When doing replacement or upgrading on 1978 – 2018 Ford Fiesta Sedan Hatchback, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight2014 – 2018 H11
2011 – 2013 H11B
High Beam Headlight2011 – 2013 9005
2014 – 2018 H1
High Beam and Low Beam Headlight1978 – 1980 6014
Front Fog Light2011 – 2013 H8/H11/H16
Back Up Light1978 – 1980 1156
2011 – 2013 3157
2011 – 2018 921
Brake1978 – 1980 1156
2011 – 2018 3157
Dome Light2011 – 2018 194
1979 – 1980 97
Front Side Marker2011 – 2018 168
1978 – 1980 194
Front Turn Signal1978 – 1980 1157
2011 – 2018 3157NA
License Plate2011 – 2018 12961
1978 – 1980 1816
Parking Light1978 – 1980 1157
2011 – 2013 3157
2011 – 2018 3157NA
Rear Side Marker1978 – 1980 194
2011 – 2018 3157
Rear Turn Signal1978 – 1980 1156
2011 – 2018 3157
Tail Light2011 – 2018 3157
1978 – 1980 97
Center High Mount Stop Light2011 – 2013 12961
Glove Box1979 – 1980 194
Map Light2011 – 2018 12961
Trunk2011 – 2018 194