On top opf the engine - just follow the four ignition wires that lead into the engine block. Remove them and you wil see the top of the spark plug.
The 2004 Toyota Highlander has 16 valves.
The 2004 Toyota Highlander is a gas-powered vehicle.
The 2004 Toyota Highlander has an inline 4 engine.
The 2004 Toyota Highlander has a 4-speed automatic.
The 2004 Toyota Highlander is 15'5" long.
Every 100K or when necessary.
The 2004 Toyota Highlander runs on regular unleaded.
The 2004 Toyota Highlander has a 27 degrees angle of approach.
The 2004 Toyota Highlander has double overhead cam (DOHC).
The curb weight of the 2004 Toyota Highlander is 3520 lbs..
The maximum payload of the 2004 Toyota Highlander is 1840 lbs..
The 2004 Toyota Highlander is 15 ft. 4.6 in. (184.6 in.) long.