09 corrolla air outlet selection dial bulbs burnt . How to replace.

Dismantle them. HVAC controls, right?
if the bulbs cant come out, then... buy new ones at toy.?
lets work that....
allcars,
you can see parts on line, ever do that>?
there are 9 corolla, in 2009
no idea yours, but you can look, self.
at random i pick
base model.
then
HVAC
https://parts.olathetoyota.com/2009toyotacorollaparts.html

then. nada. just a 421 buck control
so call them and ask?
WHAT I DO:
or dismantle yours, look at it, if they come out they do
if they dont they don't. its that simple
if they do come out, my sick mind looks and says.
can i find sub min, size led here? yes? bingo.
i upgrade many things to LED now., (but can be tricky)

i upgrade an old Tek Oscillisope last week to led. nice upgrade.

on cars, this has a dimmer circuit and may not work with LEDs.
but will work if you don't change them all, up to 20 lamps in car.
see why,? because the dimmers fail with almost no current.
led have 10x less current flow.
you can also by grain of wheat lamps. and put them in.
14v lamps.
mouser.com has em, or even radio scratch.
first dismantle, learn what you have.

or call toy and ask, i bet they say no.