Last updated on May 18th, 2019 at 10:39 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.

Here is a list of 2019's top rated and reviewed car alarms to help you choose the best products for your car. Click an alarm to go to the full review, or just scroll down to view all of the reviews:

Our RankCar AlarmRemote StartPaging TypeSmartphone AppPrice
1Compustar CS6900-ASYes2-WayNo$$
2Crimestopper SP-502Yes2-WayNo$$
3Viper VSS5000Yes2-WayYes$$$
4Python PS5000Yes2-WayYes$$
5Avital 5303LYes2-WayNo$$
6Compustar CS700-ASYes1-WayNo$
7Viper 5906VYes2-WayNo$$$

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 experts, 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. This allows us to earn small fees to keep us growing and also to continue to bring you new and exclusive content. Check out our Affiliate Disclosure for more info.
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Best Car Alarm List

Quick Stats

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

Price Comparison

Buy on | $138.05
Buy on Amazon | $149.95
Last Amazon price update was: October 15, 2019 5:12 pm

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

Quick Stats

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

Price Comparison

Buy on Amazon | $105.00
Buy on | $129.99
Last Amazon price update was: October 15, 2019 5:12 pm

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.

Quick Stats

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

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.

Quick Stats

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

Price Comparison

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.

Quick Stats

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

Price Comparison

Buy on Amazon | $95.00
Buy on | $119.91
Last Amazon price update was: October 15, 2019 4:11 pm

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.

Quick Stats

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

Price Comparison

Buy on Amazon | $89.95
Buy on | $135.00
Last Amazon price update was: October 15, 2019 6:13 am

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.

Quick Stats

  • 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

Price Comparison

Buy on | $349.99
Buy on Amazon | $399.95
Last Amazon price update was: October 15, 2019 3:14 pm

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.

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.


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.

Installing a Car Alarm System

You're invested in your car and you don't want anyone messing with it, or worse, taking it. That means it's time to fit an alarm. Maybe it didn't come with one from the factory, or perhaps you're looking to upgrade. Many modern systems include a very useful cell phone app. You could go to an installer and pay an arm and a leg, or you could do it yourself.

Car alarms are surprisingly easy to fit. In most cases the hardest part of the project is reaching the wiring harnesses beneath the steering column. That means sliding the seat all the way back, opening the door wide and twisting yourself into position! But so long as you're pretty flexible there's no good reason for not doing this job yourself.

Here we'll explain how to install a car alarm. Some alarms come with a remote starter. Alternatively, you may want to fit a separate starter kit. As the two projects are very similar, we'll cover how to install a remote car starter at the same time. The sections we'll go through are:

  • Whats in the box
  • Tools, materials and information
  • The mounting process

What's In the Box

The parts that come with an alarm depend on its specification. At a minimum you'll have:

  • Instructions for mounting
  • Control box
  • Siren
  • Starter kill relay
  • LED indicator
  • Shock sensor
  • Wiring harnesses
  • Keyring remotes etc.

Some of these might be combined into a single unit. The siren might be built into the shock sensor. You might also add other components. For example, an ultrasonic or RF proximity sensor will protect a convertible left with the top down.

Tools, materials and information

The single most useful thing to have is a wiring diagram for your vehicle. These are usually found in workshop manuals. This will tell you what color wires you're looking for and where they are. In addition, you will need:

  • Multimeter with test probes. This lets you see when a wire has power. A wire probe or test light will do the job too.
  • Screwdrivers
  • Pick tools
  • Electric drill
  • Wire strippers
  • Pliers
  • A strong light (a headlight device might be useful.)
  • Electrical tape
  • Cable ties

Depending on how you like to join wires, you may also use:

  • T-taps
  • Soldering iron
  • Heat shrink sleeving

Soldering is the best method because the last thing you want is a bad join. That will probably leave you unable to start your vehicle. However, T-taps can work if fitted with care.

The Alarm Mounting Process

This splits into seven steps:

  1. Overview of the process
  2. Siren mounting
  3. Control box mounting
  4. Door and hood switch connections
  5. Other components
  6. Remote start
  7. Test

1. Overview of the Process

Depending on how your alarm is designed you'll be mounting two or three main pieces. These are the siren, the controller and possibly a shock sensor. The siren goes under the hood with a wire fed through the firewall to the control box. The shock sensor needs mounting to a rigid surface. Under the kick panel, (the panel in front of the door,) is a good place. There may also be an LED to show when the alarm is armed.

The control box mounts close to the ignition wiring harness. That's best reached under the steering column. The controller goes here because you'll be connecting to three wires in the harness. These are: a 12V constant (always on,) the Ignition wire and the starter wire. The Ignition wire is live when the engine is running but the starter connection only comes on when you're cranking the engine. In addition, you'll need to provide a good ground.

Most alarms connect to the hood and trunk opening sensors. Consider adding these if your vehicle doesn't have them.

The steps for fitting a remote start are very similar to those for an alarm.

As with any electrical project on your vehicle, disconnect the battery before starting work. This prevents any short circuits.

2. Siren Mounting

Find a solid mounting location under the hood. (The firewall is a good place.) Orient the siren so it points down to prevent water getting in. Drill mounting holes and fit the siren, then thread the wires through the firewall into the cabin. If the alarm instructions suggest a ground under the hood, make this happen.

3. Control Box Mounting

This usually goes under the steering column, near the fusebox and ignition wiring harness. If your alarm has a separate ignition kill relay mount this in the same place.

Remove the plastic trim panels, and also any metal brackets that may be in the way. (Check there are no airbags down here. They need careful handling!)

Join the wiring harness supplied with the alarm to the controller. Also connect the siren.

Now you need to decide which of the ignition harness wires to connect to. Even if you have a manual telling you what colors they are, check this with your multimeter. (You will need to reconnect the battery first!)

If making soldered joins, strip each wire and solder it to the appropriate wire from the alarm controller. (They'll be identified in the instructions.) Alternatively, make good connections with the T-taps. Cover these with electrical tape. Ensure any ground wire in the alarm harness is connected to the vehicle body.

Install the ignition kill relay, making the appropriate electrical connections.

Mount the control box and relay securely. These are usually small so can be cable-tied to the wiring harness.

4. Door and Hood Switch Connections

You'll want the alarm to sound if the doors are opened. You do that by tapping in to the wires from the door switches. These are usually found behind the kick panels. The manual will indicate the wire color. Again, confirm you have the right wires with your meter.

Follow the instructions to join the alarm controller wires.

If you are linking to the hood and trunk switches, make those connections at the same time.

5. Other Components

If your alarm system has a proximity sensor, LED indicator or other components, fit them now. Follow the instructions in the box. It's a good idea to hook in your lights to the alarm as flashing lights make it obvious which car is being broken in to. To do this, connect those wires to the controller as explained in the instructions supplied.

6. Remote Start

The process for fitting a separate remote starter is similar to that for the alarm controller. It goes under the steering column and connects into the ignition harness. Use your multimeter to find the wires you need. These are the constant 12V, the cranking circuit, the running circuit, (sometimes termed “Ignition 1” and “Ignition 2”,) and the Accessories. As with the alarm controller, connect to these wires following the instructions supplied with the remote start kit.

7. Test

Before refitting the various trim pieces it's a good idea to test that the system works correctly. Reconnect the battery if necessary, then go through setting and activating the alarm. If you installed a remote start, check that operates as expected.

If you find any problems check that wires are all connected as shown in the instructions. Then make sure each connection is good. (Your multimeter will help.) Also check that you have a good ground. If the alarm still isn't working after doing this contact the manufacturer for support.

Go Steady, Don't Rush

The thought of fitting an alarm system or a remote start can be pretty daunting but it shouldn't. It's a job someone with just a little experience of vehicle electrical systems can undertake. Start by reading the instructions thoroughly. Then get familiar with the system components and go slowly. In a couple of hours you'll be enjoying greater security and convenience.

Here's a great video for those who are looking into installing a remote car starter in their own vehicle: