When replacing the vacuum pump does the transmission have to be taken out on 2006 Volkswagen Jetta

If I were to not change and just keep adding oil what's the worst that could happen

Asked by for the 2006 Volkswagen Jetta
First; According to Mitchell, you do not have to remove the transmission. Second; if you forgot or didn't take the time to service the pump, it could seize, and your brake pedal would lose the ability to ease your braking pressure in an emergency.