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Mazda 2 Key Fob Replacement It can be very frustrating when a fob ceases to function. However it is a common problem and can be resolved easily. In most cases, it's a a matter of replacing the battery. Batteries for replacement are available at a variety of hardware stores and big-box retailers. There are also 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 system that is in your car is a remote control system that allows you to lock and unlock your vehicle without the need to physically insert the keys. It is usually contained on a key fob, or built into the ignition key handle. G28CarKeys offer the option of remotely locking the trunk and tailgate. The system transmits radio signals to the computer in your car. The car is then able to determine whether it is the correct key. If it's the right key then the doors will be opened automatically and the engine can begin. The key fob in itself includes a security chip, also known as a transponder, that stops the car from starting if a wrong key is used. While keyless entry systems are convenient, they have a few drawbacks. Children can accidentally activate them by playing with them, or they could be turned on while the owner is not in the vehicle. This can cause power windows and other features of the vehicle to operate without the owner’s consent or knowledge and could even cause the alarm to go off. There are numerous ways that thieves can hack into the computer of your vehicle to fool it into thinking your fob's key was close enough to enable your car to start. Therefore, it is important to ensure that you always have a spare working key or fob. How do I replace my keyless entry system? It can be a major problem if your key fob battery fails while you're on the road. It's simple to replace the battery on the Mazda 2 flip key transponder. It's just a matter of knowing how to open the key fob as well as which kind 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 damage it. After the case has been opened, you can remove the old battery and place the case in a place where you will not lose it. Replace the battery, placing it so that its positive side is facing up. It's recommended to write down the code number on the back of your manual key so that you can program the replacement fob by using it. Be aware that although you can copy an old car key at hardware stores modern smart keys require programming by an authorized locksmith or dealer. The cost of a replacement fob, programming or mechanical backup keys can increase the total. Make sure to check your warranty, auto club membership, or insurance policy to determine if they will cover the cost. You might be able save some money by getting an aftermarket fob on the internet and having it programmed by a locksmith rather than the dealership. How do I set up a keyless entry system for my home? In general the same steps are used to program key fobs for all major automobile brands. The process for some cars may be different and may require specialized hardware or computer software. In these cases you should consult the manual or talk to an authorized dealer for assistance. Before starting, make sure to have all the necessary materials and tools. It is recommended to also go through the instruction manual for the keyless entry system in order to get a better understanding of how it works. The installation is relatively easy however you'll need to remove the steering wheel cover to gain access to the wires required for the connection. Once you have all the wires connected, it is important to wrap them with electrical tape to protect them and for insulation. To program an entirely new key fob insert the original key into the ignition and then turn it to the “ON” position (not the start or run position). While the key in the ignition is turned on, simultaneously press and hold both the unlock and lock button on your new remote for 30 minutes. If you have done it correctly, your vehicle will chime. The programming process is also successful. After programming a new keyfob successfully, switch the ignition to “OFF” and test all buttons to confirm that they function. How do I change the battery in my keyless entry system? Replace the batteries in your keyfob each few years or when you notice that it is less responsive. This task can be completed in under 10 minutes. You don't need to reprogramme the key fob every time you replace the battery. First, you'll want to make sure you have proper type of battery in your inventory. The type of battery you're looking for should be noted on the key fob in case you flip it over. If the type of battery isn't legible it is possible to open the key fob with an screwdriver with a flat head and examine inside. Most key fobs accept the CR-1620 battery, which is readily available at many stores that include Home Depot, Walmart, & AutoZone. It is easy to open the key fob by taking out the mechanical key. Make use of a flathead screwdriver or your fingernail for this. Then, remove the old battery, and replace it with the new one you bought previously. The positive (+) side of the new battery should be facing upwards. Reassemble the two sides and snap it to shut. Certain key fobs require programming that can only be accomplished using a specific tool that an automotive locksmith or dealer has access to. However, non-transponder keys do not require being programmed, which makes them a great option for people who don't have tools needed to program their vehicle.