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Replacing a Toyota Key Fob Your Toyota key fob has many advanced technologies that allows it to function. This includes remote locking and smart keys, along with other features. It's not a surprise that it can malfunction. Fortunately, replacing the battery in your Toyota key fob is easy and cheap. Follow the steps below. Battery Toyota key fobs are powered by a tiny battery that powers the transponder and electronics chip that allows you to unlock your vehicle. The battery in your key fob will eventually wear out and will require replacement. It's simple and affordable to replace the battery on your Toyota key fob. This will restore the functionality. You can open the case of your key fob by inserting a flat instrument such as a screwdriver or a coin into a notch on the case. This will pry apart the two halves of the key fob's case. On the back of one of the key fob's halves, you will see a circuit board and a battery. Lift the circuit board gently to reveal the battery, then remove it from its case. Make a note (or take a picture) of the kind of battery it is and how it is placed inside the case, so that you are able to find a replacement. Replace the battery with an CR2032 3V replacement and then insert it into the key fob, with the negative end facing down. Reassemble the case and test the keyfob to make sure it functions. If it's still not working, repeat the procedure and ensure that the connections and battery are in contact. If the key fob does not work, it might require programming by a certified dealer. Case Study Occasionally the case of your Toyota key fob may need to be replaced. This could happen in the event that the key fob has been damaged in any way or if the battery dies. Replacing the Toyota key fob is relatively easy. You can locate an appropriate case online or at an in-store hardware store. However, replacing the electronics within is a bit more difficult. For further assistance, contact the Toyota dealership. In the beginning first, you need to take your key out of the case. This is usually accomplished by pressing the key or sliding an latch. After the key is removed then look for a small slot or notch on the side of the case. Open the case by inserting a flat tool like a small screwdriver, into the slot. After the case has been opened then carefully lift the circuit board to expose the battery. Take note of the kind of battery it is and where it is placed in the case, as you will have to replace the battery. You can purchase a brand new battery from most Lakeland stores. You can use the battery you have or a picture of it, to help you on the purchase of a new. When you have received the new battery, you need to carefully insert it into your keyfob. Make sure to test it to confirm that it is working. Electronics The electronic components of the key fob will allow it to unlock your car and start the engine. The components include the transmitter, receiver, and the physical key. These devices are all powered by the battery in your key fob. You will not be able access your vehicle if this battery fails. Luckily, motorists can replace the battery on their Toyota key fobs. This will make them function properly and reduce the chance of theft. If your key fob doesn't work, it could be due to an issue with the module. In contrast to the transponder chip found that is found in a toyota Aygo replacement key they aren't as delicate and can be replaced for a cheaper cost. G28CarKeys is essential to choose an auto repair shop that is experienced in this area to ensure the replacement is done correctly. To replace the battery in your Toyota key fob, you'll need to open the case. This is done by inserting a flat-edged tool like a mini screwdriver or a coin into a prominent hole in the case. Once you have inserted the tool, you have to gently pull the two halves apart. Once the case is separated from the circuit board and view the battery. Take a picture of the battery and compare it with a new one in case you have to replace it. After taking out the old battery, replace it with the new CR2032 3V battery. Make sure that the negative side is facing downwards. Make sure the new battery is the exact model as the previous one. Once you have the new battery installed the case, you can reassemble it and test it. If the key fob does not work after reprogramming, it might need to be replaced. It is best to take your vehicle to an authorized Toyota dealer to have this work done professionally. Programming If your key fob still doesn't work after replacing the battery it could be due to the circuit board. In this case you'll need to buy the new Toyota key fob. You can purchase one on the internet, from a locksmith or at the dealership. If you're comfortable doing it yourself you can attempt to reprogram the key by following these steps: You will need a blank Toyota Transponder Key. This can be obtained from a dealer, a locksmith or an online retailer. Install the new transponder in the ignition without turning it. Press and release the brake pedal as well as the gas pedal at the same time. Do this up to 20 seconds or until the dashboard security light turns off. You can then replace the original key and test it to make sure it is working. Toyota key fobs come with an intricate system that utilizes different signals to communicate with the car. They are made to work only with the vehicle they are placed in. This is why reprogramming them can be costly and time-consuming, as they must comply with the lawful requirements. You might need to have the circuit board of your Toyota replacement key fob reprogrammed by an auto dealer if it's not working. This is not an inexpensive alternative, but it will ensure that your car keys function correctly and will prevent theft. It's more expensive to repair the fob if the issue isn't the result of a damaged battery. If your toyota aygo key fob battery has gone out of service or has stopped functioning, you can replace it with a new battery. It is a simple process however, you'll require an instrument that is specifically designed to access the inner workings on your toyota key fob. To open the case, you'll need to remove the clip on the back of the fob, and then gently pry it apart. Replace the old battery by the new CR2032 battery. Be sure to install it correctly. After inserting the battery, you should close the case and snap it together.