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Mazda 2 Key Fob Replacement It can be frustrating when a device stops functioning. However this is a common issue and can be fixed easily. It is usually a simple matter of replacing the batteries. Batteries can be found for replacement at most hardware stores and big-box retailers. You can also find the instructions in your owner's manual or on YouTube on how to replace the battery by opening the fob. What is a keyless system? The keyless entry feature in your car is a remote-control system that allows you lock and unlock the vehicle without having to insert your keys. The keyless entry system is typically installed on a keyfob, or integrated into the ignition key handle. Some models offer the option to remotely secure the tailgate and trunk. The system works by sending an audio signal from the key fob to your car's computer. The car is then able to determine whether it is the correct key. If it is it is, the doors will unlock and the engine can be started. The key fob can also contain an embedded security chip that stops the vehicle from starting if a wrong key is used. Keyless entry systems have advantages and drawbacks. They can be accidentally activated by children playing with them, or turned on when the owner isn't in the vehicle. This could cause the power windows and other features to function without the owner's knowledge or permission or permission, and it could cause the car alarm to go off. Another issue 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 your key fob is close enough to allow you to start your car. It is vital to have a working fob or backup key. How do I replace my keyless access device? If the battery in your car's key fob fails while you're move, it can be a major hassle. It's easy to change the battery on the Mazda 2 flip key transponder. You'll just need to know how to open the key fob and what type of battery to purchase. Use a screwdriver with tape wrap to gently open the case by working from one side to the other. Be careful not to break it. After the case is opened, remove the old battery. Place the case somewhere that you will not forget about it. Replace the battery, turning it to ensure that its positive face is facing upwards. It's also a good idea to note the code number on the back of your manual key, to allow you to program the replacement fob by using it. Be aware that although you can copy the old metal car keys at hardware stores, many of the most recent smart keys require programming from a locksmith or dealer. The cost of a replacement fob, a programming key and a mechanical back-up key can be added to 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 to save money by purchasing a second-hand key fob online, and having it programmed by a locksmith. How do I program my keyless entry system? In general the same process is used to program key fobs for most major automobile brands. The process for certain vehicles may differ slightly and may require specialized hardware or computer software. In such cases it is recommended to consult the manual or consult an authorized dealer for further assistance. Before starting, make sure to have all the necessary materials and tools. It is recommended that you study the instruction manual for the keyless entry system to gain a better understanding of how it functions. Installation is fairly easy however the steering wheel cover must be removed to get access to the wires that will be used to connect. Once you have the required wires connected, it's essential to wrap them with electrical tape to protect them and for insulation. To program the new key fob, insert the original key into the ignition and then turn it to the “ON” position (not the start or run position). When the key in your ignition is on, simultaneously press and keep holding both the unlock and lock button on your new remote for 30 minutes. If done correctly, the vehicle will sound a bell and the process of programming will be successful. After successfully programming a new key fob return the ignition to the “OFF” position and test all of the buttons to ensure they work correctly. How do I replace the battery in my keyless entry system? Replace the batteries in your keyfob each few years or whenever you notice that it is less responsive. This is an easy task that can be completed in about 10 seconds. You don't have to reprogram the key fob each time you replace the battery. In the beginning, you'll want ensure you have the appropriate type of battery in your inventory. The type of battery should be clearly written on the key fob in case you flip it over. If mazda 3 spare key of battery is not clear you can remove the key fob using an flat-head screwdriver and look inside. Key fobs usually accept the CR-1620 battery, which is readily available in many stores including Home Depot Walmart & AutoZone. After you've removed the mechanical key from the key fob, you can easily open it by making use of a flathead screw driver or your fingernail. Remove the old battery, and replace it with the new one that you previously purchased. The positive (+) side of the new battery must be facing up. Reassemble the two sides and then snap it to shut. Some key fobs need programming. This can be done using a specific tool that is only accessible to automotive locksmiths or dealers. Non-transponder keys don't require programming, which is why they can be a viable option for those who don't have the tools to program their vehicle.