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Software update bricks some Jeep 4xe hybrids over the weekend
(arstechnica.com)
This is a most excellent place for technology news and articles.
https://www.reddit.com/r/Jeep/comments/194cbbj/turn_offdisconnect_remote_access_to_my_2021_gcth/
Now, it's possible that during maintenance, the process might involve uploading or downloading data to/from the manufacturer. That's hard to avoid.