Will there be any problem if a passport is renewed before landing as?
You won't have any problem what so ever as long as you have your older passport with you. Specially if they have stamped a visa in your old passport. Also when you were issued a visa. You had to give them a valid passport. Either they must have stamped a visa in your passport or passport number was entered on visa document. In either case you must carry your older passport with you. Once you get PR card and your new passport is stamped with arrival stamp. You won't need to carry your old passport anymore.