How to Change a Fuel Filter on a KIA Optima – The fuel filter location varies with engine size on the Kia Optima. The 1.5-, 1.6- and 2.4-liter engines have the fuel filter located under the car in the front left corner of the fuel tank. The 1.8-liter engine has the fuel filter located on the driver’s side firewall.
All the filters have the same replacement procedure. There are actually two filters on the Kia Optima. A filter called a strainer is attached to the intake side of the fuel pump inside the fuel tank.
Tools Used: Tools, Floor jack, Jack stands, Ratchet, Set of sockets, Scribe
Change a Fuel Filter
Lift the hood and remove the cap on the fuse and relay box located on the driver’s side fenderwell.