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Mazda 2 Key Fob Replacement It can be very frustrating when a device stops working. However this is a common issue and is easy to fix. It is usually a simple issue of replacing the batteries. Batteries can be found in the majority of big-box stores and hardware stores. 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 that is in your vehicle is a remote control system that enables you to lock and unlock your vehicle without the need to physically insert the 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 transmits a radio signal to a computer in your car. The car is then able to determine if it's the correct key. If it is then the doors will unlock and the engine will be started. The key fob itself contains an integrated security chip, or transponder. It prevents the car from starting if a incorrect key is used. Keyless entry systems have their advantages and disadvantages. Children can 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 power windows and other functions of the vehicle to operate without the owner's knowledge or consent and could even trigger the alarm. Another concern is that there are a variety of ways thieves can breach the security of keyless entry systems, and then hack the computer of your vehicle to make it believe that your key fob is close enough to enable the car to start. It is vital to have a working backup key or fob. How do I change my keyless entry system? If your car's key fob battery dies while you're on the go, that can be a major hassle. Fortunately, changing the Mazda 2 transponder flip key's battery is fairly easy. You will need to know the correct method of opening the key fob, and which type of battery should purchase. Use a screwdriver with tape wrap to gently pry the case open by working from one side to the other. Be careful not to break it. After the case has been opened, you can remove the old battery and put the case in a place where you will not lose it. Replace the battery, orienting it so that the positive side is facing upwards. It's recommended to write down the code number on the back of your manual key, in order to program the replacement fob by using it. While you can duplicate an old metal key at a hardware shop, many of the newer smart keys require programming by an expert locksmith or dealer. The cost of replacing a fob, programming or a mechanical back-up key can add 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 could be able save some money by getting an aftermarket fob online and having it programmed by a locksmith, rather than a dealership. How do I program an entry system that is keyless for my home? In general, the same steps can be used to program a key fob on most major car models. However, the process for some vehicles may be a little different and might require special hardware or software. In these instances, you should consult the manual or talk to an expert for more assistance. Before you begin, ensure that you have all the required materials and tools. It is recommended to also review the instruction manual of the keyless entry system in order to gain more understanding of how it works. Installation is relatively simple but you'll have to take off the cover for the steering wheel in order to access the wires necessary for the connection. Once you have the required wires connected, it is crucial to wrap them in electrical tape to protect them and provide insulation. To program visit my home page to a new vehicle, simply insert the original ignition key and turn it on to the “ON” setting (not the “start” or “run”) When the key in the ignition is switched on, simultaneously press and keep holding both the unlock and lock button on your new remote for 30 seconds. If you've successfully completed the process your car will sound a chime. The programming process is also successful. After programming a new keyfob successfully turn the ignition to “OFF” and test all buttons to confirm that they function. How do I replace the battery in my keyless entry system? Every few years or when the key fob is becoming less responsive, you'll have to replace the batteries in your key fob. This task can be accomplished within less than 10 seconds. Most times, you don't even need to reset your key fob after replacing the battery. In the beginning, you'll want make sure you have right kind of battery in stock. If you flip the key fob over it, you should see the type of battery written on it. If the battery's type is not visible then you can open the key fob with a flat-head screwdriver and check inside. Generally, key fobs accept batteries CR-1620 that are found at a variety of retailers including Home Depot, Walmart, & AutoZone. It is easy to unlock the key fob by taking out the mechanical key. Make use of a flathead screwdriver or your fingernail to do this. Then, remove the battery that was in use, and replace it with the one you purchased previously. The positive (+) side of the new battery must be facing upwards. Reassemble the two sides and snap it shut. Some key fobs need programming. This can only be done with a special tool, which is only available to locksmiths in the automotive industry or dealers. But, non-transponder steel keys do not require being programmed, making them a great choice for those who don't have the tools to program their car.