Jessica Steindorff filed the lawsuit Monday in Los Angeles, seeking unspecified damages. Her lawsuit uses both names for the 65-year-old Jenner, who publicly transitioned to Caitlyn after the crash.
Steindorff's complaint does not detail her injuries or provide any new details about the Feb. 7 crash. The collision killed a woman, Kim Howe, after the SUV Jenner was driving pushed her car into oncoming traffic.
Howe's stepchildren have also sued Jenner, who is seeking a dismissal of their case.
Jenner's publicist Alan Nierob declined comment on Steindorff's lawsuit.
The lawsuit was first reported Monday by celebrity website TMZ.