California Code, Penal Code - PEN § 465

(a) A person who forcibly enters a vehicle, as defined in Section 670 of the Vehicle Code, with the intent to commit a theft or any felony therein is guilty of unlawful entry of a vehicle.

(b) Unlawful entry of a vehicle is punishable by imprisonment in a county jail for a period not to exceed one year or imprisonment pursuant to subdivision (h) of Section 1170.

(c) As used in this section, forcible entry of a vehicle means the entry of a vehicle accomplished through any of the following means: the use of a tool or device that manipulates the locking mechanism, including, without limitation, a slim jim or other lockout tool, a shaved key, jiggler key, or lock pick, or an electronic device such as a signal extender, or force that damages the exterior of the vehicle, including, but not limited to, breaking a window, cutting a convertible top, punching a lock, or prying open a door.

(d) A person may not be convicted both pursuant to this section and pursuant to Section 459.