Fuel Injector problems of the 2007 Nissan Sentra

Tl contact owns a 2007 Nissan Sentra. The contact stated when attempting to start the vehicle, the ignition would turn over but the engine would not start. After a few attempts, the vehicle started. The failure would occur intermittently without warning. The dealer advised the failure could have been caused by a malfunction in the fuel pump injector. The vehicle was not yet repaired. The failure mileage was 30,402 and the current mileage was 30,498.