20K accounts from Autotrader (autotrader.com) were exposed in this breach. Besides email addresses, it included phone numbers, physical addresses and vehicle details.
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Email addressesPhone numbersPhysical addressesVehicle detailsVehicle identification numbers (VINs)
In January 2023, 1.4M records from the Autotrader online vehicle marketplace appeared on a popular hacking forum. Autotrader stated that the "data in question relates to aged listing data that was generally publicly available on our site at the time and open to automated collection methods". The data contained 20k unique email addresses alongside physical addresses and phone numbers of dealers and vehicle details including VIN numbers.
Source: Have I Been Pwned (CC BY 4.0)