How do you replace the catalytic converter on a 2002 Lexus IS300?

To replace the catalytic converter on a 2002 Lexus IS300, first, safely lift and secure the vehicle. Disconnect the negative battery terminal, then remove the exhaust pipes connected to the catalytic converter using appropriate tools, such as a socket set. Unbolt the old catalytic converter from its mounting points and replace it with the new one, ensuring all gaskets are in good condition. Reassemble everything by reversing the disassembly steps, and reconnect the battery before starting the vehicle to check for leaks.