What is this called?

Thanks for sharing the photo.

See parts catalog Figure 87-14, Heating & Air Conditioning - Cooler Unit, for 2001 Prius cars.

The situation with Toyota’s English-language part names is a bit awkward: the parts catalog often uses slightly different names than the Repair Manual (more info) and other publications, and parts.toyota.com uses another set of names, some of which are just wrong.

You’re probably looking for one of two parts:

• Part Number 87106-47060
  87106H SERVO SUB-ASSY, DAMPER (FOR AIRMIX)
  (also called the HVAC Blend Door Actuator, air mix servomotor, or air mix control servo motor)

• Part Number 87106-20410
  87106J SERVO SUB-ASSY, DAMPER (FOR MODE)
  (also called the HVAC Air Inlet Door Actuator (incorrectly), air outlet servomotor, or air vent mode control servo motor)

The first part (87106-47060) may still be available from Toyota dealers, and the list price is $228.51. The second part (87106-20410) appears to have been discontinued. Both might still be for sale as used parts, of course.

 

I have often found that even in cases where the mothership parts.toyota.com shows a part as being discontinued, there will be individual dealer web sites that still show it. For example, just googling that part number, I find it on offer from Toyota of Fort Worth.

The thing I don't know, because I haven't tried to buy one, is whether that means they really have one available, or that their catalog just hasn't updated to show the discontinuation and they would say "oops" if you tried to order it.

 

That’s a good point: “This product is no longer available” seems to appear sometimes on parts.toyota.com even for parts that are still available but have sales restrictions or other special conditions. For 87106-20410, enough dealers show it as “discontinued” that I’m reasonably sure it’s so listed in Toyota’s current U.S. price file, but that doesn’t mean there aren’t any still in inventory.

We all speak in everyday language of a catalog, advertisement, or store display that offers something, but from a legal perspective, these aren’t offers to sell, which if accepted by customers would form binding contracts, but rather invitations to bargain, soliciting customers’ offers to buy, which the seller can accept or reject, subject to the laws about false advertising and some other exceptions. That’s important, because, as you mention...

Many dealers advertise every part for which Toyota lists a price, regardless of whether the dealer has any stock or a realistic prospect of getting it. A few dealers show their own “In Stock” status, but I don’t know of a publicly-available website that shows inventory at Toyota’s regional or national parts distribution centers.

If @Toygirl wants to buy a new part, I’d suggest a phone call or e-mail to a dealer parts department.