For the 2011 Acura RDX, the low-beam headlight uses a D2S bulb, while the high beam uses a 9005. The daytime running light also uses 9005, making it important to select the correct position when ordering replacements. The fog-light fitment is listed with two options: H11 LED and H16 LED.
Other useful exterior bulb sizes include 1157A for the front turn signal and parking light, 7440 for the rear turn signal and reverse light, and 7443R for the brake and tail-light applications. The center stop light uses 921. Front and rear side markers use 168NA.
- License plate and some tail or trunk-light applications: 168 or 917
- Dome light: DE3175
- Map light: 2825 or 98
- Vanity light: 24
For the floor and glove-box lights, compare the original bulb before ordering: the listed options are 2721 or 74. Interior applications also include 194 and 7441.