Turn ignition switch off.
Disconnet the fuel inlet tube quick-connector (A) and the fuel outlet tube quick-connector (B).
Disconnect the thermostat connector (A), the water sensor connector (B) and the heater connector (C).
Cover the hose connection with the shop towel to prevent splashing of fuel caused by residual pressure in the fuel line.
Unscrew the two mounting nuts and remove the fuel filter (D).
Install the fuel filter according to the reverse order of "REMOVAL" procedure.