The maskless Uber rider seen on video coughing on her driver and yanking his mask off finally surrendered to police ... and she's facing some serious charges.
According to the San Francisco PD ... Arna Kimiai turned herself in to authorities Sunday and was booked into the San Fran County jail that night.
She's been hit with charges of robbery, assault and battery, conspiracy and violation of health and safety code. She's still in police custody.
Cops say Arna and her friend, Malaysia King, got into a March 7 altercation with their Uber driver because they weren't wearing masks.
By now you've seen the video, which seems to back up what police say ... that Arna reached over the driver from the backseat and snatched his phone. The driver was also allegedly pepper-sprayed as the women left his car ... although we don't see that in the video.
King was arrested last week and is facing similar charges as Kimiai.
We broke the story ... along with these legal issues, Kimiai is also being sued for a 2019 car crash in which the other driver claims she was seriously injured.
Arna also filmed herself driving a sports car last summer speeds reaching 122 MPH on the highway.