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The automotive domain has realized amazing advancements in communication, connectivity, and automation—and at a breakneck pace. Such advancements come with ample benefits, such as the reduction of traffic accidents and the refinement of transit efficiency. However, these new developments were not necessarily made with security in mind. Researchers have unearthed a number of security vulnerabilities in paradigms such as in-vehicle networks (IVNs), the Internet of Vehicles (IoV), and intelligent transportation systems (ITSs). As automotive technologies continue to evolve, it would be realistic to expect new vulnerabilities to arise—both vulnerabilities that are identified and vulnerabilities that are not. If—or more pragmatically, when—these vulnerabilities are exploited, intrusion detection will be paramount. Therefore, we find it prudent to review intrusion detection in the automotive domain. We explore a …