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Mazda 2 Key Fob Replacement While it is frustrating to find a fob that stops working, it is fairly common and easily fixed. It is usually a matter of replacing the batteries. Batteries can be found in many big-box retailers as well as hardware stores. You can also consult your owner's manual as well as on YouTube for directions on how to open the fob and replace the battery. What is a keyless access system? replacement mazda key inside your car is a remote control system that allows you to lock and unlock your car without physically inserting the keys. The keyless entry system is typically mounted on a keyfob integrated into the ignition key handle. Certain models allow you to remotely secure the tailgate and trunk. The system works by transmitting a radio signal from your key fob to your car's computer. The car analyzes the radio signal to determine if the key is the correct key. If it is then the doors will unlock and the engine will be started. The key fob also contains the transponder or security chip that blocks the vehicle from starting if the wrong key is used. While keyless entry systems are convenient, they do have some disadvantages. Children may accidentally activate them by playing with them, or they may be turned on even if the owner is not in the vehicle. This can cause the power windows and other features to operate without the owner's knowledge or permission, and it may even cause the car alarm to go off. Another concern is that there are a number of ways thieves can breach the security of keyless entry systems and hack into your vehicle's computer to make it believe that your fob is near enough to enable the car to start. Therefore, it is important to ensure that you have a backup key or fob. How do I change my keyless entry system? If the battery in your car's key fob dies while you're on the go, that can be a major inconvenience. Luckily, changing a Mazda 2 transponder flip key's battery is pretty simple. You will need to know the best method to open the key fob, and which type of battery should buy. Use a screwdriver with tape wrap to gently open the case and work from one side to the other. Be careful not to damage it. After the case is opened, remove the old battery. Place the case somewhere that you will not forget about it. Replace the battery by orienting it to ensure that its positive face is facing upwards. It's recommended to note down the code number on the back of your manual key so that you can program the replacement fob by using it. While you can duplicate a key made of metal at a hardware store most of the modern smart keys require programming by a locksmith or dealer. The cost of a replacement fob, programming, and mechanical backup keys can be added to the total. If you have an auto club membership or insurance policy, you should check to see if it will cover the cost. You might be able to save money by purchasing an aftermarket key fob online, and then having it programmed by a locksmith. How do I set up a keyless entry system to my home? Generally, the same procedure can be used to program a key fob for the majority of car models. However, the process for certain cars may be a bit different and might require special hardware or software. In these cases, it would be best to consult the manual or contact an authorized dealer for additional assistance. Before starting, make sure you have all the materials and tools. It is recommended to go through the instruction manual for the keyless system to gain a better understanding of how it functions. The installation is relatively easy however you'll need to take off the cover for the steering wheel in order to access the wires necessary for the connection. Wrapping the wires with electrical tape will protect and protect them from damage. To program a key fob for a new vehicle, insert the ignition key that was originally used 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 a minimum of 30 seconds. If you've done it right, your vehicle will chime. The programming process is also successful. After successfully programming a new key fob turn the ignition back to the “OFF” position and test all buttons to make sure they work correctly. How do I replace the battery in my keyless entry system? Every few years, or when the key fob seems to become less responsive, you'll need to replace the batteries in your key fob. This can be done in less than 10 seconds. You don't need to reprogramme the key fob every time you replace the battery. First, you'll want to make sure you have the appropriate type of battery available. The type of battery you're looking for should be noted on the key fob if you flip it over. If it's not, you can use a small flat head screw driver to unlock the key fob and look inside. Typically, key fobs use batteries of CR-1620, which are readily found at a variety of retailers, including Home Depot, Walmart, & AutoZone. You can easily access the key fob after removing the mechanical key. Use a flathead screwdriver or your fingernail to do this. Then, take out the old battery and replace it with the one you purchased previously. The positive (+) side of the new battery must be facing up. Reassemble the two sides and then snap it close. Certain key fobs require programming that can only be done with a specific tool that an automotive locksmith or dealer has access to. Keys that do not have transponders do not require programming, so they are a great option for those without the tools to program their vehicle.