Maybe they’re refering to the sway stabilizer links ? I guess one could call them pins as well. ( especially on small cars ) A sway stabilizer is a steel bar about an inch thick that reaches accross from right side to left under the front suspension. It’s usually bent in several places and is then attached at its outer ends to the arms with bolts and bushings ( aka, links ). When the car rocks side to side this bar is the spring that catches and cotrols that force. It’s those bolts and bushings at the outer ends that may be called pins.
If they’re talking brake parts, they might mean the slide pins that the pads slip on or the pins the caliper slides on ( I’m unfamiliar with the Scion setup ).
In either case I can envision “pins” in there, yes.
Their words “stabilizer pins” leads me to think the sway stabilizer links.
In my business we don’t split hairs about correct terminology as we hear numerous, and humerous, names and descriptions of various car parts. We show them a picture and have them point it out or describe what it does or should do.
Perhaps they could point them out to YOU. A good shop will, even to a novice.
You may not already know which parts are which but you’ll find it pretty easy to research.
In addition to them telling you they need replaced, also ask them “Why”. Again, a good shop will tell you.
This is how my daughter began her mechanical abilities. Even as a kid during father-daughter project days she was all questions.
You can even visit a parts place like O’Reilly’s or Auto Zone and get a parts breakdown picture, part numbers and prices to help self educate.