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Mazda 2 Key Fob Replacement It can be very frustrating when a device stops working. However, this is a fairly common problem and is easy to fix. Usually, it is just a matter of replacing the battery. You can find replacement batteries in a wide range of hardware stores as well as big-box retailers. There are also instructions in the owner's manual, or on YouTube on how to replace the battery by opening the fob. What is a keyless entry system? The keyless entry system in your car is a remote control system that enables you to lock and unlock your vehicle without having to physically insert the keys. The keyless entry system is usually mounted on a keyfob integrated into the ignition key handle. Some models offer the option to remotely lock the trunk and tailgate. The system transmits a radio signal to the computer in your car. The car will then analyze the signal to determine whether it is the correct key. If it's a valid key the doors will open automatically, and the engine will begin. The key fob in itself contains an integrated security chip, also known as a transponder, which prevents the vehicle from starting if the wrong key is used. mazda keys replacement G28CarKeys have their pros and disadvantages. Children may accidentally activate them when playing with them, or they could be turned on even if the owner isn't in the vehicle. This can cause power windows and other functions of the vehicle to operate without the owner's knowledge or consent, and may even set off the alarm. Another concern is that there are a multitude of ways thieves can breach the security of keyless entry systems and even hack the computer system of your vehicle, making it believe that your key fob is near enough to allow you to start your car. It is vital to have a fob or backup key. How do I change my keyless entry system? It could be a huge inconvenience if your key fob's battery fails while you're traveling. It's simple to change the battery on the Mazda 2 flip key transponder. It's just a matter of knowing how to open the key fob and which kind of battery to purchase. Use a screwdriver with tape wrap to gently pry open the case and work from one side to the other. Be careful not to break it. Once the case is 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, orienting it to ensure that its positive side is facing upwards. You can also program the replacement fob by writing down the code from the back of the manual key. While you can duplicate a key made of metal at a hardware shop, many of the latest smart keys require programming by a locksmith or dealer. The cost of a replacement fob, programming and mechanical keys for backup can increase the total. If you have an auto club membership or insurance policy, you should check to see if it can cover the cost. You could be able save some money by getting an aftermarket fob online and having it programmed by a locksmith, rather than the dealership. How do I program a keyless entry system to my home? In general, the same procedure can be used to program a key fob for most major car models. The process for certain vehicles may differ slightly and may require specialized hardware or computer software. In these instances, you should consult the manual or call a dealer for more assistance. Make sure you have all the equipment and materials you need prior to beginning. It is recommended to also study the instruction manual for the keyless entry system in order to get an understanding of how it works. Installation is relatively simple however the cover of the steering wheel must be removed to get access to the wires to connect. Once you have the necessary wires in place, it is essential to wrap them with electrical tape for protection and insulation. To program a key fob on a new vehicle, simply insert the ignition key that was originally used and turn it on the “ON” setting (not the “start” or “run”) While the key in the ignition is turned on, simultaneously press and hold both the unlock and the lock button of your new remote for 30 seconds. If you have done it correctly your car will sound a chime. The programming process will also be successful. After programming a new keyfob successfully, turn the ignition to “OFF” and test all buttons to ensure that they work. How do I change the battery in my keyless entry system? Replace the batteries on your keyfob at least every couple of years or if you notice that your keyfob is less responsive. This can be done in under 10 minutes. You don't need to reprogram the key fob every time you replace the battery. First, you'll need to make sure you have the appropriate type of battery in your inventory. The battery's type should be written on the key fob in case you flip it over. If it is illegible, you can make use of a small flat head screw driver to break open the key fob and inspect inside. Key fobs typically accept the CR-1620 battery, which is readily available in many stores, including Home Depot Walmart & AutoZone. It is easy to open the key fob by removing the mechanical key. Use a flathead screwdriver or your fingernail in order to do this. Replace the old battery with the one you bought. The positive (+) side of the new battery should be facing up. Reassemble the two sides and snap it close. Certain keys require programming which can be done using a special tool that an automotive locksmith or dealer has access to. Non-transponder keys do not require programming, which is why they are a good option for those who do not have the tools to program their car.