The Acura MDX parking light utilizes bulb sizes 7443NA, 168, and 3457 depending on the specific version of the vehicle. Data for the provided components covers the range from 2001 through 2016.
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 front parking light application, covering model years 2001-2002, 2007-2013, with the exception of a few years that use different bulb types.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, making it a low-wattage single-filament lamp suited for parking light duty rather than primary illumination.
The 7443NA is a T20 dual-filament wedge bulb rated at 12V with a 21W high filament and a 5W low filament, and its natural amber glass produces a yellow-tinted output without requiring a separate amber lens or coating.
The Acura MDX (2014-2016) uses the 7443NA, which is physically and electrically distinct from the 168 used in earlier model years, meaning the two types are not interchangeable despite both being wedge-base designs.
The 3457 is a T25 dual-filament wedge bulb rated at 12V with a 27W high filament and a 7W low filament, representing the highest wattage of the three bulb types specified across this application.
The Acura MDX (2004-2006) uses the 3457, which operates at a notably higher wattage than both the 168 and the 7443NA, and substituting a lower-wattage bulb in its place would not meet the original electrical specification.
All three bulb types, the 168, 7443NA, and 3457, conform to ANSI standards applicable in both the United States and Canada, indicating a shared regulatory framework for their rated performance values.
The T10, T20, and T25 designations refer to the outer envelope width of each bulb in eighths of an inch, so the physical size increases progressively across the three types, which affects socket fitment.
The dual-filament design of the 7443NA and 3457 allows a single bulb to serve two brightness levels within one housing, a function the single-filament 168 cannot replicate.
A model year 2013 MDX is listed under both the 168 specification group and a separate data set also showing 168, confirming consistent bulb sizing for that year across both data entries.