Do you need a special wrench to remove oxygen sensor on 2001 Toyota Tundra?

Yes, you will need a special wrench to remove the oxygen sensor on a 2001 Toyota Tundra. The oxygen sensor is located in the exhaust pipe, and it is held in place by a special nut that can only be removed with a special wrench. This wrench is called an oxygen sensor wrench, and it is available at most auto parts stores.