How Long Does It Take For A Car Alarm To Stop?

Imagine you sleeping at night but your neighbor’s car alarm won’t stop. For sure you will be very angry but the car alarm will stop after a short time. So how long do car alarms go off and what you should do when the neighbor’s car alarm keeps going off? We are here to tell you!

How Car Alarms Work?

To know how long do car alarms last, first of all you need to know how it works. Car alarms are made up of several different parts. The modern car alarm is made up of a computer, a receiver that responds to your key code, a loudspeaker and several different sensors. 

The car alarm working principle is also simple. When the alarm is switched on and a sensor receives a response, the alarm sounds. When the sensors don’t record any unusual activity, the car alarm remains active but silent and unnoticeable.

In general, under the usual circumstances, a car alarm would go off if it senses an intrusion above its normal threshold. Because of the shock sensors that are featured in most modern vehicles so it is possible. If there are any attempts to break into the vehicle, the car alarm will go off and it alerts the car owner of the felony that’s going on. It also helps to detect the potential thief from their bad purpose. 

Usually, voltage sensors are used in basic car alarms. These sensors are triggered when the voltage in the car drops suddenly. The voltage drops in when the lights are turned on or the doors are opened. You can also press a button and turn a car’s alarm manually. This feature is really helpful when you are looking for a car in a huge parking lot.

Check it out how the car alarm work on this video below!

How Long Do Car Alarms Go Off

As you wonder how long do car alarms go off, the answer is depending on your palace where you live, the time may be different. Most cities now have ordinances that require both car and home alarms to automatically shut off after a specified period of time, such as five or 10 minutes after they first begin sounding. If the alarm doesn’t shut off, the homeowner can be cited or fined.

how long do car alarms last
The answer is depending on your palace where you live, the time may be different. (Source: stokesentinel)

But how long do car alarms go off by itself? Car alarms have changed from years ago. They seem to be smarter now about shutting off quickly. But in the past, the car alarm could keep going off for a day or even until the owner shuts it off. All of these potential situations can happen. Usually, the car alarm keeps going off for 20 minutes. But if your car alarm keeps going off, or will not switch off automatically after 20 minutes, it can cause a noise nuisance to your neighbors. To avoid this you should: have the alarm system serviced and repaired by a competent alarm engineer.


What To Do If Your Neighbor’s Car Alarm Keeps Going Off After 10 Minutes?

You already know how long do car alarms go off. So if you are facing a neighbor’s car that alarm keeps going off even after 10, 20 or 30 minutes. There are few things you can do to stop it.

First of all, you can call the police. The police have a non emergency dispatcher, so you don’t have to call 911. Easiest way is to just use Google Maps to find a local police department and call that number. They will take your address and phone number and the license plate of the car. They may send someone out too. When the police car gets there, they can run the plates and call the person.

neighbor's car alarm keeps going off
The police have a non emergency dispatcher, so you don’t have to call 911. (Source: lahidtatraining)

You also can leave a note to the neighbor. A faulty car alarm can be caused by a bad remote, by a bad ground connection, a lot of different things. But the neighbor might not even know they have a problem. Leave a nice note explaining what happened at what time.

The last thing you can do is checking your city ordinances. Some cities have laws related to how often and loud alarms are. Check your local ordinances. Your neighborhood also might have ordinances, so check with your HOA as well.

Why Does The Car Alarm Not Stop?

As we mentioned above in the answer for the question, how long do car alarms go off. If after 20 minutes, the alarm does not stop, the car alarm system may have a big problem. There are some potential problems that may affect the car alarm.

1. A Malfunctioning Key Fob

A malfunctioning key fob is a common reason for an inappropriate triggering of a car alarm. A key fob is a device which is used to lock or unlock the door of a car. Using this device is very easy: you just have to push a button. In modern cars, the key fob is installed on the inside, and it helps jump start the ignition.

neighbor's car alarm won't stop
A malfunctioning key fob is a common reason for an inappropriate triggering of a car alarm. (source: aripaev)

When a key fob is malfunctioning, the wrong signal is sent to the car centre even if you do not press the button. Since it comes when it is not expected, the car alarm will start. You can fix the problem just by changing the batteries of the key fob. Resetting the device is also a way to fix the issue.

2. The Dead Battery

If the battery has no charge in it, the car alarm can go off without reasons. Many vehicle owners do not know that can alarms have other purposes than alerting them of a robbery or a crash. This feature is also used to alert car owners of other problems. 

 The car battery has no power, the alarm goes off. The car battery is dying, the alarm goes off. Using a voltmeter to check whether your car has a bad battery or not. You will detect the reason why the car alarm goes off. If the level of charge does not go above 12.6 volts, you need to get a new battery.

how long do car alarms go off
The car battery has no power, the alarm goes off. (Source: liveabout)

The dying battery is also a reason why the car alarm keeps going off. Replacing a battery is pretty easy. If you do not take this issue seriously, your car may stop when you need to go somewhere. If you buy a fresh battery, some stores may offer delivery services. In an emergency situation, this service is very helpful.

You can take your car to a service centre where the specialist can help to tell you how to replace the dead battery. 

Wrap Up

In the modern car, the alarm may go off for 5-20 minutes and it depends on the rule of the place where you live. If you live next to a neighbor who has a car with an alarm kept going off at night, you can try our several methods above to stop it. If you cannot call the neighbor, call the police since it is the safe choice to help you stop it immediately. Sometimes, the car alarm going off is not because of the thief. There is a potential problem that the car has a bad, rust or dead battery. 

Check more other maintenance tips to learn about your car performance and leave a comment below if you have any doubt.