general problems of the 2000 Lexus LS400

Vehicle was taken to dealer for master key addition . Master key was made by dealer and was defective causing damage to ignition. (21 April 2014) at intervals key could not be removed from ignition. Ignition would lock. Dealer refused to replace key or to refund $186. 00 paid by owner for additional master key. Tires 4-03-2014 as apart of the vehicle inspection tires were checked by technician, deemed to be safe. Cracks became noticeable in the side walls of the tires on 6-17-2014. New tires were placed on vehicle by different company on 6-17-2014 this company determined all four of the tires to be rotten and not safe to be used as a spare. Old rotten tires remain in the possession of this owner.