I swapped my stock bulbs for LEDs a while back. My 4Runner is a 2007 Sport. The following information may be helpful but I make no guarantees and your experience may vary:
- Take the opportunity to clean all the lenses inside and out while they're off. It can make a surprisingly big difference in brightness.
- Polarity matters with LEDs, so if a bulb doesn't work, remove it, rotate it 180 degrees and plug it back in.
- Turn the switches on the dome and cargo lights to OFF while you put in the bulb. I didn't and blew the fuse.
- The door panel light housings can be gently pried out with a small flathead screwdriver. Once the housing is out, the lens is easy to pop off. But for the dome and cargo lights, put the screwdriver blade between the lens and the housing and gently pop off the lens only. The whole housing doesn't come out.
- Once the lens is off, the best way I found to install the dome and cargo bulbs was to gently grab one of the metal ends with needlenose pliers, put the other end up into the socket, then push the end you're holding up into place.
Hope that saves somebody some aggravation.