One of the reasons that nitrogen has become very popular in auto dealerships is that it can solve the issues of false TPMS alarms. TPMS alarms were mandated on all new vehicles starting in 2008, and are designed to alert the driver when the pressure in the tires varies 25% from the recommended set pressure.
Nitrogen is a huge advantage with TPMS systems for a couple of reasons. Nitrogen is very dry, minimizing moisture in the tire and ultimately benefiting the TPMS. Also, by retaining pressure longer, you will have fewer early AM alarms because of overnight temperature fluctuation. Dealers want the TPMS to function as intended, and nitrogen ensures that happens.
Here are some FAQ from Tire Warehouse about the benefits of Nitrogen & TPMS.