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Car alarms are security systems designed to protect vehicles from theft and vandalism. They work by detecting unauthorized entry or movement of the vehicle and triggering an audible alarm to alert the owner and deter potential thieves. In the hierarchy of automotive systems, car alarms fall under the category of automotive alarms, which itself is a subcategory of automotive brake systems. This placement reflects the fact that car alarms are a type of safety feature for vehicles, alongside brake systems and other alarms. Car alarms can include various components such as sensors, sirens, and control modules. Sensors may be placed on doors, hoods, or trunks to detect unauthorized entry, while motion sensors can detect movement inside the vehicle. The siren produces the loud noise that alerts the owner and passersby of a potential threat. The control module is the brain of the system, coordinating the various components and activating the alarm when necessary. In summary, car alarms are security systems designed to protect vehicles from theft and vandalism. They fit into the hierarchy of automotive systems as a subcategory of automotive alarms, which falls under automotive brake systems. Car alarms can include sensors, sirens, and control modules that work together to detect unauthorized entry or movement and trigger an audible alarm.