 I have had my Sorento for less than 3 years now and I have had to replace 11 bulbs between the low beam, high beam, tail lights, and brake lights.  Each bulb averages $35 at the dealership to replace.  If it is within 1 year, they replace at no cost.  Of the 11 bulbs, 9 have lasted 14 months, which is not covered by the dealership.  Something has got to be wrong, and they claim nothing.  BULBS DO NOT GO OUT LIKE THIS!