It should. I don't believe they changed anything major between 1999 and 2000.
I found out, it's around 210F.
If its the front turn signal you open your hood and partly remove the black plastic cover on top of your headlights. Then you should see a screw on that screws on your signal light. Remove the screw and take off the the signal light and then remove the bulb.
Unfortunately, the 2002 es300 was the first year that Lexus did not use a IACV in the ES300.
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