How do you replace ac compressor on Infiniti q45?

To replace the AC compressor on an Infiniti Q45, first, disconnect the battery and recover the refrigerant using a certified recovery machine. Next, remove the serpentine belt and disconnect the AC lines from the compressor, taking care to cap the lines to prevent contamination. Unbolt the old compressor from its mounting bracket and install the new unit, ensuring it is properly aligned. Finally, reconnect the AC lines, replace the serpentine belt, recharge the system with refrigerant, and test the AC operation.