The presumptions created by Section 803 of the Family Code as to the acquisition of property by a married woman by an instrument in writing shall not apply in an action based on Section 17150 with respect to the acquisition of a motor vehicle by a married woman and her husband.
Source:
Section 17150.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=VEH§ionNum=17150.5..