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Replacing a Toyota Key Fob Your Toyota key fob has a lot of complex technology that allows it to function. This includes remote locking as well as smart keys and other features. So, it's not surprising that things can go wrong. Fortunately replacing the battery on your Toyota key fob is easy and affordable. Just follow the steps below. Battery Toyota key fobs contain small batteries that power their electronics, including the transponder chip, which allows you to unlock your car. As you use your key fob and the battery eventually wear out, and it will need to be replaced. It's easy and affordable to replace the battery inside your Toyota key fob. This will restore its functionality. Insert any flat tool like a screwdriver or coin, into the notch on the case. This will open the two halves of the case for your key fob. On the back of one of the key fob half, you will see an electronic circuit board as well as a battery. Carefully lift the circuit board to expose the battery and then remove it from the case. Take a picture or note the battery's type and where it sits inside the case to replace it. Replace the battery with a new CR 2032 3V battery, and then place it inside the key fob with the negative side facing down. Reassemble the case and test the key fob to make sure it functions properly. If it's still not working then repeat the test to ensure that the connections and battery are in contact. If the key fob still doesn't work after all this, it may need to be programmed. Case Study The case of your Toyota key fob might need to be changed every now and then. The key fob can be damaged or the battery could be dead. Replacing a Toyota key fob case is relatively easy. You can find the replacement case on the internet or at the local hardware store. The electronic components inside are more difficult to replace. For assistance, call the Toyota dealership. First, you must take the key out of its case. This is typically done by pressing a key or sliding the latch. After the key is removed you will find an opening or notch on the outside of the case. Insert toyota spare key G28CarKeys like a screwdriver into this notch and then open the case. After the case has been opened, carefully lift the circuit board to reveal the battery. Note the type of battery and where it is located inside the case. It is necessary to replace it. The majority of Lakeland stores offer new batteries. Take the battery you have in the past or photo as a guide to ensure that you purchase a replacement that is identical to the original. When you have the new battery, carefully insert it into your key fob. Then, test it to ensure that it works. Electronics Your key fob's electronic components are what allow it to unlock your vehicle and start the motor. The components include the receiver, transmitter, and the physical key. Each of these devices is powered by the key fob battery. If the battery is damaged and you lose power, you won't be able to access your vehicle. Luckily, motorists can replace the battery on their Toyota key fobs. This will allow them to function again and prevent the risk of theft. If your key fob isn't functioning it could be due to a faulty receiver module. These modules are less fragile than the transponder found in the replacement key for Toyota and can be repaired for a lesser cost. It is crucial to select an automotive key repair shop with experience in this field to ensure the replacement is done properly. To replace the battery on your Toyota key fob, you'll first have to open the case. This is accomplished by inserting a flat tool, such as an a miniature screwdriver or coin into a noticeable hole in the case. Once you have inserted the tool, you have to gently pull the two halves of the case apart. When the case is removed, you can remove the circuit board to reveal the battery. Take a picture of the battery and compare it with a brand new one if you need to replace it. Once you have removed the old battery and replaced it with a new CR 2032 3V battery with the negative side down. Make sure the new battery is the same type as the old one. Once you have the new battery in the case, you can reassemble it and test it. If your key fob doesn't function after reprogramming it then it could require replacement. This will need to be done by a professional. Therefore, it is recommended that you have this done at an authorized Toyota dealer. Programming If you have replaced the battery on your key fob, but it still doesn't work the issue could be with the circuit board. In this case you need to purchase an entirely new Toyota key fob. You can purchase one on the internet, from a locksmith, or at the dealership. If you feel confident doing it yourself, you can try to modify the key using these steps: You will need an uncut Toyota Transponder Key. This can be obtained through a dealer, locksmith, or an online source. If you have a new transponder, you need to insert it into the ignition, but don't turn it. Press and release the brake pedal and the gas pedal simultaneously. This should take about 20 seconds or until the security light on the dashboard turns off. You can then replace the original key and test it. Toyota key fobs use a complex system to communicate with cars. These keys are made to work only with the vehicle that they are placed in. Reprogramming the keys can be time-consuming and expensive, as they must be in compliance with legal requirements. If your toyota Aygo replacement key fob is not functioning, you may need to get the circuit board reprogrammed by an auto dealer. It's not cheap, but it will ensure that your key works properly and protects your car from theft. If the issue isn't caused by a damaged battery, it can be more expensive 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 simple procedure however, you'll need a specific tool to get to the inner workings of your key fob. To open the case you must remove the clip from the back of the key fob. Then, gently pry the case open. Replace the old battery by a new CR2032 battery. Make sure you install it correctly. After inserting the battery, you should close the case and then snap it back together.