RepairPal Certified shops can diagnose and repair your 2004 Kia Optima. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
On the 2.7L 6 cyl engine, the fuel filter is inside the fuel tank and only needs to be changed if the fuel pump assembly is being serviced.>>>>>On the 2.4L 4 cyl engine, it is located just in front of the fuel tank on the right side of inner frame