How to change headlight on 1994 Nissa Altima?

The bulb is accessible from the rear of the headlight housing. Sometimes you can leave the housing on, and sometimes you have to remove it. Since this is an older Altima, all you need to do is twist the locking ring, or remove the retaining spring from the bulb and withdraw it from the housing. Never touch the glass on the bulb as it will crack. If you do clean it with rubbing alcohol. Hope this helps.