If you are using the brighter style halogen bulbs they won't last as long as the stardard duty halogens. Those brighter models burn the element at a higher temp and therefor don't last very long.With what frequency if any do you have to replace your headlights? I find myself with my 2003 having to change at least 1 every 6-8 months. It alternates between sides and quality of bulb has no effect. I've owned it since mid 2008 with no other electrical or signal bulb problems.