The Altima and Sentra would take the fall first as they're Nissan's volume models. Hitachi's delay has already interrupted production in Japan, but thus far the issue has only involved 15,000 units. A U.S. and Mexico plant stoppage of two company staples would bite more deeply into Nissan's combined 1.2-million-unit production capacity. It's suspected that Subaru and perhaps Honda are also affected by the ECU delay.
[Source: Automotive News – Sub. Req.]