. ). The (St)dealer service writer recomended that I replace both hubs at the same time for $455. I'll have my indy wrench do it with OEM parts instead. Should I do both or just the bad hub. Also after the service should I get the car aligned again?