Does a sc400 iacv fit on the sc300???
 

I found 6 sc400 in a local junk yard a few miles away and am looking for a replacement iacv and if it'll work I'll go pick it up. I just ordered a new plug and harness from Lexus so that should solve my connection issue.

Or does anyone else know of another car that shares the same iacv?????

may or may not bolt up as its built in on the sc300 and not on the 400 (probably won't)
you can try swapping the top half the black plastic round part, but usually they have different screw hole patterns on different models.

move to proper forum

Sc400 one has 3 bolts that hold it in place, and the sc300 has 2 bolts........but Im wondering if the assembly comes apart and will fit in the sc300 housing.....

the sc300 housing is built into the throttle body, if the top black plastic piece has a different bolt pattern, its probably not going to work. the easiest bet will be finding one from a sc300.

Is there another car that shares the same iacv?

early model non-vvti gs300's (92-97?) and non-vvti mk4 supra non-turbo (94-97?).
as you can imagine the gs300 is easier to find for parts at the junkyard.

I would guess that the first gen LShas the same as well

he actually has a sc300, so the LS400 one won't work. The LS400 one would work on a SC400 though.

Oh my bad. Still drugged with morphine. (Broke leg)
It happens... :)