While I can't tell a "km" from a "pm", I think I agree that at speeds over 70MPH, I'm also seeing vibration with the replaced mirror base. I'm starting to wonder if the replacement part was any different from the original. The TSB claims a "different shape", but it looks 100% identical to my eyes. Perhaps a mixup with part numbers?highway speeds over 100km and vibration is just as bad as it was before.... whats the point of a TSB if it doesn't fix anything.