They would work, except they would trip the computer into thinking there's a problem with that circut.
Example: I installed 48LED White Bulb for my front turn signal's, the light's work and flash, however since led's don't have a filament, the computer thinks the circut is open and displays a message as well as flashing the light bulb quickly.
Installer a 1 OHM resistor in the circut and all should be fine...I haven't gotten around to doing it yet.