I found this info. posted by another....

For anybody looking for TPS 89452-35030 4 pin, you can get them at Discount Auto Parts Online -- PartsGeek.com - Domestic & Import Car Parts Warehouse they are about $ 65.00 OEM made by Aisan in Japan.
I had an iddle problem with my 2002 4Runner, Installed this part and now the iddle is just perfect:

I believe my 4Runner is cable driven? We just replaced throttle cable and transmission cable. The 4Runner is running terribly after these cable replacements. Surging at idle and hesitation when pressing gas pedal

Are you sure you have an 01? Sounds like you have a 2000 then.

The cable should not have any slack or play, but the throttle valve needs to be shut 100% when you let off the gas. Is it routed correctly and not being pinched?

You replaced the transmission cable though? I wasn't aware that 2000 have a transmission kick-down cable. Are you sure it wasn't the cruise control cable?

2000 have kickdown cables 2001 and 2002 did not.

Thanks for the clarification. Hard to keep straight all the changed over the years, photos go a long way in this case! I've owned a 2002, 1998 and 1999 model years so a bit of a gap in my mind for 2000 models.

so what are the results..

I ordered an entire TB from Toyota here (mcgeorge toyota):

Toyota Parts | Toyota Online Parts | Genuine Toyota Parts | Toyota Parts Online

Throttle Body 22030-62020 1 $627.40

A little more palatable than $1100. My 2002 has 250k miles...was throwing both IAC and TPS codes. Both are integrated into the TB. I am annoyed it's so much...but heck...I got 17 worry free years out of the old one.

-Mike

Glad you got a break on the price

First off thank you for posting this thread! I now have a new TPS on the way for my 2001 4Runner and I did not have shell out $650 for a new TB! Question: when you replaced your TPS was it just plug and play? I haven't been able to find any instructions so far.

Thanks in advance!

I purchased the TPS from partsgeek linked above planned on changing during TB job and other under hood maint. I do not have any TPS codes.
The two holes for TPS mounting are slotted on one is use and new one. Mounting screws on one in use has yellow marking paint on them, along with one other adjustable screw near TPS on Thottle body. I'm assuming these markings are proof marks showing TPS has been tuned to thottle plate position good for installation on vehicle.
As I see it, we are going to have to figure out the tuning process for this to be a successful swap. Be it trial and error throw it on adjust as needed or use a meter reading ohms of one in use replicate those readings with new one. This I do not see as being a plug n play thing, if position was not important slotted holes would not be needed. Putting TPS on back burner till I think on this a bit more.
Good Luck to anyone doing this swap, post up what happens.
01 5VZ-FE 216k miles.

I don't have any instructions on replacing it but I would scribe on the original TPS and then use those marks as a reference/starting point also you could use marks if you need to put it back. A picture won't hurt either. I ended up finding a throttle body it sit on the shelf waiting to go to work.

Scribing the outline of TPS on TB had crossed my mind for reference point also. Having worked with encoders no two are the same, Using scribe marks and meter I'm thinking should be very close if not spot on.