How frequently do you propose? If it would change your 'anonymous' ID e.g. daily then all it has to do is look at the other data where cars seemingly move to and from the very same home address to the very same work address with a strange pause at work for ~8 hours and a strange pause between ~10 PM and ~7 AM due to sleep.
The device discussed in the article also knows our own SSID and surrounding SSIDs (supposedly it has WLAN to communicate) and can therefore also figure out where you live using e.g. Wigle [1].
A way to actually anonymise the data would be to use hashes and only use those instead.