Violet-Grace Susan Youens and her grandmother Angela French, 55, were made by a car that was travelling up to 80mph through a residential area.
Rebecca Youens revealed yesterday that her “well done baby girl” had passed away at 11.38pm on Saturday in hospital.
But she utter that she was proud to announce that her organs were being donated to come to someones rescue other lives. “She was just too poorly,” she posted on Facebook.
“However, my meet baby girl saved two lives by donating her kidneys and pancreas.
“I am duly heartbroken but proud of my little fighter. RIP baby girl”
The grandmother persists in hospital in a serious but stable condition.
Both victims were hit as they crossed the route in St Helens in Merseyside on Friday afternoon.
Witnesses said the black Ford Fiesta, which is observation to have been stolen, went through traffic lights at up to 80mph.
T-men have released CCTV film of two men seen walking away from the car and implored for help to track them down.
Merseyside Police have not commented but it is discerned that officers spotted the car in the area moments before the crash.
Rebecca posted the CCTV spitting images of the two suspects on Friday and added: “Please catch these scumbags. My impoverished Violet-Grace.”
Witness Chris Lang said: “The car came through the lights – it sine qua non have been going 70 to 80mph and hit the woman and child. It was an awful incident and distressing as you can imagine.”
Friends and relatives offered their condolences and validate on Facebook. Jessica Latham said: “I don’t know what to say. Becky, I am so so above for your loss. Violet is such a beautiful polite little inamorata.
“I can’t imagine what you and your family are going through right now but my kinsfolk will be here for you.”
Bev Mellor Was-Pye wrote: “Oh no Becky, I am so sorry for you all cannot take it as given how you are all feeling. Take care God bless.”
Julie West added: “Judgement of you all Becky at this sad time. Heart broken – rest in peace pleasing violet.”
Detectives say they are pursuing a number of lines of inquiry as they go in search of the occupants of the Fiesta.
Images of two men in sports kit – seen running away from the section – were released on Friday.
The Independent Police Complaints Commission is looking into any telephone police may have had with the vehicle and its occupants before the collision.