It's not even just Nissan. It's any car manufacturer that records any type of data in cars that have microphones, cameras and GPS. Many companies don't keep privacy policies updated, if they even have one at all. The enforcement of privacy policies is lacklustre and researchers have found multiple instances where data collection and privacy policies don't match what companies actually do. Even big names like Apple and Google have been caught out doing this.

Unless the software is open source where everyone can check and see what it's doing, or at absolute minimum it's been audited by a 100% independent auditor, Do.Not.Trust.It.

Do not trust for profit companies with your data and privacy.