well it might be and internal filter which is front of oil pan which is towards front of car and i think you need a 24 MM socket and the drain plug a 17MM i think and it hold 4 maybe 4.5 quarts check owners manuel for that
The 2004 Toyota Avalon has a V6 engine.
The 2004 Toyota Avalon has 24 valves.
The 2004 Toyota Avalon is a gas-powered vehicle.
The 2004 Toyota Avalon has a 4-speed automatic.
The 2004 Toyota Avalon's turning circle is 37.6 ft..
The 2004 Toyota Avalon is 15 ft. 11.9 in. (191.9 in.) long.
The height of the 2004 Toyota Avalon is 4 ft. 9.1 in. (57.1 in.).
The 2004 Toyota Avalon has double overhead cam (DOHC).
The 2004 Toyota Avalon is 5 ft. 11.7 in. (71.7 in.) wide.
The curb weight of the 2004 Toyota Avalon is 3417 lbs..
The 2004 Toyota Avalon has a drag coefficient of .28 Cd.
The 2004 Toyota Avalon runs on regular unleaded.