If you have instrument cluster, speedometer problems aka "combination meter" and you are past the 9 year free dealer warranty period, this is how you or your buddy can remove it DIY. Search Ebay for Prius instrument cluster repair. There are also rebuilt ones from Dorman, but I've had a couple crap out.
This video is amazing. So helpful for not only the combination meter but everything dash related. Such a great resource, I've bookmarked this!!