This is from a Kia dealer website:
Is the Kia Warranty Transferable?
If you’re purchasing a pre-owned Sorento or looking to sell yours, then you might be wondering if the Kia warranty is transferable. The basic warranty can be transferred to the new owner, as long as it falls within the first 5 years or 60,000 miles, whichever comes first. The powertrain warranty, however, is not transferable. Yet, if you’re choosing a
certified pre-owned Kia model, you’ll receive a 10-year/100,000-mile limited Kia powertrain warranty and a 12-month/12,000-mile Platinum Coverage package.