We broke the story ... the LAPD launched an investigation after a woman filed a report claiming the rapper smashed into her ride on Wednesday after a music video shoot and then fled the scene.

Now, sources say Wiz actually hit 2 cars ... including a Lexus, which sustained serious damage to the front end.

One source who was at the scene tells us the Chevy was leaving the video shoot when the driver punched the gas and lost control ... slamming into the Lexus, which caromed into another car.

As we previously reported, the women in the 3rd car claims Wiz fled from the scene -- she has since filed a hit-and-run report with police.