The Acura MDX side marker uses a 168 bulb size for the exterior lighting system. Data for the specific component covers the period from 2007 through 2013.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 168 bulb is the most frequently specified size across the Acura MDX side marker positions, appearing in the front side marker from 2001-2013 and the rear side marker from 2007-2013.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, conforming to the ANSI standard used in the United States and Canada.
The 194 bulb shares the same T10 miniature wedge form factor as the 168 but draws slightly less power at 3.78W versus 4.9W, making the two physically similar yet electrically distinct.
The 7443NA and 7444NA are both T20 dual-filament wedge bulbs with natural amber glass, each rated at 12V with a 21W main filament and a 5W secondary filament.
The natural amber glass on the 7443NA and 7444NA produces a colored output directly from the bulb itself, without relying on a tinted lens to achieve the amber appearance required for side marker functions.
The Acura MDX front side marker uses the 7443NA for the 2015-2016 model years, the 7444NA for 2014, and the 168 for 2001-2013, indicating that three distinct bulb types are specified across the front position alone.
The 7443NA and 7444NA share the same voltage, wattage, glass type, and T20 wedge base, yet they carry different ANSI designations, which signals a fitment distinction that makes them non-interchangeable despite their near-identical specifications.
The rear side marker position on the Acura MDX transitioned from the 194 bulb in 2001-2006 to the 168 bulb in 2007-2013, representing a change in wattage from 3.78W to 4.9W at that position.
All four bulb types in these specifications conform to the ANSI standard, meaning they follow a standardized sizing and base configuration recognized across the United States and Canada.
The T10 wedge base shared by the 168 and 194 is physically smaller than the T20 wedge base used by the 7443NA and 7444NA, so bulbs from these two groups are not interchangeable regardless of voltage compatibility.