For the 2016 Acura MDX, both the low-beam and high-beam headlights use integrated LED lighting. The fog lights, daytime running lights, center stop light, license plate lights, rear side markers, tail lights, dome light, map lights, and door-mirror lights are also listed as LED, so no replaceable bulb size is provided for those positions.
For replaceable exterior bulbs, the front turn signals, parking lights, and front side markers use 7444NA bulbs. The rear turn signals and reverse lights use 7440, while the brake lights use 7440R. Interior applications include DE3022 for the step light, 2721 for the glove-box light, and 158 for the interior light.
The floor lighting requires comparison with the original bulb: it may use 2721 or 74. The trunk light may use 168 or 917, and the vanity light uses 6615F. Verify the original bulb where an option is listed before ordering.