How do you replace a radiator on a 1999 Infiniti G20?

To replace the radiator on a 1999 Infiniti G20, start by draining the coolant from the system. Disconnect the negative battery terminal, remove the upper and lower radiator hoses, and detach the transmission cooler lines if applicable. Remove any mounting bolts holding the radiator in place, then carefully lift it out of the engine bay. Install the new radiator by reversing the removal steps, ensuring all connections are secure, and refill the coolant before testing for leaks.