Hi guys,
Here we list all the bulbs size for 3rd gen 4Runner and set with the hyperlinks of Lasfit compatible LED bulbs. The LED bulbs are used to replace the OEM halogen bulbs. Have you replaced the stock halogen bulbs with LEDs or still keep OEM halogen bulbs?

1996~2002 4Runner bulb size guide:
1. Headlight: H4/9003
2. Fog light bulb size: H3
3. Front turn signal light bulb size
1999~2002 4Runner: 7440
1996~1998 4Runner: 1156
4. Rear turn signal light bulb size: 7440A(single filament bulb)
5. Rear Brake/Tail light bulb size: 7443R(dual filament bulb)
6. Backup light bulb size:
2001~2002 4Runner: 921/T15
1996~2000 4Runner: 7440
7. License plate light bulb size: 168/2825/T10
8. Trunk light bulb size: DE3175 (28mm festoon LED bulbs)
9. Interior dome light bulb size: DE3175(31mm festoon LED bulbs)

LASFIT
For Better Vehicle Life!

You forgot the marker bulbs for the front, 3rd brake light bulb, and license plate bulbs.

I replaced my brake lights to LED once and my cruise control stopped working.

Thanks for your reminder. 👍
The front side marker light and license plate light are the same bulb size, 2825/T10. We carry amber T10 LED bulbs for the front side marker lights and white T10 LED bulbs for license plate lights.
The 3rd brake light bulb size is 921/T15

I thought the 2001 and 2002 used a different brake light bulb....just thinking on when I had to change a bulb on my 2001 compared to my 2000...or maybe it was the turn signal, since the 2001-2 have a clear lense needing an amber bulb, where the earlier had colored lenses.
I could be wrong

Yes, the same bulb size with different lenses. The clear lenses need amber bulbs, white bulbs and amber bulbs both are ok for the colored lenses.

Just to add some information to this post. I just replaced the original H4/9003 headlight bulbs in my 2002 4Runner after 22 years. The OEM bulb has the following information stamped on it:

"KOITO JAPAN H4 60020 12V60/55W 37R (E4) 2CN DOT HB2"

I can find Koito bulbs on eBay, but that is about it. I ended up replacing them with Hella H4 bulbs.