The victim was killed on scene when he was hit shortly before 2 a.m. in the 7000 block of Alameda Street, according to Huntington Park Police Lt. Al Martinez. The victim's name was not released.
Police said the suspect initially left the scene but returned in an effort to retrieve his front bumper, which had his license plate.
The 30-year-old suspect was taken into custody on suspicion of felony hit-and-run, drunken driving and manslaughter charges.
City News Service contributed to this report.