Well the car was bought new September 1st 2017. But mileage does play some factor. Probably more than time. But there are other factors such as daytime to nighttime driving ratio. Type of roads driven on. Do you have a lot of rainy days with headlights on. I have a 2005 truck with 60000miles. Original headlights because they just sit in a dormant state. People that see my posts generally know I am the road warrior for the group and I just like to let everyone know the issues that arise through my abuse of my vehicle. That being said, two light bulbs, 1set of tires, some wiper blades and oil changes is not bad for 120000 miles. Original air filter, no alignment, and no I have not changed the actuator fluid 6 times as Kia recommended.