How do you change the transmission module on a 1999 Lexus es 300?

To change the transmission module on a 1999 Lexus ES 300, first disconnect the battery to ensure safety. Then, locate the transmission control module (TCM), which is typically found under the dashboard or near the transmission. Remove any necessary panels to access the TCM, disconnect the wiring harness, and unbolt the module. Finally, replace it with the new module, reconnect the wiring, and reassemble any panels before reconnecting the battery.