When doing replacement or upgrading on 2006 – 2018 Ford Fusion with halogen capsule headlamps, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2006 – 2016 H11
High Beam Headlight 2006 – 2016 H7
Front Fog Light 2006 – 2016 H8/H11/H16
Back Up Light 2006 – 2016 921
Brake 2006 – 2009 4057
2010 – 2012 7443
Dome Light 2006 – 2012 578
Front Side Marker 2006 – 2012 194
Front Turn Signal 2006 – 2009, 2011 3357NA
2010, 2012 3457NA
2013 – 2016 PWY24WNAHTR
License Plate 2010 – 2012 12844
2013 – 2016 168
2006 – 2009 6418
Parking Light 2013 – 2016 168
2006 – 2012 3357NA
Rear Side Marker 2006 – 2009 194
Rear Turn Signal 2006 – 2009 4157
2010 – 2012 7443
Tail Light 2006 – 2009 4057
2010 – 2012 7443
Center High Mount Stop Light 2006 – 2009 921
Door Mirror Illumination Light 2010, 2012 12961
2006 – 2009, 2011 194
Glove Box 2006 – 2012 194
Trunk 2013 – 2016 194
2006 – 2012 211-2
Low Beam Headlight 2017 – 2018 H11
High Beam Headlight 2017 – 2018 H7
Front Fog Light 2017 – 2018 H8
Back Up Light 2017 – 2018 921
Front Turn Signal 2017 – 2018 PWY24WNAHTR
License Plate 2017 – 2018 168