In terms of time it only takes a couple of minutes. The problem is monetary. They claim that when they swap out a part, it's sent back to Toyota for failure analysis and if it tests good, they don't get reimbursed for the part. I also asked if they would they could temporarily swap out the mirror and let me test it at night to see if that fixed the problem. I think it would only take me a few minutes to determine if there was a difference between the two. if there was no difference, then they could return it to stock. The dealer refused to do this, saying that they don't do troubleshooting like that. I also offered to drive both my TCH and Solara down so they could compare the mirrors in the two, but they said that would prove nothing. After that, they said they weren't going to do anything more about it.

I feel that this is a safety issue, so I called Toyota Customer Care to get them back on it. The dealer's service rep called me yesterday and we arranged to bring the car back next week at night for more testing. They said they would pull a new TCH from the lot so the mechanic and I could compare the mirrors in the two. I'll post an update afterwards.