When doing replacement or upgrading on 2007 – 2012 Mazda CX-7 with capsule halogen headlamps HID, 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 – 2012 H7
High Beam Headlight 2007 – 2012 9005
Front Fog Light 2007 – 2012 H8/H11/H16
Back Up Light 2007 – 2012 7440
Brake 2007 – 2012 7443
Dome Light 2007 – 2012 DE3175
Front Side Marker 2007 – 2011 12961
2012 168
Front Turn Signal 2007 – 2011 1157
2012 7443NA
License Plate 2007 – 2011 12961
2012 168
Parking Light 2007 – 2011 1157
2012 7444NA
Rear Side Marker 2007 – 2011 12961
2012 168
Rear Turn Signal 2007 – 2012 7440NA
Tail Light 2007 – 2012 7443
Luggage Compartment 2007 – 2012 DE3175
Map Light 2007 – 2011 12961
2012 168
Low Beam Headlight 2007 – 2012 D2S
High Beam Headlight 2007 – 2012 9005
Front Fog Light 2007 – 2012 H8/H11/H16
Back Up Light 2007 – 2012 7440
Brake 2007 – 2012 7443
Dome Light 2007 – 2012 DE3175
Front Side Marker 2007 – 2011 12961
2012 168
Front Turn Signal 2007 – 2011 1157
2012 7443NA
License Plate 2007 – 2011 12961
2012 168
Parking Light 2007 – 2011 1157
2012 7444NA
Rear Side Marker 2007 – 2011 12961
2012 168
Rear Turn Signal 2007 – 2012 7440NA
Tail Light 2007 – 2012 7443
Luggage Compartment 2007 – 2012 DE3175
Map Light 2007 – 2011 12961
2012 168