I have a 2007 x5 ... the clear plastic is badly scratched and it would look good to.replace.them. New are very expensive.and.good.condition older are likely messed.up. so if.I just.need.to.replace.housings what.years.Will.work? Will.lock versions.work? How much work to.replace? Does.one.need.to.adjust light alignment when replaced? Do service.coding?