For the 2011 Mazda CX-9, the high-beam headlight uses a 9005 bulb. Low-beam fitment depends on the headlight system: models with halogen headlights use H11, while models with HID headlights use D2S. Confirm the headlight type before ordering a low-beam replacement.
Front and rear turn signals use amber 7440A bulbs. Reverse lights use 7440. The brake lights, center stop light, and tail lights are listed as LED, so these assemblies do not use a conventional replaceable bulb according to the supplied fitment data.
Several smaller lights have alternate listed sizes. License plate, parking, rear side-marker, and courtesy lights use either 2825 or 98. The front side marker uses 2827. Interior dome, map, and trunk lights use DE3175. No fog-light bulb fitment is listed for this model year.