The bulb for gear panel is: T5

Here is the Procedure:

First, remove just the bottom V panel.

Gently remove the casing by lifting it up the clip.

Toyota Vios Casing Removal

Switch your gear to ‘N’, you don’t need to start your car with this. If you don’t know how, press and hold around the button as shown and switch your gear to ‘N’.

Pull up clip by clip, don’t force it else the clip will be damaged; there are about 4 clips in just about every corner, lift up 1 by 1.

Remove all 4 clips from the circle. Here’s the trick, the reason why I put to ‘N’ gear is always to allow me to eliminate the front panel easily. Steps are as follows,

Remove clips > shift to ‘N’ or ‘D’ > pull up the top panel up > shift to ‘R’ or remain as ‘N’ > pull the rear panel up

This procedure may be a tough job but once you understand the way it is installed, you can remove it in seconds.

When the gear panel is removed, it is possible to spot the bulb. Pull it and replace it. If you can’t pull it, try using a plier and clip it all out carefully, don’t break the bulb.

Test them out, turn on your vehicle light can do.