I recently bought a 2004 LS430 and was wondering if the passenger side temperature control button is lighted at night. My driver side is but passenger side is not. Thanks.

Yes. My 04 LS430 lights up on both sides.

my driver side is not lit, while passenger is. Oh well.

both sides should be lit.

Buy a new bulb and replace it inside the switch, it's easy.

my passenger side one isn't lit. Lexus wanted like 350 to take apart the dash and put a new light bulb in. whatever!!! isn't there a cheaper way to fix it??

$350?!?!?!?!? #%+^*}!!!!!! The bulb is just a few dollars. Use a wide spade-type tool like a spatula or something to pry out the switch, don't damage the soft part of the dash. It easily comes out. Then replace the bulb and push the switchback in place. Takes 5 minutes tops.

Can anyone point us to this bulb?

90010-03043 is the correct part no for this bulb assy (bulb, mounted and with green cap). it twists out and twists in.