Upgrade Your 2015 Subaru Legacy’s Security with Keyless Entry: A DIY Guide

If you own a 2015 Subaru Legacy and want to upgrade your car’s security system, investing in keyless entry is a great option. Keyless entry is not only convenient, but it also offers an added layer of security to your car. This article will provide you with step-by-step instructions on how to install keyless entry in your Subaru Legacy, the tools required for installation, common mistakes to avoid, and troubleshooting tips.

Benefits of Keyless Entry

Keyless entry offers many benefits over traditional keys. With keyless entry, you can unlock the car remotely, which is particularly useful if you are carrying groceries or other heavy items. Additionally, keyless entry enhances the car’s overall security by making it virtually impossible for a thief to break in. Most keyless entry systems require a specific code or recognition of the key fob in order to grant access, making it very difficult to break into a car with keyless entry.

Tools Required for Installation

Before you begin the installation process, you will need to gather the following tools:

  • Keyless entry kit
  • Screwdrivers (flathead and Phillips)
  • Pliers
  • Wire cutter/stripper
  • Electrical tape
  • Pen
  • Notepad

Step-by-Step Installation Process

  1. Purchase a keyless entry kit for your 2015 Subaru Legacy. Some popular keyless entry kits are the Scytek A20 and the Viper 3121V.
  2. Locate the control lock on your Subaru. The control lock is usually located near the driver’s seat or in the center console.
  3. Remove the control lock by using a Phillips head screwdriver.
  4. Locate the wires connected to the control lock and use pliers to remove them. Remember which wire goes where by taking a photo or writing them down.
  5. Connect the keyless entry kit’s receiver wires to the corresponding wires that you just removed from the control lock. Use pliers to secure the wires in place.
  6. Connect the keyless entry kit’s power wires to your car’s battery. The power wires are usually red and black and are labeled accordingly. Use electrical tape to secure them in place.
  7. Test your keyless entry system by locking and unlocking your car from a distance. If the system works, reassemble the control lock.
  8. Program your key fobs by following the instructions in the kit. Most key fobs have programming instructions printed on them.
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Common Mistakes to Avoid

One of the most common mistakes people make when installing keyless entry is failing to connect the correct wires to the receiver. Make sure to take a photo or write down which wires go where to avoid confusion. Additionally, it’s important to test the system thoroughly before reassembling the control lock. Double-check that the power wires are securely connected to the battery as well.

Troubleshooting Tips

If your keyless entry system is not working properly, here are some troubleshooting tips:

  • Check to make sure the power wires are connected securely to the battery.
  • Make sure the receiver is connected to the correct wires on the control lock.
  • Check the programming instructions on the key fob to make sure it’s programmed correctly.

Where to Buy and Cost

You can purchase keyless entry kits online or at your local car shop. The cost can vary depending on the brand and quality of the kit, but you can expect to pay anywhere from $50 to $150.

Is It Legal to Install Keyless Entry in a Car?

As long as the keyless entry kit is properly installed and does not obstruct the driver’s vision or safety, it’s legal to install keyless entry in a car.


Installing keyless entry in your 2015 Subaru Legacy may seem daunting, but it’s a relatively simple process that you can do yourself. With keyless entry, you’ll enjoy added convenience and security. Just make sure to gather all the necessary tools, follow the steps carefully, and test the system thoroughly before hitting the road. With this DIY guide, you’ll be able to upgrade your Subaru’s security system in no time.

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Davis Bellew

As a Subaru owner and enthusiast, Davis has a deep understanding of the needs and concerns of Subaru drivers. He specializes in writing informative and engaging content about Subaru maintenance and repair, and his articles are always well-researched and easy to understand. When he's not writing, he enjoys hiking and photography.

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