California Code, Vehicle Code - VEH § 17158

No person riding in or occupying a vehicle owned by him and driven by another person with his permission has any right of action for civil damages against the driver of the vehicle or against any other person legally liable for the conduct of the driver on account of personal injury to or the death of the owner during the ride, unless the plaintiff in any such action establishes that the injury or death proximately resulted from the intoxication or willful misconduct of the driver.