This is a close up of the side of the pedal housing. The silver circle in the middle is the pivot pin and around that you can see a brass bushing. It's not clear exactly what's causing these pedals to malfunction, but Toyota said over time this can wear down so that the pedal comes back to idle very slowly.
You can see the Toyota name stamped on the lower edge of this photo next to the word CTS. CTS Corporation is the company that built these pedals for Toyota. The white text on the left reads LHD -- meaning left-hand drive.