The actress was pulled over twice outside the Burbank Bob Hope Airport Sept. 16 -- the two stops coming 90 minutes apart. When police ran her license, they discovered it was suspended due to several alleged motor-vehicle violations over the past several months.
Her car was impounded following the second stop.
Bynes' agent, publicist and entertainment lawyer announced this week they no longer work for her. TMZ said the representatives -- whose names were no reported -- dropped Bynes as a client after she stopped meeting with them and taking their calls.
In addition to the suspended license charges, Bynes, 26, faces two counts of hit-and-run and a DUI charge related to separate collisions in April and August, Los Angeles prosecutors said.
The actress faces as much as a year in jail if convicted on both hit-and-run counts, and each suspended license count carries a maximum of six months in jail.
Bynes is best known for her work in the films "Hairspray" and "What a Girl Wants," as well as TV's "The Amanda Show" and "What I Like About You."