What Does a Car Alarm Look Like?

Written by

CarParts.com Research Team

Automotive and Tech Writers

Updated on May 27th, 2025

Reading Time: 2 minutes
Summary
  • A car alarm has different electronic components that are wired to the lights on the dashboard and windshield, as well as car horns.
  • There are four car alarm types: active car alarms, passive car alarms, two-way car alarms, and audible car alarms.
  • Car alarms alert drivers when people attempt to break into or damage the vehicle.

What Does A Car Alarm Look Like?

A: A car alarm has different electronic components that are wired to the lights on the dashboard and windshield, as well as car horns. The lights activate to indicate the alarm is armed. The horn attached to the alarm typically has a round metal plate called a diaphragm and an electromagnet.

Car Alarm Types

Car alarm are an excellent deterrent for would-be thieves and vandals, making them an integral part of any vehicle’s security system.

There are four alarm types to keep an eye out for: active car alarms, passive car alarms, two-way car alarms, and audible car alarms. While they all alert drivers when someone is breaking into their vehicle, they differ in how they’re set up.

Active Car Alarms

Active car alarms require the driver to press a button to lock the doors and activate the alarm system. This means drivers will need to manually the alarms to ensure that they work.

Passive Car Alarms

Unlike active car alarms, passive car alarms automatically lock the doors of the vehicle as soon as the driver turns off the ignition and closes the doors.

Two-Way Car Alarms

Two-way car alarms are an advanced type of alarm that transmits information from the car to a remote. This allows drivers to activate and deactivate the alarms as well as lock and unlock the doors from far away via key fobs.

These fobs typically come with LCD screens that alert drivers when someone is too close, trying to break in, or if the alarm has been triggered.

Audible Car Alarms

Another noteworthy alarm type is the audible car alarm, which is a basic alarm system installed in modern vehicles with keyless entry. These alarms emit loud sounds when the vehicle detects suspicious activity, such as people getting too close, attempting to break in, or attacking the vehicle.

What Makes Car Alarms Important?

Car alarms alert drivers when people attempt to break in or damage the vehicle. They’re an excellent deterrent for would-be thieves and vandals, making them an integral part of any vehicle’s security system.

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