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How to Change a Subaru Spare Key If you have lost your Subaru car key, you should call a locksmith. Locksmiths can usually cut you a key for less than the dealer. Subaru car keys are generally either intelligent “push-to-start” fob remote keys, or simply keys made of metal. The Fob key has a chip inside and must be reprogrammed. Keyless Entry System The key fob can be used to lock and unlock your Subaru remotely. It also opens the trunk of your vehicle or the lift gate. These remotes function with the keypad in your car to communicate with the computer system inside the vehicle. Subaru models include a less known feature called PIN Code Access. It allows you to make a unique number sequence to start and open your car. If you own a newer Subaru Forester, Outback, Crosstrek, WRX, WRX STI, or Impreza that comes with this feature, refer to your owner's guide to find out how to use it. It's likely that the battery inside the key fob is dying. You can test the battery life of your key fob with a portable tester or a multimeter in your garage. The next step is to take the key fob out of its case and examine the circuit board that controls the transmitter. It will have one or two sets of 8-digit numbers, so note down the first set so that you are able to recall it later. Once you've done that you can put the key fob back together and you'll be able to program it at home. This procedure differs based on the model and year your car. However, it is generally easy enough to do yourself. Key Fobs Subaru's most recent models include key fobs that can not only unlock doors, but also turn on lights, lock gas cap, and even start the car. That last trick is especially helpful if you've ever arrived at the pump only to discover that your car won't start because the battery for the key fob was dead. It's likely that your Subaru's key fob, whether it's new or old can be replaced easily. It's important to remember that newer models with high levels of technological sophistication may require an appointment at the dealership. With a little effort and time, you can design your own replacement key fob. Start by opening the case and looking at the circuit board of the transmitter. (Instructions on how to open the case are usually provided in the owner's guide). There should be two or more serial numbers with 8 numbers each. Keep the first set of numbers in your wallet for later reference. Then, get into your driver's seat and shut all the doors. Turn the key ten times to start your car, and then switch off. Press the lock button on your key fob, then open the door. This will test whether your doors work correctly. Close the door, then remove the key. The car should beep again, indicating that the key fob has been programmed. Ignition System If your Subaru keys aren't working as they should it could be because the key battery is dead. If you have the knowledge, you can replace the battery of your key fob yourself. Battery replacement is affordable and easy to find. If your key fob won't respond to your commands, it may be a problem with it. To obtain a spare, it's best to visit an authorized dealer. They'll ensure that the key is an original Subaru key, which is covered under warranty, and that it is programmed to your vehicle. This is far safer and simpler than buying an aftermarket key from a business on the internet. You can also have the dealer cut a new key if you provide them with your VIN number and proof of ownership. They'll use this information to code the replacement key to ensure that it will be accepted by your immobilizer. This process is more involved than cutting a new one, and dealers will typically charge a higher price for this service. After the new key has been programmed and you're able to switch it to your current key. It will take only five seconds to insert the new key, so make sure to keep your working key close at the ready. You can remove the key after the security light stopped flashing and you can test it. Battery Replacement One of the most important characteristics that make Subaru fobs so valuable is their ability to switch on your car's power windows as well as sunroof with just a press of the button. The battery in your Subaru fob isn't built to last forever, and it will need to be changed eventually. The good news is that replacing the battery is a straightforward procedure that you can do yourself with the help of this short guide from Capitol Subaru. You'll first need to find the small gap that divides the front from the back of your keyfob. With a small flathead screwdriver, you can pop the seam to reveal a small compartment inside which is the battery. Install the new battery and ensure it is facing correctly. Remove the old one. Once everything is assembled and in place, you can use your new key fob to lock or unlock your vehicle without difficulty! You should always have a spare set keys, especially if yours is broken or has gone missing. You can buy a new key from your local dealership or get it cut by locksmiths. Whatever you choose, it's essential to get your key fob functioning properly in the shortest time possible to allow you to drive in a safe manner!