Originally Posted by IAmTheStig

Eh, I wouldn't worry too much about the plugs. Remember, the wrong O2 sensor is just reading slightly out of range on one side compared to the other. If anything the engine may try to adjust for the apparently rich condition by running a little leaner than usual. But overall I don't think you'll hurt anything else by driving it, just keep it below half throttle and below 3500 rpms to try not to put too high of a load on the engine while the fault is active. My concern right now with my car is more related to catalytic converter temps, not the plugs.

Judging from my past experience with the Nissan dealer, it will probably be at least a week, maybe two before the part will be in. Drive it easy till then.