How do you replace AC compressor on a Toyota 2000 sienna?

To replace the AC compressor on a 2000 Toyota Sienna, first, ensure the vehicle is safely elevated and disconnect the battery. Remove the refrigerant by taking it to a certified technician, then detach the serpentine belt and disconnect the electrical connectors and refrigerant lines from the compressor. Remove the bolts securing the compressor to the engine and replace it with the new unit, reattach everything in reverse order, and recharge the AC system with the appropriate refrigerant. Always consult a repair manual for specific torque specifications and procedures.