Cal. Veh. Code § 6301
When the secured party, his or her successor, or his or her assignee, has deposited, either physically or by electronic transmission pursuant to Section 1801.1, with the department a properly endorsed certificate of ownership showing the secured party as legal owner or an application in usual form for an original registration, together with an application for registration of the secured party as legal owner, the deposit constitutes perfection of the security interest and the rights of all persons in the vehicle shall be subject to the provisions of the Uniform Commercial Code, but the vehicle subject to the security interest shall be subject to a lien for services and materials as provided in Chapter 6.5 (commencing with Section 3068) of Title 14 of Part 4 of Division 3 of the Civil Code.
Ca. Veh. Code § 6301