Old post, new member. I though I would give an update to those that are looking at block heater for our engines. As it is mentioned in the linked titan thread (see link above) the alternative plug that works for our engines is the 999M4-YA002. It is no longer available from Nissan, and instead they have you buy the heater separately and the cord separately for a total of nearly $150! Well, I found a place that still have the 999M4-YA002 part available and it is here: https://gspec.com/p-7306-block-heater-kit-20.aspx and it was $26 shipped!! Just ordered it.