Honda Ridgeline front side marker bulbs use 3457NA or 3357NA size, while rear side marker bulbs use 7443 size. The replacement chart covers 2006 through 2014 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 Honda Ridgeline front side marker position uses two distinct bulb types across its model years: the 3457NA for most years and the 3357NA for 2009 and 2013.
The 3457NA is a dual-filament T25 wedge bulb rated at 12V with a 27W main filament and a 7W secondary filament, featuring natural amber glass that produces a warm amber output without a separate amber lens or coating.
The 3357NA shares the same T25 wedge form factor and natural amber glass as the 3457NA but carries only a single filament rated at 27W, making it electrically incompatible as a direct substitute in positions that require dual-filament operation.
Both the 3457NA and 3357NA conform to ANSI standards recognized in the United States and Canada, placing them within a standardized sizing and performance framework common to North American automotive lighting.
The Honda Ridgeline rear side marker position uses the 7443 bulb uniformly across all model years from 2006-2014.
The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W main filament and a 5W secondary filament, and it also conforms to ANSI standards for the US and Canadian markets.
The T20 form factor of the 7443 differs from the T25 form factor of the 3457NA and 3357NA, meaning front and rear side marker bulbs on the Ridgeline are physically non-interchangeable between positions.
For the 2006-2008 and 2010-2012 front side marker positions, the Honda Ridgeline uses the 3457NA, while the 2009 and 2013 model years require the 3357NA, a distinction relevant to fitment when sourcing replacement bulbs for those specific years.