Last updated on November 15th, 2019 at 04:09 pm

Car Alarms have become a necessity to keep your car protected 24/7. Whether you have a nice stereo installed, leave expensive equipment or electronics in the car, or are flat our worried that your car might be at risk of being stolen – you need a comprehensive car alarm to both protect your vehicle (and what's inside), as well as keep you informed in a moment's notice if something does happening to your car.

Today's car alarms have come a long way since the early motion detection and door lock alarms. They have sensors placed all around the car to monitor several things. From a door opening or window breaking to paint damage and tire jacking, great alarm systems will alert you in real time with detailed messages and displays that will show you exactly what is happening to your car. The higher quality alarms will incorporate satellite features will not only protect your car from damage and theft (and notify you in real time what's happening), they will also enable smartphone applications to connect directly with your car and give you the option to start your car before you walk out in the cold/hot weather.

How We Tested

In order to find the ideal Car Alarm , we've combined many reviews across the industry with first-hand tests. There are multiple criteria that we take into consideration when rating and reviewing each car alarm, including:

  • Style (Looks, Design)
  • Display Type (LCD, Dotted, LCD Text, etc.)
  • Features (Range, Auxiliary Outputs, Trunk Release, 2-way Paging, etc)
  • Price
  • Quality (Materials used, manufacturer, etc)
  • Online Reviews (From multiple vendors such as Sonic Electronix, Crutchfield, Amazon and more)

The result from our combination of sources and testing is a list of the top rated and reviewed Car Alarm Units. And in addition to our compilation of products, CarAudioNow also provides multiple comparisons of prices from vendors to try to get you the best price for all of your products. But in the end, the best car alarm is one that meets your specific needs and is compatible with your car.

CarAudioNow is a professional review site that combines insights from our expert writers, tests and consumer feedback to generate comprehensive How-To and Buying Guides for automotive and boat/marine electronics and accessories. Once we assemble our lists using our set criteria, being part of the Amazon Services LLC Associates program (and other affiliate programs) allows us to provide our audience with quality content via affiliate links in the “Price Comparison” section with no additional cost to you. Clicking on one of our “Buy” links allows us to earn small fees to keep us growing and also to continue to bring you new content so we appreciate it when you use them. Check out our Affiliate Disclosure for more info.

Best Car Alarm List

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 2 Way LCD Remote
  • Keyless Entry
  • Dedicated Trunk Release
  • 3,000ft Range

Latest Prices

Buy on Ebay.com $138.04
Buy on Amazon $189.99
Last Amazon price update was: December 5, 2019 11:11 am

Compustar CS6900-AS Quick Review

In addition to alarm, remote start and keyless entry functions, this all-in-one kit has a couple of tricks up its sleeve. Should the alarm be set off the transmitter sends a signal to the LCD remote to let you know. Likewise, if the shock sensor is activated, the system sends an alert to the remote. That way, should someone or something have hit your car while it was parked outside your house or apartment you have a chance to respond before the culprit disappears.

The kit comes with two remotes, one of which has a small LCD display screen. There's also a CM600 control module and a 105dB siren. Both remotes include trunk release although the second lacks any 2-way capabilities. Range is up to 3,000′. The system is suitable for diesel engines but not manual transmission vehicles.

Pros: alarm notification feature
Cons: needs a key bypass

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 2 Way Rechargeable Remote
  • Dedicated Trunk Release
  • 3,000ft Range

Latest Prices

Buy on Ebay.com $133.99
Buy on Amazon
Last Amazon price update was: December 5, 2019 11:11 am

Chrimestopper SP-502 Quick Review

If you're looking for a kit that includes everything needed for a complete security, keyless entry and remote start system, the SP-502 could be a very good choice. It comes with two remotes, one of which has 2-way functionality, and works on just about any vehicle, manual or automation, gasoline, diesel or hybrid.
The alarm system includes a shock sensor and 120 db siren that should be loud enough to deter any would-be thieves. There's also a starter kill that ensures your vehicle is fully immobilized.

The master remote, which as a range of 3,000′, displays confirmation of actions commanded on an LCD screen. As a bonus, it's rechargeable so you needn't worry about replacing batteries. The companion remote has a range of 2,000′ and lacks the 2-way function. Note though that this system has multi-vehicle capability, meaning the same remote can be used on a second car or truck equipped with the Crimestopper SP-502.

Other useful features are:

  • Trunk release on the remote
  • Data ports for interfacing with other devices
  • Parking lights output (so you can spot your car in a dark parking lot.)
  • Code hopping receiver (prevents anyone from “hacking” into your system.)
  • Programmable for both tach and tachless as well as hybrid tachless connections. (The source of the engine start confirmation.)
  • Incorporates a turbo timer that lets the vehicle run for a short period so the turbo can cool after you reach your destination.

Pros: Works on any type of vehicle.
Cons: Some reports that installation is difficult for the novice.

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 2 Way Paging
  • Dedicated Trunk Release
  • Smartphone Smart Start Feature

Latest Prices

Buy on Ebay.com $219.99
Buy on Amazon
Last Amazon price update was: December 5, 2019 9:12 am

Viper VSS5000 Quick Review

Viper’s VSS5X10 has the latest and greatest in smartphone technology. It's a combination car alarm and starter. It uses the latest technology and software to incorporate all of the features and sensors of your alarm into an easily used application on your smartphone. It comes with shock sensors for improved sensitivity to shock or movement, truck release, keyless entry, remote start and more! All from the user friendly application on your smartphone. And since it is satellite enabled, you can be anywhere within the U.S. and lock, unlock or start your car, as well as get alarm notifications.

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 2 Way Paging
  • Dedicated Trunk Release
  • Smartphone Smart Start Feature

Python PS5000 Quick Review

The Python PS5000 is Python’s smartphone enabled car alarm and remote start system that has all of the best features from their car alarms combined with their remote start to give you a powerful system that isn’t bound by distance – use your smartphone to connect to your vehicle anywhere in the U.S. The package comes with dual shock sensors, keyless entry remotes, alarm speaker, remote start and truck release. And with a price tag in the mid-high $200s, it won’t break the bank either.

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 2 Way Paging
  • Dedicated Trunk Release
  • Dual Shock Zone Sensor
  • LCD Remote

Latest Prices

Buy on Ebay.com $79.91
Buy on Amazon $98.43
Last Amazon price update was: December 5, 2019 11:11 am

Avital 5303L Quick Review

The 5305L Car Alarm and Remote Start System is Avital’s flagship system. Cram packed with everything you need to secure your car, communicate with it remotely and even start it from almost a quarter mile away. It comes with features like keyless entry, remote start, dedicated trunk release and dual zone shock sensors – all monitored on a state-of-the-art LCD remote. Priced in the low $100s, the Avital 5305L is a great deal if you don’t mind without a smartphone app and unlimited range, but you can add the Python DSM200 to enable smartphone compatibility if you’d like to spend the additional money.

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 1 Way Paging
  • Dedicated Trunk Release
  • Dual Shock Zone Sensor
  • 1,000 ft Range

Latest Prices

Buy on Amazon $135.00
Buy on Ebay.com $135.00
Last Amazon price update was: December 4, 2019 11:11 pm

Compustar CS700-AS Quick Review

With the CS700-AS you get a lot for not much money, but of course there are some limitations. The kit provides remote start and keyless entry functions along with an alarm. Note though that the two remotes are both only 1-way units. However, with a range of just 1,000′ you probably won't be too far away when using it.
The alarm does include a shock sensor. This sounds the alarm if the vehicle gets hit.

Along with the remotes, in the box you'll find a CM600 control module, 105dB siren, a wireless transmitter and wiring. In other words, all you need. The system is suitable for diesel engines but not manual transmission vehicles.

Pros: Good value
Cons: Remotes are 1-way only. Limited remote range.

Key Features

  • Vehicle Security Car Alarm With Remote Start
  • 2 Way Paging
  • Dedicated Trunk Release
  • Dual Shock Zone Sensor
  • LCD Rechargeable Remote With 1 Mile Range
  • Smart Start Compatible

Latest Prices

Buy on Ebay.com $349.99
Buy on Amazon $399.95
Last Amazon price update was: December 5, 2019 10:12 am

Viper 5906V Quick Review

The Viper 5906V is complete. Every feature that you’d like in a car alarm is included in this package: Remote Start, Rechargeable Remote, Color LCD Remote, Keyless Entry, Dual Zone Sensor, Dedicated Truck Release, 2 Way Paging and Smartphone Compatibility – the 5906V has it ALL. And with a one mile range, you can rest assured that if something happens to your parked car, you’ll know about it no matter how far you parked. Only pitfall to this system is it’s price, right around $300, but if you’re willing to fork out the cash, it’s one of the best.

Installing a Car Alarm System

Once you choose a car alarm system that fits your needs, you'll need to install it or have it installed by a professional. Take a look through our Guide to Installing a Car Alarm System to get an idea of the effort and skills it takes to install one, and whether or not you'd prefer to have a professional to install it for you.

What to Look For In A Car Alarm System

Car theft is one of the most common types of crime today. Whether it’s an iPod, cash, or the whole car – most people have had their cars broken into or know someone who has. It’s a terrible feeling to walk out to your car to find that your car has been broken into or stolen, especially when most peoples’ cars are a valued possession and a necessity for every day life. A car alarm could be the difference between a break in and a walk by. They are incredibly effective at deterring auto theft and break ins.

When you’re looking for the best car alarm for your vehicle, there are various features and systems to compare. Even though it’ll help to have any car alarm, knowing the difference between them and choosing the one that best fits your needs will maximize its effectiveness and keep your car secure at all times.

Common Terms & Features

There are many different types of car alarms, some with more standard features than the other. Knowing what type of feature is what will help you make an informed decision.

Keyless Entry – Keyless entry systems allow you to unlock your car doors by pushing a button on a remote. The remote connects with the alarm system to unlock/lock the car’s doors without the use of a key.

Remote Start – Remote start is a feature that enables you to start your car’s engine without actually being inside the car. You can use a remote or other device (depending on the unit) to remotely start your vehicle from hundreds of yards away.

Trunk Release – Trunk release is a form of keyless entry that is specific to remotely opening the trunk of your car. It enables you to open the trunk without unlocking the door from a remote. Sometimes you may want to just open up the trunk without necessarily opening up all of the doors, trunk release allows this.

Car Location – Car location is a form of panic button that gives you the ability to track down your car when you may not know exactly where it is. For example, you go to a concert, or a baseball game and don’t remember the exact row you parked in. The car location feature will turn the alarm noisemaker on so that you can follow the sound to find your car.

Two-Way Pager– Two-way pager alarms are those that not only send information from your remote to your car (like unlocking the door), they also receive information from your car. These types of alarms allow you to see in real time when an attempt to break in is happening, and alarm you from your remote when it happens. Some two-way pagers can work up to a mile away, giving you the confidence that your car is safe no matter where you might be.

Alarm Noisemaker – The alarm’s noisemaker is the most basic feature on a car alarm. It’s what makes noise when your car is being broken into in order to discourage the thief and draw attention to the car. Basically a loud speaker, the noisemaker is measured in decibels and the higher the decibels, the louder the sound.

Immobilizer – An immobilizer is a device that allows a vehicle from being started unless you have a key/remote that matches to the device. The key typically has a chip installed that communicates with the immobilizer in order to allow the car to start. This prevents thieves from being able start your car, even if they break into it.

Automatic Window Roll-Up – Automatic window rollup is a feature that will roll up the windows of the car after you have turned it off. Even though most of the time, you might be conscientious of your windows when you leave your car, the automatic window roll-up will automatically roll them up in the case that you forget.

Compatibility

Most of the aftermarket car alarms are compatible with any car, as long as it has a 12-volt system. However, there are some car alarms that don’t work with specific vehicles and it’s always best to check the alarm manufacturer’s website to check for compatibility.