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Have you ever wondered how some cars can be unlocked and started without using a physical key? This is the magic of keyless entry and keyless start, two features that are becoming more common and popular in modern vehicles. Keyless entry is a system that allows you to lock and unlock your car doors without inserting a key in the lock. In addition to core security features, some systems offer convenient extras like hands-free trunk opening by waving your foot under the bumper, or automatic car locking when you walk away. Instead, you use a small device called a fob or a keychain that communicates with the car through radio waves. But what is keyless entry and how does it work? And what are the benefits and drawbacks of this technology? In this article, we will reply to these queries and other.

What is Keyless Entry and How Does It Work

However, keyless entry and keyless start also have some potential disadvantages and risks Therefore, if you have a car with keyless entry and keyless start, or you are planning to buy one, you should be aware of how these systems work and how to use them safely and responsibly. In the following article, we will explain in more detail what is keyless entry how it works and features of these systems, and what are the best practices and tips to protect your car from theft or misuse.

How Keyless Entry Works

Keyless entry works by using radio frequency identification (RFID) technology. This involves sending and receiving radio signals between the car and the keychain. The keychain has a unique code that identifies it as the authorized device to access the car. The car has a receiver that scans for the keychain’s signal within a certain range. When the car detects the keychain’s signal, it verifies the code and unlocks the doors.

Advantages of Two-way System:

There are two main approaches to keyless entry: manual activation with a fob or remote, and hands-free with automatic unlocking. One-way systems only send signals from the keychain to the car, while two-way systems also send signals from the car to the keychain. Two-way systems have some advantages over one-way systems, such as:


Two-way systems have a longer range because the car can boost the signal of the keychain. This means you can unlock your car from a farther distance, or even from inside a building.


Two-way systems provide feedback to the keychain, such as a beep, a light, or a vibration. This lets you know if your car has received the signal and performed the action. This can be useful if you are not sure if you locked your car or not.

Technologies used in Keyless Entry System:

Keyless entry systems use different technologies to encrypt and transmit the radio signals, such as:

Rolling codes:

These are codes that change every time the keychain is used. This prevents thieves from copying or replaying the signal and accessing the car.


These are codes that are generated by a mathematical algorithm based on a random challenge from the car and a secret key from the keychain. This ensures that only the correct keychain can unlock the car.


This is a wireless technology that allows devices to communicate over short distances. Some keyless entry systems use Bluetooth to pair the car and the keychain, which creates a secure connection.

Read more about the topic: Process of Laser Cut Keys: Everything You Need to Know!

How Keyless Start Works

Keyless start is similar to keyless entry, but it requires the keychain to be inside the car. This is to prevent the car from being started by someone outside the car, or by someone who has stolen the keychain. Keyless start works by detecting the keychain’s signal within the car’s interior and allowing the driver to start the engine by pressing a button on the dashboard. Keyless entry and keyless start are designed to make your driving experience more convenient and comfortable. You don’t have to worry about losing your keys, fumbling with them in the dark, or scratching your car door.

How Keyless Start Works

Pros of Keyless Start:

This saves time because you don’t have to insert and turn the key to start the car. A single click starts the process.

Wear and tear:

Keyless start reduces wear and tear on the key and the ignition switch, which can extend their lifespan and prevent malfunctions.

Fuel efficiency:

The system of keyless start improves fuel efficiency because it allows the car to automatically stop and start the engine when the car is idle, such as at a traffic light or a stop sign. This reduces fuel consumption and emissions.

Cons of Keyless Start:
Battery life:

Keyless Start relies on the battery of the keychain and the car. If the battery of the keychain dies, you may not be able to start the car. If the battery of the car dies, you may not be able to unlock the car. Therefore, it is important to check and replace the batteries regularly or have a backup plan in case of emergency.


This can increase the risk of theft because thieves can use devices to amplify or intercept the signal of the keychain and start the car. Therefore, it is important to keep the keychain away from windows and doors and to use anti-theft devices such as steering wheel locks or alarms.


A keyless start can make you forget the keychain inside the car because you don’t need to take it out to start or stop the car. This can lead to locking yourself out of the car or leaving the car vulnerable to theft. Therefore, it is important to always remember to take the keychain with you when you exit the car, or to use a reminder system such as a sound or a light.

If there is a front door in your house, then you must know how you can replace deadbolt of the door. Click here to read out this article: Single vs Double Cylinder Deadbolt In-depth Analysis

How to Install Keyless Entry and Keyless Start

If you want to enjoy the benefits of keyless entry and keyless start, you need to install a system on your car. After having enough knowledge about the keyless entry and how does it work, the next step is to implement it. There are many options available on the market, with different features and prices. Here are some tips on how to choose and install the best system for your car:

How to Install Keyless Entry and Keyless Start


Before you buy a system, you need to check if it is compatible with your car’s make, model, and year. Some systems may require additional wiring or modifications to your car, which can affect the warranty or the performance of your car. You can consult your car’s manual, the system’s manufacturer, or a professional locksmith to find out if a system is compatible with your car.


You need to decide what features you want from your system, such as one-way or two-way communication, rolling codes or challenge-response encryption, Bluetooth or RFID technology, fobs or smartphones, sensors or buttons, and so on. One may also need to consider the range, the feedback, the battery life, and the security of your system. You can compare different systems online or visit a local store to see and test them in person.


You need to set a budget for your system and look for the best value for your money. The price of a system can varies depending on the brand, the quality, the features, and the installation. You can shop around for the best deals or look for discounts or coupons. You can also save money by installing the system yourself if you have the skills and the tools.

Important Steps to Follow:

Installing a keyless entry and keyless start system can be easy or difficult, depending on the system and your car. You can follow these general steps to install a system:

Read the instructions:

Read the instructions carefully and make sure you understand them. You also need to gather all the tools and materials you need, such as a screwdriver, a wire stripper, a soldering iron, a multimeter, and so on.

Disconnect the battery:

Disconnect the battery of your car, to prevent any electrical shocks or damages. You also need to make sure you have the code to reset your radio, if your car has one.

Remove the panels:

Remove the panels of your car’s dashboard, door, or trunk, to access the wires and the components of your car. You need to be careful not to damage or lose any parts, and to label or mark the wires and the connectors.

Connect the wires:

Connect the wires of your system to the wires of your car, according to the instructions. You need to make sure the connections are secure and correct and use the appropriate tools and methods, such as soldering, crimping, or taping.

Test the system:

Test the system before you reassemble the panels, to make sure it works properly. You need to check if the keychain and the car can communicate if the doors and the trunk can lock and unlock, if the engine can start and stop, and so on. One may need to troubleshoot any problems and adjust the settings if needed.

Reassemble the panels:

You need to reassemble the panels of your car and reconnect the battery. You need to make sure everything is in place and working and reset your radio if needed.

If you are not confident or comfortable with installing the system yourself, you can hire a professional locksmith to do it for you. A professional locksmith can provide you with expert advice, quality service, and a warranty. Because their team of professionals is familiar with the keyless entry and how does it work. One of the best locksmiths in your area is Patriot Locksmith, a company that specializes in keyless entry and keyless start systems. 

Read more: How to save money on key fob replacement and programming?

Video Guidance:

Here is a video guidance for you to understand what keyless entry is and how does it work:


In this article, we have learned what keyless entry and keyless start are, how they work, and how to install them on your car. Keyless entry and keyless start are systems that allow you to access and operate your car without a physical key, using radio signals and a keychain device. They offer many benefits, such as convenience, security, comfort, time, wear and tear, and fuel efficiency. However, they also have some challenges, such as battery life, theft, and forgetting. Therefore, you need to choose and install the best system for your car and maintain and troubleshoot it regularly.

One of the best resources we recommend is Patriot Locksmith, a company that specializes in keyless entry and keyless start systems. Patriot Locksmith is fully licensed, bonded, and insured, and has over 20 years of experience in the locksmith industry. They offer high-quality products and services, such as installation, repair, replacement, programming, and emergency assistance. They also offer free estimates, competitive prices, and a customer satisfaction guarantee.

If you are willing to hire a locksmith to fulfill your locksmithing needs, then you must read this article. Click here to continue reading: 5 Essential Services to Expect from a Reliable Auto Locksmith

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