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Replacing a Subaru Car Key With an Unresponsive Button Replace the battery if there is a Subaru key that isn't responding. Capitol Subaru's service department Capitol Subaru can help you with this simple procedure. Open the key fob and locate the circuit board. Look for two sets of numbers with 8 digits and note the first one on a piece of paper to refer to later. Keyless entry A keyless entry system allows you to unlock your Subaru's doors and trunk without the need for the traditional mechanical key. The car's computer detects presence of the key fob using the radio signal and sends an alarm that unlocks the doors or opening the trunk. The system can also be used to start or stop the engine. Some of the more advanced systems include the ability to connect your smartphone to alarms, connectivity to your smartphone, and remote starting. If you lose your Subaru key fob an experienced locksmith will create the replacement. They can create high-security keys that are more difficult to duplicate. Additionally, they can make laser-cut keys that have intricate designs that require special equipment. They can also assist you to determine the right key for your vehicle and install it for you. Find out which replace subaru key fob G28 Car Keys of key you have. Open the fob case, and check the circuit board for the transmitter. You will see one or two numbers of 8-digits. Close the fob case and write down the number. You'll hear a chime on the instrument panel and notice that the dome lights blink. Transponder key If you have a Subaru with keyless access, you'll need to learn how to replace the battery on the key fob. Use a flathead to take the battery that was on the key fob of your car. You can then replace it with a brand new one. Make sure that you place the new battery inside the case with the correct side facing upwards. A transponder key (a blend of transmitter and responder) is a microchip that communicates with your vehicle's ECU when energized. The chip is equipped with a serial number that's unique to your vehicle. It's also a security function which prevents duplicate keys. A locksmith can program a transponder key for you, but it's better to go with an automotive locksmith that has the tools and expertise to do it correctly. An incorrect procedure could cause damage to the transponder chip within the car key, which could cost you money for repairs. To program a car key you must first shut and open the door to the driver's side, then switch off and turn on your ignition. Repeat the process 10 times. You'll hear a chime on the instrument panel after the 10th repetition. Keys that are cut in the side The majority of cars are equipped with side cut keys, also known as laser-cut keys. These are a more secure version of the traditional keys for cars. The key's edges are shaped to match the profile of the lock's tumblers. This kind of key requires a particular machine to duplicate. To program the Subaru key fob first find the circuit board for the transmitter inside the key fob (instructions are in your owner's manual). Find one or more sets of 8-digit numbers on the board. Note these numbers down to keep them in mind. Close your front door and get in the driver's seat. Insert the new key into the ignition and turn the knob to the first position. After 10 seconds the car will begin to unlock and start. When you have a spare fob, you can replace the battery in the key fob of your Subaru with ease. Find small grooves in the seam between the front and back of fob encasement. Use a small screwdriver to pry this closed encasement, then remove the smaller unit inside. Replace the battery that was damaged with a new CR 2025, ensuring that it's inserted correctly. Last-cut key Unlike traditional metal car keys, these fobs permit you to open your doors from a distance of a few yards away. The fobs can also be used to start the car. The newer keys have a carbon chip that emits an electronic signal. This is an additional layer of security that makes your Subaru more difficult to take. Some drivers prefer to have an old-fashioned key as a backup. If your key fob isn't working then you can replace the battery. If that doesn't work, you should go to Hanson Subaru or another trusted locksmith for assistance. If your Subaru is a late model and has keys that are laser-cut. This key is similar to Honda's high-security HO01 and the HO03. This kind of key has four tracks and is externally cut. It can be duplicated with standard tools available at locksmiths and hardware stores. However it doesn't have any onboard programming. It is possible to purchase this kind of key from most dealers, but you should be aware that it will cost more than an edge-cut key. Key code Subaru key fobs are equipped with security chips that are used to secure and unlock your car. When you insert the key into the ignition, it sends signals to a receiver on your dashboard. The unique signal from the key must be recognized by the dashboard's receiver in order to start the engine. If your key fob isn't functioning it could be time to replace the battery. Find the eight-digit code on your vehicle prior to being able to program the Subaru key. The code can be found on the original ring tag or on Subarunet. Once you have the code, open and close the door for the driver's side. Then press the lock button the number of times that corresponds to each digit. Then you can insert the new ignition key and turn it on. Don't start the engine. The security light should stop blinking when the key fob starts to function. If not, you should replace the battery or consult a professional locksmith to help you solve the issue.