Rodriguez's character, Letty, first appeared in 2001's "The Fast and the Furious."
"I hope they decide to show some love to the women of the franchise on the next one. Or I just might have to say goodbye to a loved franchise," she wrote. "It's been a good ride & I'm grateful for the opportunity the fans & studio have provided over the years... One Love."
Universal, the studio behind the franchise, did not immediately respond when contacted by ABC News for comment.
This is not the first time Rodriguez, 38, has criticized the films. In 2015, she told the Daily Beast that she argued against a love-triangle plot that she felt was unrealistic and advocated for her character to have a fight scene.
"I fought for the punch, because they didn’t think a girl would ever get involved,” she said.
Last year, Rodriguez told Entertainment Tonight that the films "need some more women on the good side."
"In order for me to be a part of the franchise in the future, they need to up the ante on the females," she said. "I just need some more feminine energy."