The woman, 36-year-old Shantel Hamilton of Merced, later died in the hospital, police say.
Hamilton was riding her scooter near the intersection of 26th and G streets around 9 pm Monday.
That's when someone driving a 2011 to 2014 Grey BMW 5 Series car hit her and drove away.
When first responders arrived, they performed CPR and rushed her to the hospital with major injuries.
She died later in the hospital.
Police are looking for the suspect car and say it has front-end damage.
If you have any information about this incident, please contact Officer McKeeman at (209) 388-7752 or by email at firstname.lastname@example.org