Jameson Witty, 18, will spend half a year behind bars after he and his accomplice Anthony Edward Janow, 26, pleaded no contest to misdemeanour charges, reported TMZ online.
The youngsters were caught on camera pulling off parts of the Porsche Carrera GT on November 30 after the tow truck removing it from the devastating scene in Santa Clarita, California, stopped at traffic lights.
After witnessing the heartless crime, the tow truck driver reported it to Santa Clarita Valley Sheriff's Station.
It is believed Anthony will be given the same sentence when he appears in court in October.
Walker was tragically killed last year after the Porsche Carrera GT he was a passenger in crashed into a tree and burst into flames in Santa Clarita.
His longterm friend Roger Rodas was also killed in the fiery crash.