Insurance benefits are being cut, the pension has been frozen, wages have been stagnant, and Nissan has a two-tiered work force with about half of them provided by an outside contractor who is paying their staff about half of what Nissan pays their people. Those are the primary beefs with the Nissan workforce that I've read about.
Best way to keep out a union is to keep your workforce happy.
There is only so much they can do. Every business is having the same issues with insurance.
Wages have been stagnant but so have sales and profits. If the unions come in, they will have to raise prices. This would hurt sales. Hyundai is currently down 19.4%. A union certainly wouldn’t fix their problems.
If the union comes in, Nissan should try to greatly increase the outside contractors. Most of the Nissan employees aren’t highly skilled workers so they should be happy with what they’re getting.