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Mazda 2 Key Fob Replacement While it is frustrating to have a fob stop working, it's common and can be repaired. It is usually a simple matter of replacing the batteries. Batteries for replacement are available at a variety of hardware stores and big-box retailers. You can also check the owner's manual, or on YouTube for instructions on how to open the fob and replace the battery. What is a keyless system? The keyless entry system inside your vehicle is a remote control system that lets you to lock and unlock your car without the need to physically insert keys. It's typically on a key fob, or built into the ignition key handle. Some models offer the option of remotely locking the trunk and tailgate. The system operates by transmitting an audio signal from the key fob to your car's computer. The car reads the radio signal to determine if the key is the right key. If it's the correct key it will unlock the doors automatically and the engine can begin. The key fob itself comes with a security chip, or transponder, which prevents the car from starting if a wrong key is used. Keyless entry systems have their advantages and drawbacks. Children can accidentally activate them by playing with them, or they can be turned on even if the owner isn't in the vehicle. This could cause the power windows and other features to operate without the knowledge or consent of the owner, and it may even trigger the car alarm. Another concern is that there are a myriad of ways thieves could break the security of keyless entry systems and even hack your vehicle's computer to make it believe that your fob is close enough to be able to start the car. It is important to always have a working backup key or fob. How do I replace my keyless access device? It could be a huge inconvenience if your key fob battery goes out while you're traveling. Fortunately, replacing a Mazda 2 transponder flip key's battery is pretty simple. It's just a matter of knowing how to open the key fob and what kind of battery to purchase. You'll want to use a flathead screwdriver with tape wrap to pry open the case, starting with one side and then the other side, using it gently to avoid breaking it. After the case has been opened it is possible to remove the battery that was in it and put it in the case in a place where you will not lose it. Replace the battery, making sure to position it so that the positive side faces upwards. It's also a good idea to write down the code number on the back of your manual key in order to programme the replacement fob using it. While you can duplicate a key made of metal at a hardware store, many of the latest smart keys require programming by an expert locksmith or dealer. The cost of a replacement fob, programming and mechanical keys for backup can add to the total. Make sure to check your warranty or auto club membership or insurance policy to see whether they will pay for the cost. You might be able save some money by getting an aftermarket fob on the internet and having it programmed by a locksmith, rather than a dealership. How do I program my keyless entry system? In general, the same steps are used to program key fobs on most major auto brands. The procedure for certain models may differ slightly and require special hardware or computer software. In these instances you should consult the manual or contact a dealer for more assistance. Make sure you have all the tools and materials you need before starting. It is recommended to go through the instruction manual for the keyless entry system in order to get more understanding of how it functions. The installation is relatively easy however, you'll need to remove the steering wheel cover to gain access to the wires required for the connection. Once you have all the wires in place, it is crucial to wrap them in electrical tape to protect them and provide insulation. To program your new key fob insert the original key into the ignition and then turn it to the “ON” position (not the start or run position). While the key is in the ignition you must simultaneously press and hold both the unlock and lock button on your new remote for a minimum of 30 seconds. If you do it correctly, your car will sound a bell and the process of programming will be successful. After successfully programming the new key fob, switch the ignition back to the “OFF” position and test all buttons to make sure they work correctly. How do I change the battery on my keyless entry system? Every few years, or when the key fob is becoming less responsive, you'll have to replace the batteries on your key fob. This is a simple job that can be accomplished within a matter of 10 seconds. Most times, you don't even need to modify your key fob's settings after replacing the battery. In replacement mazda 2 key , you'll want make sure you have correct type of battery available. If you flip the key fob over it, you should see the name of the battery on it. If it's not legible, you can use a small flat-head screw driver to remove the key fob and examine inside. Typically, key fobs use batteries CR-1620 that are available at many stores including Home Depot, Walmart, & AutoZone. Once you have removed the mechanical key from the key fob, you can easily open it by making use of a flathead screw driver or your fingernail. Remove the old battery, and replace it with the one you bought previously. The positive (+) side of the new battery must be facing up. Reassemble the two sides and snap it shut. Certain key fobs require programming. This can only be accomplished using a specific tool, which is only available to locksmiths in the automotive industry or dealers. However, non-transponder keys do not need to be programmed, which makes them an excellent choice for people who don't have tools to program their car.