Harley-Davidson FXDLS Low Rider S Headlight Bulb Size
Harley-Davidson FXDLS Low Rider S headlight bulbs utilize a 9003 size for both high beam and low beam functions. The replacement chart covers 2016 to 2017 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments: one rated at 60W for high beam operation and one rated at 55W for low beam operation.
The 9003 operates on a 12-volt electrical system, which is standard for motorcycle applications.
The bulb uses a P43t base, a three-pronged bayonet-style mount that physically locks the bulb into the housing and ensures correct filament alignment.
The 9003 designation follows the ANSI standard used in the United States and Canada.
On the Harley-Davidson FXDLS Low Rider S, the 9003 bulb serves both the high beam and low beam headlight positions across the 2016-2017 model years.
Because the 9003 is a dual-filament type, a single bulb replacement addresses both beam functions simultaneously rather than requiring separate bulbs for each.
The 9003 and H4 bulbs share the same P43t base and dual-filament configuration, though they originate from different standardization bodies (ANSI and ECE respectively), and interchangeability between the two designations depends on the specific housing and connector design of the application.