The victim was hospitalized with life-threatening injuries after being struck near the intersection of 5th and Fairview streets at about 8:19 a.m. The driver fled from the scene.
Police believe the car that struck the teen is a black BMW 3-series, 2001-2006, equipped with an M-series sports package.
Anyone with further information or who may have witnessed the collision was urged to contact Investigator Bao at (714) 245-8214 or Orange County Crime Stoppers at (855) TIP-OCCS.
City News Service contributed to this report.