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Replacing a Toyota Key Fob Your Toyota key fob is loaded with advanced technology to make it work. This includes remote locking as well as smart keys and other features. It's not surprising then that it could malfunction. It's easy and inexpensive to change the battery in your Toyota keyfob. Just follow the steps below. Battery Toyota key fobs come with a small battery that powers their electronic components and includes the transponder chip that allows you to unlock your car. The battery in your key fob will eventually get worn out and need to be changed. It is simple and inexpensive to replace the battery inside your Toyota key fob. This will restore the functionality. Insert a flat tool, such as a coin or screwdriver into the notch in the case. The two parts of your key fob will be separated by using this tool. On the back of the key fob half there is a circuitboard and the battery. Lift the circuit board gently to reveal the battery and then remove it from the case. Make a note (or take a photo) of the type of battery it is and how it fits in the case, so that you can locate a replacement. Replace the battery with a brand new CR 2032 3V battery and place it in the key fob with the negative side facing downwards. Reassemble the case, and test the key fob to ensure it is working correctly. If it's still not working, repeat the procedure and ensure that the battery and the connectors are in contact. If the key fob doesn't work, it may need to be programmed by a certified dealer. Case Study The case of your Toyota keyfob could need to be changed from time to time. This can happen if the key fob is damaged in any way, or if the battery dies. The replacement of the Toyota key fob is relatively easy. You can locate the replacement case online or in a local hardware store. However replacing the electronics inside is a bit more difficult. Contact the Toyota dealership for more assistance. In the beginning, you must remove your key from the case. This is usually accomplished by pressing the button or sliding the latch. After you have removed the key then look for a tiny notch or slot on the outside of the case. Open the case by inserting an object that is flat like a small screwdriver, into the slot. Once the case is opened, carefully lift up the circuit board in order to expose the battery. Note the nature of the battery and where it is located in the case. You'll need to replace it. You can purchase a new battery from most Lakeland stores. Use car key replacement toyota G28CarKeys or photo as a guide to ensure you buy a replacement battery that is the same model. When you have the new battery, carefully insert it into your key fob. Test it to ensure that it works. Electronics The electronic components on your key fob are what allow it to unlock your car and then start the engine. The components comprise a transmitter, a receiver, and the actual key itself. These devices are all powered by the battery that is in your key fob. You won't be able to access your vehicle in the event that this battery fails. Luckily, it's easy for drivers to change the battery in their Toyota key fobs. This will bring back the functionality of your key fobs and help prevent theft. If your key fob isn't functioning, it could be due to a defective receiver module. These modules are less fragile than the transponder in the replacement key for Toyota and can be easily replaced at a lower cost. It is essential to choose an automotive key repair shop with experience in this field to ensure the replacement is done correctly. To replace the battery on your Toyota key fob, you'll first need to open the case. This is done by inserting a flat-edged tool like an a miniature screwdriver or coin into the notch on the case. Once you have inserted your tool, you'll have to gently separate the two sides of the key fob case. Once the case is removed, you can open it and see the battery. Photograph the battery so you can match it with the new one you buy as a replacement. After you have removed the battery from the old one then put in a brand new CR 2032 3V battery with the negative side up. Make sure the new battery is the exact type as the old one. Reassemble the case after installing the new battery and test it. If your key fob doesn't work, it may need to be reset. It is recommended to bring your vehicle to an authorized Toyota dealer to have this professionally done. Programming If your key fob isn't working after replacing the battery it could be because of the circuit board. In this case it's recommended to buy a brand new Toyota key fob. You can purchase one from the dealership or a locksmith online. If you're confident in making it your own, you can try to modify the key using these steps: The first step is to have a blank Toyota transponder key. It can be purchased from a dealer, a locksmith or an online retailer. Insert the new transponder into the ignition without turning it. Press and release both gas and brake pedals at the same moment. Repeat this for up to 20 seconds, or until the security light on the dashboard turns off. Now you can replace the original key and test it to make sure it works. Toyota key fobs come with an intricate system that utilizes different signals to communicate with the car. These keys are made to communicate only with the vehicle they are inserted into. Reprogramming these keys is time-consuming and expensive, as they must meet legal requirements. If your toyota Aygo replacement key fob isn't functioning, you may need to have the circuit board reset by an auto dealer. It's not an inexpensive option however it will ensure that your key functions effectively and shields your car from theft. If the issue isn't caused by a malfunctioning battery, it can be more costly to fix than replacing the whole key fob. If your toyota Aygo key fob battery is dead or stopped working, you can replace it with a new battery. It's a straightforward process however, you'll need a specific tool to access the inner workings of your toyota key fob. To open the case you must remove the clip from the back of the key fob. Then, gently pry the case off. Replace the old battery with the new CR2032 battery. Be sure to install it correctly. After you have placed the battery in the case, close it by snapping it shut.