Do I need to disconnect the battery to change the indicator stalk on an 2004 Ford Focus?

Need to change a faulty Indicator stalk on my 04 Ford Focus. Anyone know if I have to disconnect the battery beforehand please? - is their a risk that the airbag might go off if I don't?

Yes. For good measure, remove the transmission and the fuel tank.

Yes, yank off the negative terminal, or live with any induced problems.