New management is probably reconciling inherited records. Property owners are required to maintain accurate information on existing tenants for legal reasons. The social security, driver's license, and vehicle registration are standard rental application information. The social security is for background check. The driver's license is to confirm identity. The vehicle registration is for parking conditions. (Street parking can sometimes be at issue in association with residency and parking violations, towing, etc.) In addition, not providing the information will only confirm that undocumented tenants are residing in the rental.
What reasons do you have for not providing the information (since management already has it, anyway)?