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Mazda 2 Key Fob Replacement It can be a bit frustrating when a device stops functioning. However it is a common problem and is easily fixed. Usually, it is just a matter of replacing the battery. Batteries can be found at many big-box retailers as well as hardware stores. You can also find instructions in your owner's guide or on YouTube on how to replace the battery by opening the fob. What is a keyless access system? The keyless entry system in your car is a remote-control system that allows you to lock and unlock the vehicle without having to insert your keys. It's typically on a key fob, or built into the ignition key handle. Some models offer the option to remotely secure the tailgate and trunk. The system operates by transmitting a radio signal from the key fob to the car's computer. The car reads the radio signal to determine if it's the correct key. If it is, the doors will automatically unlock and the engine will be started. The key fob also has a transponder or integrated security chip that stops the vehicle from starting if a wrong key is used. mazda 5 key fob have their pros and disadvantages. They may be activated accidentally by children playing with them, or turned on when the owner isn't in the vehicle. This can cause power windows and other features of the car to function without the owner’s knowledge or consent or consent, and may trigger the alarm. Another issue is that there are a myriad of ways thieves can breach the security of keyless entry systems, and then hack your vehicle's computer to make it believe that your key fob is near enough to allow you to start your car. It is therefore important to ensure that you always have a backup working fob or key. What can I do to replace my keyless access device? If the battery in your car's key fob fails while you're go, that can be a major inconvenience. It's simple to change the battery on a Mazda 2 flip key transponder. You'll only need to know how to open the key fob, and then which type of battery to buy. Use a screwdriver with tape wrap to gently pry the case open by working from one side to the other. Be careful not to damage it. Once the case has been opened, remove the old battery. Place the case in a place that you won't forget it. Replace the battery, turning it to ensure that its positive side is facing up. It's recommended to write down the code number on the back of your manual key to allow you to programme the replacement fob using it. Be aware that although you can duplicate the old metal car keys at hardware stores of the latest smart keys require programming by an authorized locksmith or dealer. The cost of a replacement fob, a programming key and a mechanical back-up key can add to the total. Examine your car's warranty or auto club membership or insurance policy to see whether they will cover the expense. You could save money by purchasing a key fob from an aftermarket store online, and having it programmed by locksmith. How do I program my keyless entry system? In general, the same procedure can be used to program a key fob for all major car models. The process for certain vehicles may differ slightly and may require specialized hardware or computer software. In these instances it is best to consult the manual or contact an authorized dealer additional assistance. Before starting, make sure you have all the materials and tools. It is recommended that you read the manual for the keyless system to better understand how it functions. Installation is pretty straightforward however, the cover for the steering wheel needs to be removed in order to reach the wires needed for the connection. Wrapping the wires with electrical tape will protect them and keep them in place. To program your new key fob insert the original key into the ignition and turn it to the “ON” position (not the run or start position). When the key in your ignition is turned on simultaneously press and keep holding both the unlock and the lock button on your new remote for 30 minutes. If done correctly, the vehicle will sound an alarm and the programming process will be successful. After successfully programming the new key fob, switch the ignition back to the “OFF” position and test all of the buttons to ensure they work properly. 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 need to replace the batteries in your key fob. This is an easy task that can be done within a matter of 10 seconds. You don't need to reprogram the key fob each time you change the battery. You'll need to ensure you have the correct battery on hand. The type of battery you're looking for should be clearly written on the key fob if you flip it over. If the battery's type is not visible it is possible to open the key fob with an flat-head screwdriver and look inside. Key fobs usually use the CR-1620 battery, which is widely available in a variety of stores like Home Depot Walmart & AutoZone. Once you have removed the mechanical key from the key fob, you can easily unlock it with the help of a screwdriver with a flathead or your fingernail. Then, remove the old battery, replacing it with the one you purchased previously. Make sure the new battery has its positive (+) side facing upwards and then reassemble the two sides of the key fob and snap them to seal it. Certain keys require programming and can only be accomplished with a special tool that an automotive locksmith or dealer has access to. But, non-transponder steel keys do not require being programmed, making them a great option for those who don't have tools needed to program their vehicle.