I just did my wife's inverter coolant pump at 127,000 miles without any issues. I was going to have the dealer do it, but that means scheduling an appointment, leaving it for a day, trusting them not to mess anything else up while they're in there, etc...easier to do it myself on my own schedule. It took under two hours including fiddling with the bleeder and a drive around the block. It's a tight space to work in but not the worst I have experienced. My hands only hurt a little. Fingers crossed that I really got all the air out. Wife has instructions to pull over and shut it down if she sees the triangle of death, just in case.