How do you replace knock sensors on a 2000 Toyota Avalon?

To replace the knock sensors on a 2000 Toyota Avalon, first disconnect the negative battery terminal to prevent electrical issues. Then, remove the intake manifold to access the knock sensors located on the engine block. Disconnect the wiring harness from the old sensors, unscrew them, and install the new sensors, ensuring they are properly torqued. Finally, reassemble the intake manifold, reconnect the battery, and check for any error codes.