If you follow the fuel line from the fuel tank to the engine you will find the fuel filter unless it is a permanent filter that is located in the fuel tank. I suspect you will find it has a permanent filter.
inside the tranny pan
The filter is inside the transmission and is not to be serviced. Just drain fluid and replace.
From a Hyundai dealer technician- there is no serviceable fuel filter on the 2003 Sonata. The filter is a "lifetime" strainer on the fuel pump in the fuel tank. It would be replaced with the replacement of the fuel pump only. how do you replace fuel pump on the 2003 sonata
its an internal filter on top of the engine under the hood. its in a cylinder canister with a hard plastic top.
The 2003 Hyundai Sonata has 16 valves.
The 2003 Hyundai Sonata is a gas-powered vehicle.
The 2003 Hyundai Sonata has an inline 4 engine.
The 2003 Hyundai Sonata has a 5-speed manual.
The 2003 Hyundai Sonata has double overhead cam (DOHC).
The 2003 Hyundai Sonata runs on regular unleaded.
The 2003 Hyundai Sonata's turning circle is 34.4 ft..
The height of the 2003 Hyundai Sonata is 4 ft. 8 in. (56 in.).