All you have to do is monitor the network traffic and then scan any AWS subdomains/IPs that pop up.
[edit] this makes me think… it’s not really possible for a secure connection from all of VW’s vehicles to an S3 bucket, is it? Anyone can pull the key from any of the millions of vehicles making the connection. Then they can dump whatever they want into the bucket.
Sure there is. Most people don’t have the hardware handy to do it, but at the end of the day it’s just a computer sending IPv4 traffic through an LTS cellular modem to an S3 bucket.
And if you know your car’s UDID you can probably look it up in said S3 bucket, since it was open to the public.