[bri3d]

There is an extremely limited amount of diagnostic data recorded by most cars (Tesla aside) - absolute limits, performance counters, and freeze-frame diagnostic data. There simply isn't much storage, and again, Tesla aside, most manufacturers don't want to have to buy high-write capable flash of the sort that could cope with constant logging.

The most invasive is probably airbag blackbox data, which is stored upon deployment and not routinely uploaded besides as part of an investigation.

As far as I know based on extensive reverse engineering of many modern European vehicles, no location data is routinely stored or uploaded to a dealership tool by any of them.

[mixmastamyk]

Nice, thanks. Maybe I'll look into a newer car then, was holding off because of this.