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Replacing a Subaru Car Key With an Unresponsive Button If you have a Subaru car key with an inactive button, it could be time to replace the battery. 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 8-digit numbers and note the first one on a piece paper to reference later. Keyless entry With a keyless entry system, you can unlock the trunk and doors of your Subaru without the use of an actual key. By using a radio signal, the car's computer can detect the presence of a key fob within a certain distance and send an alert to unlock your doors or open your trunk. You can also turn on or off the engine with this system. Some advanced systems even offer remote starting, smartphone connectivity and alarms. subaru smart key is able to design an alternative Subaru key fob if you have lost yours. They can create high-security keys, which are more difficult to duplicate. Additionally, they can make laser-cut keys that have intricate designs that require special equipment. They can help you select the correct key for your car, and then install it. Find out which type of key you currently have. Then, you can open the fob's casing and examine the circuit board for the transmitter. You will see one or two numbers that are 8-digits. Close the fob case, and write down the number. You'll hear the chime, and see the dome lights flash. Transponder key If you own a Subaru that features keyless entry, you will need to know how to change the battery inside the key fob. Use a flathead to take the battery that was on the car key fob. Then, replace it with a brand new one. Be sure to place the new battery in 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 it's activated. The chip contains a unique serial number for your vehicle. It's also a security measure that stops key duplication. A locksmith can program a transponder key for you, but it's better to select an automotive locksmith that has the tools and expertise to perform the procedure correctly. An incorrect procedure could cause damage to the transponder chip in the car key, which could cost you money for repairs. To program a car key you must first open and shut the door for the driver's side. then turn off and on your ignition. Repeat the process 10 times. You'll hear a chime in the instrument panel after the tenth time. Side-cut key The majority of cars come with side cut keys, also referred to as laser-cut keys. These keys are more secure than standard car keys. The edges of the key are shaped to match the profiles of the tumblers of the lock. This kind of key requires a special machine to duplicate. To program a Subaru key fob first, locate the transmitter circuit board inside your key fob (instructions should be included in your owner's manual). Find one or more sets of 8-digit numbers on the board. Write down these numbers to keep them in mind. Close your front door and get in the driver's seat. Then, insert your new key in the ignition and change it to the original position. After 10 seconds, the car will start to unlock. If you've got a replacement fob, you can replace the battery in your Subaru's key fob without difficulty. Find a small hole in the gap between the front and back of the fob encasement. Make use of a small flathead screwdriver to pry the encasement off, then remove the smaller unit within. Replace the old battery with a new CR 2025, ensuring that it's inserted correctly. Last-cut key These keys are more convenient than traditional keys due to the fact that they are able to open the doors to your car at a distance of many yards. They also allow you to start the engine. These newer types 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 take. However, some drivers still prefer to have an old-fashioned key as a backup. If your key fob stops working then you can replace the battery. If that doesn't work, then you should visit Hanson Subaru or another trusted locksmith for assistance. If your Subaru is an older model, it may have an engraved key. This key is similar to Honda's high-security keys HO01 and HO03. This kind of key has four tracks and is externally cut. It is possible to duplicate this key using standard tools from hardware stores and locksmiths. However, it does not have any onboard programming. This kind of key is sold at the majority of dealerships. However, it will cost you more than a cut-off one. Key code Subaru key fobs are fitted with a security microchip which can be used to lock or unlock your vehicle. When the key is inserted in the ignition and a signal is transmitted to a device located on the dashboard. This signal is unique to the key, and if it is not recognized, the engine will not start. If your key fob won't work, it could be time to replace the battery. Find the eight-digit number of your vehicle prior to you program the Subaru key. The code is on the original ringtag or on Subarunet. Once you have the code, you can open and close the door to your car, then press the lock button a number of times equal to each digit in the code. Then put the new key into the ignition and move it to the “on” position, but don't start the engine. The security light should cease to blink once the key fob begins to work. If the security light continues to shine then you might need to replace the battery. You may also contact locksmiths for assistance.