Vehicle Code section 10753

(a)

Any person who removes, alters, or obfuscates any vehicle identification number or other unique marking that has been added to a catalytic converter is guilty of a misdemeanor.

(b)

Any person who knowingly possesses three or more catalytic converters that have the vehicle identification number or other unique marking removed, altered, or obfuscated is guilty of a misdemeanor.

(c)

This subdivision does not apply to either of the following:

(1)

Any person who is removing, altering, or obfuscating a vehicle identification number or other unique marking in order to apply a new vehicle identification number or unique marking because the catalytic converter is being lawfully installed on a different vehicle.

(2)

Any person that is disassembling, smelting, or otherwise permanently destroying a catalytic converter lawfully in their possession.

Source: Section 10753, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=VEH§ionNum=10753.­ (updated Jan. 1, 2024; accessed Jul. 21, 2025).

Green check means up to date. Up to date

Verified:
Jul. 21, 2025

§ 10753's source at ca​.gov