NEW YORK--(BUSINESS WIRE)--Fitch Ratings assigns the following ratings and Rating Outlooks to the notes issued by Nissan Auto Receivables 2015-B Owner Trust listed below: --$270,000,000 class A-1 'F1+sf'; --$200,000,000 class A-2a 'AAAsf'; Outlook Stable; --$290,000,000 class A-2b 'AAAsf'; Outlook Stable; --$410,000,000 class A-3 'AAAsf'; Outlook Stable; --$132,710,000 class A-4 'AAAsf'; Outlook Stable. KEY RATING DRIVERS Consistent Collateral Pool: The collateral composition and credit quality