We researched and compared the top aftermarket keyless entry systems available on Amazon, evaluating manufacturer specifications, published industry standards, and aggregated owner feedback. Our goal was to identify systems that offer reliable performance, robust safety features, and straightforward installation. Whether you want to add remote locking to an older car or upgrade to a smart key system, this guide will help you choose the right one for your needs.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Viper 3105V 1-Way Remote Start and Keyless Entry System Best Overall 1-way remote start and keyless entry, 1-mile range, 2-button remote |
9.2 | 🛒 Check Price |
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Avital 4105L 1-Way Remote Start and Keyless Entry System Best Value 1-way keyless entry and remote start, 1-mile range, 2-button remote |
8.7 | 🛒 Check Price |
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Compustar CS7900-AS 2-Way Remote Start and Keyless Entry Bundle Best Two-Way 2-way remote start and keyless entry, 3-mile range, 5-button remote with LCD |
9.0 | 🛒 Check Price |
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Start-X Remote Start Kit for Push Button Start Vehicles Best for Push-to-Start Plug-and-play remote start for push button start vehicles, 3-button remote |
8.4 | 🛒 Check Price |
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Omega Keyless Entry System with Remote Start (OMEGA-RS-400) Budget Pick 1-way keyless entry and remote start, 1/2-mile range, 4-button remote |
7.8 | 🛒 Check Price |
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EZ-Go Keyless Entry System with Remote Start (EZ-1000) Easiest Install 1-way keyless entry and remote start, 800-ft range, 2-button remote, plug-and-play harness |
8.1 | 🛒 Check Price |
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Autopage C3-RS-735 2-Way Remote Start and Keyless Entry System Long Range Specialist 2-way remote start and keyless entry, 1.5-mile range, 5-button remote with LCD |
7.3 | 🛒 Check Price |
1. Viper 3105V 1-Way Remote Start and Keyless Entry System: Best Overall
The Viper 3105V is a well-regarded system that we evaluated based on its consistent performance and strong owner satisfaction. With a 1-mile range, it reliably locks and unlocks doors and can start your engine remotely. The installation is straightforward for those with basic wiring skills, and the included harness simplifies the process. Owner feedback highlights the system’s durability and the convenience of remote start.
However, the one-way design means you won’t get a confirmation signal that the command was received. If you need two-way feedback or smartphone integration, this may not be the best fit. It’s ideal for drivers who want a proven, no-frills system with remote start, but those seeking advanced features should consider other options.
- Reliable 1-mile range with long-life remote battery.
- Includes remote start functionality for added convenience.
- Easy DIY installation with detailed instructions and pre-wired harness.
Pros: Excellent range and reliable operation.; Remote start adds significant value.
Cons: One-way communication means no confirmation feedback.
2. Avital 4105L 1-Way Remote Start and Keyless Entry System: Best Value
The Avital 4105L offers a cost-effective way to add keyless entry and remote start to your vehicle. In our evaluation, we found it provides solid performance for the price, with a range that typically meets the advertised 1 mile under ideal conditions. Owner reviews often praise its straightforward installation and dependable operation for daily use.
That said, some users report reduced range in dense urban areas or very cold weather. It lacks advanced features like two-way confirmation or smartphone control. This system is best for budget-conscious buyers who need basic keyless entry and remote start without extra bells and whistles. If you require more robust range or feedback, consider spending more for a two-way system.
- Affordable system with reliable 1-mile range.
- Remote start feature works well in moderate climates.
- Simple installation with color-coded wires and online guides.
Pros: Great value for money.; Reliable basic functionality.
Cons: Range may decrease in extreme weather or urban interference.
3. Compustar CS7900-AS 2-Way Remote Start and Keyless Entry Bundle: Best Two-Way
The Compustar CS7900-AS is a premium two-way system that we researched for its long range and comprehensive features. The LCD remote provides confirmation of commands and displays vehicle status, including interior temperature. Based on owner feedback, the system is very reliable and the shock sensor adds peace of mind. The 3-mile range is among the best in its class.
However, this system is more expensive and installation can be challenging for beginners due to the additional wiring for the security features. It’s an excellent choice for those who want maximum range and feedback, but if you’re on a tight budget or prefer a simple DIY install, you might want to look at one-way systems. It’s best suited for enthusiasts who value advanced functionality.
- Two-way confirmation with range up to 3 miles.
- LCD remote shows vehicle status and temperature.
- Includes shock sensor and starter kill for enhanced security.
Pros: Excellent range and two-way feedback.; Advanced security features included.
Cons: Higher price point and more complex installation.
4. Start-X Remote Start Kit for Push Button Start Vehicles: Best for Push-to-Start
The Start-X Remote Start Kit is designed specifically for vehicles with push-button start, offering a plug-and-play solution that doesn’t require wire splicing. In our evaluation, we found it installs in minutes by connecting to the OBD-II port and other harnesses. Owner feedback indicates it works reliably and integrates seamlessly with the factory keyless entry system.
However, compatibility is limited to certain models from Toyota, Honda, Nissan, and Hyundai, so you must verify your vehicle is supported before purchase. It also does not add keyless entry if your car lacks it; it only adds remote start. This kit is ideal for owners of compatible push-button start vehicles who want an easy remote start upgrade. If your car isn’t listed or you need full keyless entry, look elsewhere.
- No cutting or splicing wires; plugs into OBD-II port and other connectors.
- Retains factory key fob functionality.
- Compatible with many Toyota, Honda, Nissan, and Hyundai models.
Pros: Super easy installation for push-button start cars.; Preserves factory security and keyless entry.
Cons: Limited to specific vehicle makes and models; check compatibility.
5. Omega Keyless Entry System with Remote Start (OMEGA-RS-400): Budget Pick
The Omega OMEGA-RS-400 is a budget-friendly option for adding keyless entry and remote start. We researched owner reports and found that while it works for basic needs, the range is often less than advertised, especially in cold conditions. Some users report difficulty with installation due to unclear instructions. The build quality is adequate for the price.
This system is suitable for those who need a very inexpensive solution and are willing to accept compromises in range and reliability. If you live in a cold climate or require consistent performance, we recommend spending a bit more for a system from a more established brand. It’s not ideal for those unfamiliar with car wiring.
- Very affordable price point.
- Includes two 4-button remotes.
- Basic remote start and lock/unlock functions.
Pros: Low cost for a combined keyless entry and remote start system.; Two remotes included.
Cons: Shorter range and less reliable in cold weather.; Installation instructions can be confusing.
6. EZ-Go Keyless Entry System with Remote Start (EZ-1000): Easiest Install
The EZ-Go EZ-1000 is designed for easy installation with vehicle-specific T-harnesses, making it a great option for those who want to avoid complex wiring. In our evaluation, we found that for compatible models, the installation takes less than an hour. Owner feedback highlights the convenience and decent range for everyday use. The system provides basic lock/unlock and remote start functions.
However, compatibility is limited to a specific list of vehicles, and the range is shorter than some competitors. If your car is not supported, you’ll need a universal system. It’s best for drivers who prioritize a hassle-free install and own a compatible vehicle. If you need a universal solution or longer range, consider other options.
- Pre-wired T-harness for many vehicle models simplifies installation.
- Compact remote with good range for most daily use.
- No cutting or soldering required for compatible vehicles.
Pros: Very easy installation for compatible cars.; Good value for the simplicity.
Cons: Limited vehicle compatibility; not universal.; Range can be affected by obstacles.
7. Autopage C3-RS-735 2-Way Remote Start and Keyless Entry System: Long Range Specialist
The Autopage C3-RS-735 offers an attractive feature set with two-way communication and a claimed 1.5-mile range. We researched owner reviews and found mixed experiences: some users report good range and functionality, while others encountered reliability problems such as remote pairing issues or premature failure. The build quality appears to be a concern based on aggregated feedback.
This system may appeal to those who want a long-range two-way system at a lower price than premium brands. However, given the reliability concerns, we recommend it only for buyers who are comfortable with potential troubleshooting and who prioritize range over durability. If you want a rock-solid system, consider spending more on a Compustar or Viper.
- Two-way communication with LCD remote.
- Advertised 1.5-mile range.
- Includes temperature display and remote start.
Pros: Long range with two-way confirmation.; LCD remote shows vehicle status.
Cons: Inconsistent build quality and reliability issues reported.; Customer support can be difficult to reach.
Frequently Asked Questions
Can I install an aftermarket keyless entry system myself?
Yes, many aftermarket keyless entry systems are designed for DIY installation, especially those with plug-and-play harnesses or vehicle-specific T-harnesses. However, universal systems require cutting and splicing wires, which demands basic electrical knowledge and tools. We recommend reading the installation manual thoroughly and checking online forums for your specific vehicle. If you’re not comfortable with car wiring, professional installation is advisable.
Will an aftermarket keyless entry system work with my factory alarm?
Most aftermarket keyless entry systems can integrate with factory door locks and often include a disarm output for factory alarms. However, compatibility varies by vehicle and system. You should check the product specifications or contact the manufacturer to confirm integration before purchase. Some systems require additional adapters for certain vehicles.
What is the difference between one-way and two-way keyless entry systems?
One-way systems send a signal from the remote to the car but do not provide confirmation that the command was received. Two-way systems have a remote that receives a confirmation signal from the car, often displayed on an LCD screen. Two-way systems offer peace of mind but are generally more expensive and have larger remotes.
How important is the range of a keyless entry system?
Range is important if you often park far from your destination, such as in large parking lots. Typical ranges vary from 500 feet to over 1 mile. However, actual range can be affected by obstacles, weather, and interference. For most daily use, a range of 500-1000 feet is sufficient. If you need to start your car from inside a building, consider a system with longer range or smartphone control.
Do aftermarket keyless entry systems affect vehicle security?
Quality aftermarket systems often enhance security by adding features like starter kill relays and shock sensors. However, poorly installed or low-quality systems can introduce vulnerabilities. We recommend choosing a system from a reputable brand and having it professionally installed if you’re unsure. Always ensure the system does not bypass the factory immobilizer.
Our Verdict
After researching and comparing specifications, safety standards, and owner feedback, our top pick is the Viper 3105V for its proven reliability, excellent range, and value. For those who want two-way confirmation and advanced security, the Compustar CS7900-AS is the runner-up, offering long range and comprehensive features. Choose based on your priority: simplicity and value with Viper, or advanced feedback with Compustar.
Last reviewed and spec-checked: March 3, 2026. We re-check our picks and listings periodically.
