Tl* the contact owns a 2012 jeep liberty equipped with goodyear wrangler sr-a tires, size: p245/50/r20 (na). while the vehicle was undergoing routine maintenance, the technician noticed blisters on the rear driver side tire and the inside rubber was separated from the tire. the technician stated that the tire was not serviceable and could not be rotated. the tire was not replaced. the manufacturer was notified of the failure. the approximate vehicle failure mileage was 54,635 and the tire failure mileage was 4,000.