Blac Chyna Sued: Your Friend, Your Car, Your Problem

Blac Chyna sent a woman to the hospital ... at least according to a woman who has now filed suit against the the future Mrs. Kardashian.

TMZ broke the story ... Chyna's friend, Paige Addison, was tooling around in Chyna's BMW back in November when she blew a stop sign and slammed into an SUV and injured 2 people inside. The lawsuit claims Chyna should've known Paige was a bad driver and should never have let her take the wheel.

Paige was charged with felony hit-and-run.

The people in the SUV want medical expenses, lost wages and other damages.

We've reached out to Chyna ... so far, no word back.