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Replacing a Subaru Car Key With an Unresponsive Button Replace the battery if you own a Subaru key that isn't responding. The service department at Capitol Subaru can help you with this simple process. Open the case for the key fob and locate the transmitter circuit board. Look for two sets of 8-digits and write the first set on a piece of paper. Keyless entry A keyless entry system allows you to unlock your Subaru's trunk and doors without having to use the traditional mechanical key. The car's computer detects presence of the key fob by sending radio signals and then sends an indication to unlock the doors or opening the trunk. The system can also be used to stop or start the engine. Certain advanced systems also offer remote starting, smartphone connectivity and alarms. If you have lost your Subaru key fob, a reputable locksmith will create the replacement. They can make high-security keys, which are more difficult to duplicate. They may also use laser-cut keys with complex designs that require specialized equipment. They can help you pick the appropriate key for your vehicle and then install it. Find out what kind of key you have. Open the fob case, and then examine the circuit board that controls the transmitter. You will likely see one or two numbers with 8 digits. Write down the number, then close the fob case. You'll hear the chime, and see the dome lights flash. Transponder key If you own a Subaru that includes keyless entry, you must learn how to replace the battery inside the key fob. You can use a screwdriver with a flat head to open the case of your car key fob, and then remove the old battery. Then you can replace it with a new one. Install the new battery with the correct side of it inside the case. A transponder key (a blend of responder and transmitter) includes a microchip which communicates with your vehicle's ECU when it's activated. The chip is equipped with a serial number that's specific to your vehicle. It's also a security measure that stops key duplicates. A locksmith can program a transponder keys for you, but it's better to select an automotive locksmith who is equipped and knowledgeable to perform the procedure correctly. If you do it wrong, you could cause damage to the transponder chip inside your car keys which could cost you thousands of dollars in repairs. To program a key, you must open and close the driver's door and then turn the car's ignition off and then on. Repeat the process 10 times. You'll hear a chime on the instrument panel after the tenth repetition. Keys that are cut in the side A growing number of vehicles are equipped with side cut keys, which are also known as laser-cut keys. These keys are more secure than standard car keys. subaru outback key replacement cost of the keys are shaped to correspond with the profiles of the tumblers of the lock. This type of key requires a specialized machine to duplicate. To program a Subaru Key Fob, find the transmitter circuitry within the key fob. (Instructions are usually in the owner's manual). Look for one or more sets of 8-digit numbers on the board. Write these numbers down to keep them handy. Close your doors 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. If you've got a replacement fob and you have it, you can replace the battery on the key fob of your Subaru with ease. Find small grooves in the seam that runs between the front and back of the fob encasement. Utilize a small flathead screwdriver to break this encasement open, then remove the smaller unit inside. Replace the old battery with a new CR2025and ensure that it's inserted correctly. Last-cut key Unlike traditional metal car keys These keys let you unlock your doors from up to a few yards away. They also allow you to start the engine. The newer models of keys include a carbon chip inside that emits an electronic signal. This adds another layer of security that makes your Subaru more difficult to steal. Some drivers prefer having an old-fashioned key as a backup. If your key fob isn't working, you may need to replace the battery. If that doesn't work, then you must visit Hanson Subaru or another trusted locksmith for assistance. This key is similar to the Honda high-security HO01 or the HO03. This is similar in design to the Honda high-security HO01 and HO03. This kind of key has four tracks and is externally cut. It is possible to duplicate this key with standard tools from locksmiths and hardware stores. However it doesn't have any onboard programming. It is possible to purchase this kind of key at most dealerships, but you should be aware that it may cost more than a key with an edge cut. Key code Subaru key fobs are equipped with the security chip used to secure and unlock your car. When the key is inserted into the ignition, it transmits an electronic signal to a receiver on your dashboard. This signal is specific to the key and if it is not recognized, the engine will not start. If the key fob you have isn't working it's possible that it's the time to replace the battery. Find the eight-digit number of your vehicle prior to being able to program a Subaru key. The code can be found on the original ring tag or on Subarunet. Once you have the code, open and close your driver's door, and then press the lock button a number of times that equals the number in the code. Next put the new key into the ignition and move it to the “on” position, but don't start the engine. Once the key fob has started working, the security light should cease to flash. If not, you should replace the battery or contact an expert locksmith to resolve the problem.