When doing replacement or upgrading on 2007 – 2018 Mazda CX-9 with adaptive capsule halogen headlamps HID lighting without, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2007 – 2015 H11
High Beam Headlight 2007 – 2015 9005
Front Fog Light 2007 – 2012 9006
2013 – 2015 H8/H11/H16
Back Up Light 2007 – 2012 7440
2013 – 2015 921
Brake 2013 – 2015 7443
Daytime Running Light 2013 – 2015 9005
Dome Light 2007 – 2015 DE3175
Front Side Marker 2007 – 2015 12396NA
Front Turn Signal 2007 – 2009 1156NA
2010 – 2015 7440NA
License Plate 2013 – 2015 12961
2007 – 2012 194
Parking Light 2007 – 2009 12396NA
2013 – 2015 12961
2010 – 2012 194
Rear Side Marker 2007 – 2015 12961
Rear Turn Signal 2007 – 2015 7440NA
Luggage Compartment 2007 – 2015 DE3175
Courtesy 2007 – 2015 12961
Inner Tail Light 2013 – 2015 194
Interior Door 2013 – 2015 194
Map Light 2007 – 2015 DE3175
Outer Tail Light 2013 – 2015 7443
Low Beam Headlight 2007 – 2012 D2S
High Beam Headlight 2007 – 2012 9005
High Beam and Low Beam Headlight 2013 – 2015 D4S
Front Fog Light 2007 – 2012 9006
2013 – 2015 H8/H11/H16
Back Up Light 2007 – 2012 7440
2013 – 2015 921
Brake 2013 – 2015 7443
Dome Light 2007 – 2015 DE3175
Front Side Marker 2007 – 2015 12396NA
Front Turn Signal 2007 – 2009 1156NA
2010 – 2015 7440NA
License Plate 2013 – 2015 12961
2007 – 2012 194
Parking Light 2007 – 2009 12396NA
2010 – 2012 194
Rear Side Marker 2007 – 2015 12961
Rear Turn Signal 2007 – 2015 7440NA
Luggage Compartment 2007 – 2015 DE3175
Courtesy 2013 – 2015 12961
2007 – 2012 194
Inner Tail Light 2013 – 2015 194
Interior Door 2013 – 2015 194
Map Light 2007 – 2015 DE3175
Outer Tail Light 2013 – 2015 7443
Back Up Light 2016 – 2018 921
Dome Light 2016 – 2018 DE3175
Front Side Marker 2016 – 2018 12396NA
Front Turn Signal 2016 – 2018 7440NA
License Plate 2016 – 2018 194
Parking Light 2016 – 2018 12396NA
Rear Turn Signal 2016 – 2018 7440NA
Luggage Compartment 2016 – 2018 DE3175
Map Light 2016 – 2018 DE3175