5 Best Car Alarm & Anti-Theft Units - May 2026

BEST OF THE BEST

Avital

5305L Security System

Helpful Features

A feature-packed security and remote start system with easy-to-read LCD remotes.

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PROS

Includes a 2-way, 4-button LCD remote that is backlit.
Security features include dual-zone impact sensor, nuisance prevention, warn away, and revenger siren.

CONS

Some users had issues with customer service.

BEST BANG FOR THE BUCK

Crimestopper

SP-402 Car Alarm

Simple Yet Solid

Budget one-way system with programmable functions, including impact detection and chrome remotes.

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PROS

Comes with the standard fare of car alarm technology, such as remote start, keyless entry, and shock sensor for impacts.
The range is 2,300 feet.

CONS

Some dislike that features can't work simultaneously and can be a bit slow to activate.

Viper

350 Plus 3105V One-Way Car Alarm

Trusted Brand

Easy to program and install one-way system that can also hook up to car's lights.

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PROS

Features a kill-switch system in addition to impact and break-in detection.
Also has keyless entry.
Works within a range of approximately 1,300 feet.

CONS

Some users feel the alarm could be more sensitive to impact and touch.

latch.it

Keyless RV Door Lock

Durable and Rugged

This rugged remote locking and keyless entry system is best for larger vehicles such as RVs and campers for peace of mind in the great outdoors.

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PROS

Rated at IP67 for water and dust proofing, this model is perfect for vehicles that will be enduring the elements while parked.
Comes with mounting hardware and tools for installation.
Features a backlit keypad for nighttime entry.

CONS

Does not fit class A or class C RVs.

Compustar

CSX4900-S Two-Way Remote Start

Top of the Line

Long range, feature-packed two-way alarm system that can turn your smartphone into a backup remote.

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PROS

Slightly pricier than the competition, this system covers all the bases and even includes GPS tracking and multiperson access with the DroneMobile app.
Keyless entry and remote start have a 3,000-foot range when not using DroneMobile.

CONS

Installation requires a professional and can be pricey.

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How We Tested

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

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First Reviewed

August 13, 2021

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