F1 Pole Position 64 cheats and cheat codes for Nintendo 64

Select another engine:
Win 1st place on the World Grand Prix Champion then save. Start
again the game and highlight a driver at the character selection menu.
Hit Right C or Left-C to select another engine.

Infinite fuel:
Choose the Grand Prix mode and modify the fuel setting option
to 10%.

Unlock secret cars:
Win 1st place on the World Grand Prix Champion then save. Start again
the game and hold A + B when you see "Please wait while loading"
message on the screen.