Six Ford door lock cylinders compared by era: round-head, square…

Door Lock Cylinders

The plastic lever in the middle column is known to break.
F1LY-6321970-A ~$10
Au-Ve-Co 17118 (LH) 17119 (RH)

See TSB 95-24-04 Loose-Fitting Door Lock Cylinder
http://www.revbase.com/BBBMotor/
All '81-96 F-series & '83-96 Bronco replacement doors with minor diameter over 24mm use F6TZ-1521890-AA Door Lock Cylinder Spacer

The retainer clip for these is F58Z-1622023-AA (E9ZZ-6122023-A).

See also:
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Owner caption May 2009 · Photo 2466 of 6546