When doing replacement or upgrading on 2007 – 2018 Lincoln MKX auto-leveling capsule H/L halogen headlamps HID with, 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 – 2010 H11
High Beam Headlight 2007 – 2010 9005
Front Fog Light 2007 – 2010 H8/H11/H16
Brake 2007 – 2010 4057
Dome Light 2007 – 2010 578
Front Side Marker 2007 – 2010 168
Front Turn Signal 2007 – 2010 3157NA
License Plate 2007 – 2010 6418
Parking Light 2007 – 2010 3157
Rear Side Marker 2007 – 2010 194
Rear Turn Signal 2007 – 2010 4157
Tail Light 2007 – 2010 4057
Luggage Compartment 2007 – 2010 211-2
Center High Mount Stop Light 2007 12961
Map Light 2007, 2009 – 2010 168
2008 194
High Beam and Low Beam Headlight 2011 – 2015 9012
Front Fog Light 2011 – 2015 H8/H11/H16
Back Up Light 2011 – 2015 921
Dome Light 2011 – 2015 211-2
Front Turn Signal 2011 – 2015 3457NA
License Plate 2011 – 2015 6418
Parking Light 2011 – 2015 3457
Luggage Compartment 2011 – 2015 578
Map Light 2011 – 2015 12961
High Beam and Low Beam Headlight 2011 – 2018 D3S
Front Fog Light 2011 – 2015 H8/H11/H16
Back Up Light 2011 – 2015 921
Dome Light 2011 – 2015 211-2
Front Turn Signal 2011 – 2015 3457NA
2016 – 2018 7444NA
License Plate 2011 – 2015 6418
Parking Light 2011 – 2015 3457
Luggage Compartment 2011 – 2015 578
Map Light 2011 – 2015 12961
High Beam and Low Beam Headlight 2016 – 2018 D3S
Front Turn Signal 2016 – 2018 7440NA