Cal. INS § 1877.5

No insurer, agent authorized by an insurer to act on its behalf, or licensed rating organization who furnishes information, written or oral, pursuant to this article, and no authorized governmental agency or its employees who (a) furnishes or receives information, written or oral, pursuant to this article, or (b) assists in any investigation of a suspected violation of Section 1871.1, 1871.4, 11760, or 11880, or of Section 549 of the Penal Code, or of Section 3215 or 3219 of the Labor Code conducted by an authorized governmental agency, shall be subject to any civil liability in a cause or action of any kind where the insurer, authorized agent, licensed rating organization, or authorized governmental agency acts in good faith, without malice, and reasonably believes that the action taken was warranted by the then known facts, obtained by reasonable efforts. Nothing in this chapter is intended to, nor does in any way or manner, abrogate or lessen the existing common law or statutory privileges and immunities of an insurer, agent authorized by that insurer to act on its behalf, licensed rating organization, or any authorized governmental agency or its employees.