New member here, been following this thread for a month or so now, and thought I'd chip in with my adventure with this issue.
Like so many others, my power back door (RX450h, 2010) decided to suddenly stop working - on Christmas Day, of all days! Nothing worked - door catch, dash switch, remote fob, nothing. Found this forum, checked/tried all the various suggestions to try to fix, no joy so looked like the only solution was motor/ECU unit replacement. I needed a fix soonest as my better half uses a mobility scooter, which is regularly carried in the rear boot area (dismantled), and so she's immobile without it!
As it happens, car was booked into Lexus garage for MOT last week anyway, so as I couldn't afford to wait any length of time I bit the bullet and asked them to investigate and fix the back door issue at the same time.
However, a heads up for anyone else in this situation - I was informed that they were unable to start the MOT if ANY door/boot/tailgate/whatever is unable to open. Something to do with full access being necessary - even showed me a gov.uk document (I think) indicating this fact. And, of course, this included the back door. I didn't know this?!
End result - MOT was scrapped, car re-booked in again for yesterday to firstly have power door fixed, then they could continue to do MOT. So, all's well that ends well, but I wish I'd been aware of the MOT thing before, I could have arranged the repair beforehand and saved myself a wasted 1st visit!
So - if you have an MOT due soon, get power back door fixed first!
