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Mazda 2 Key Fob Replacement It can be frustrating when a device stops functioning. However, this is a fairly frequent issue that can be fixed easily. It is usually a simple matter of replacing the batteries. Batteries can be found for replacement at the majority of hardware stores and big-box retailers. You can also check your owner's manual as well as on YouTube for instructions on how to open the fob and replace the battery. What is a keyless system? The keyless entry system that you have in your car is a remote-control system that allows you to lock and unlock your vehicle without the need to insert your keys. The keyless entry system is typically located on a keyfob or integrated into the ignition key handle. Some models offer the option to remotely secure the tailgate and trunk. The system transmits radio signals to the computer in your car. The car analyzes the radio signal to determine if it is the right key. If it's a valid key the doors will open automatically, and the engine will begin. The key fob can also contain the transponder or security chip to prevent the vehicle from starting if an incorrect key is used. While keyless entry systems are convenient, they do have a few drawbacks. They can be accidentally activated by children playing with them, or switched on when the owner isn't there in the car. This can cause the power windows and other features to function without the owner's permission or knowledge and could even set off the car alarm. Another issue is that there are a myriad of ways that thieves could breach the security of keyless entry systems and hack into the computer of your vehicle to make it believe your key fob is near enough to start the car. It is important to always have a fob or backup key. How do I change my keyless entry system? If your car's key fob battery is dead while you're on the moving, it can be a major inconvenience. It's easy to change the battery on the Mazda 2 flip key transponder. You will need to know the best method to open the key fob and what kind of battery you should buy. Make use of a tape-wrapped screwdriver gently pry open the case by working from one side to the other. Be careful not to damage it. Once the case has been removed, you can remove the old battery. Place the case in a place so that you don't forget it. Replace the battery, ensuring to align it so that the positive side faces towards the upwards. It's also a good idea to note down the code number on the reverse of your manual key, to allow you to programme the replacement fob using it. While you can duplicate an old metal key at a hardware store many of the latest smart keys require programming by a locksmith or dealer. The cost of replacing a fob, programming or mechanical keys for backup can add to the total. If you have an auto club membership or insurance policy, you should check to see if it's enough to pay for the cost. You may be able to save some money by getting an aftermarket fob on the internet and having it programmed by a locksmith, rather than the dealership. How do I program my keyless entry system? In general the same steps are used to program key fobs on most major car brands. The procedure for certain models might be different and may require specialized hardware or computer software. In those cases, it would be best to refer to the manual or consult an authorized dealer for more assistance. Make sure you have the equipment and materials you need prior to beginning. It is recommended to also read the instruction manual for the keyless entry system in order to gain a better understanding of how it functions. The installation is relatively easy, but you will need to remove the cover from the steering wheel in order to access the wires that are required for connection. Wrapping the wires with electrical tape will protect and protect them from damage. To program a key fob for the new vehicle, insert the original ignition key and turn it to the “ON” setting (not the “start” or “run”) When the key is in ignition you must simultaneously press and hold both the unlock and lock button on your new remote for at least 30 minutes. If you do it correctly, the car will sound a chime, and the process of programming will be successful. After programming a new keyfob successfully, switch the ignition to “OFF” and test all buttons to ensure that they work. How do I change the battery on my keyless entry system? Replace the batteries in your keyfob every couple of years or if you notice that it is less responsive. This task can be accomplished in less than 10 minutes. Most of the time you won't even have to modify your key fob's settings after replacing the battery. First, you'll want to ensure that you have the appropriate type of battery available. The battery's type should be noted on the key fob, if you flip it over. If it's not it is possible to use a small flat-head screw driver to remove the key fob and examine inside. Typically, mazda demio key use CR-1620 batteries that are readily accessible at a variety of stores such as Home Depot, Walmart, & AutoZone. After you've removed the mechanical key from the key fob you can open it with the help of a screwdriver with a flathead or your fingernail. Remove the old battery, replacing it with the new one you bought previously. Make sure the new battery has its positive (+) side facing up Then, reassemble the two sides of the key fob and snap them to seal it. Certain key fobs require programming that can only be done using a special tool that an automotive locksmith or dealer has access to. However, non-transponder keys are not required to be programmed, which makes them an excellent choice for people who don't have tools needed to program their vehicle.