Working on both bodies, undo and remove the four screws and slide off the filter support.
Remove the upper plate.
Remove both bodies.
Upon refitting, replace the throttle body gasket with a new one of the same type.
Working on both bodies, undo and remove the two plate screws.
Remove the plate.
Working on both bodies, undo and remove the screw and detach the body.
Working on the body in question, remove the injector, slide off the clip and the injector itself.
Caution! Never undo the screws in the figure.