How do you change the AC belt on a 2003 infinity G35?

To change the AC belt on a 2003 Infiniti G35, first, disconnect the negative battery terminal for safety. Then, locate the AC compressor and use a wrench to relieve tension on the serpentine belt tensioner, allowing you to remove the old belt. Install the new belt by routing it according to the belt diagram usually found on a sticker in the engine bay, and then release the tensioner to secure the belt in place. Finally, reconnect the battery and check the installation by running the engine briefly.