Does anyone know if replacement bulbs for the 92-95 4runners fit all second gen(90-91 too)?

 

If you are talking about the bulbs themselves, then no. The 90-91 uses a regular sealed beam (I think). The 92-95 are composite lamps and take a 9004 bulb. If you wanted to change the whole lamp assembly, then you'd likely have to change your grille and maybe corner lamps also. The sheet metal underneath that holds everything should be the same (don't quote me). See if you can find a 92-95 and do a visual and take a few measurements. Hope that helped.