Ugh. Well, by my score keeping, the tires on the Highlander are up on me 3-to-zip.
I purchased a tool for removing stripped lug nuts to try and get them to come off. The tool has a reversed thread so that turning it in the direction that would loosen the lug nut actually should pull the tool further onto the lug nut itself. In theory that is. In reality, I think the tool needs something reasonably flat to fall against. The keyed lugnuts are perfectly round so there’s nothing to bite into, therefore no leverage to turn the nut.
Since that keyed lug nut had sheared, I figured perhaps I could cause it to break by whacking it with a cold chisel. No go. The chisel edge is blunted and the lug nut remains.
I was hoping to avoid the trip to the garage, but it’s starting to look unavoidable.