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Mazda 2 Key Fob Replacement While it is frustrating when a device stops functioning, it's quite frequent and easily repaired. Most of the time, it's just a changing the battery. Batteries can be found at the majority of big-box retailers and 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 entry system? The keyless entry in your car is a remote control system that lets you lock and unlock the vehicle without needing to insert your keys. It's typically on a key fob or built into your ignition key handle. Some models even provide the option of remotely locking the trunk and tailgate. The system transmits an audio signal to the computer in your car. The car analyzes the radio signal to determine if the key is the correct key. If it's the right key the doors will open automatically and the engine can start. The key fob is also equipped with a transponder or integrated security chip that blocks the vehicle from starting if a faulty key is used. Keyless entry systems have their advantages and drawbacks. Children may accidentally activate them through playing with them, or they can be turned on even if the owner is not in the vehicle. This could cause the power windows and other features to work without the owner's knowledge or permission and may trigger the car alarm. There are also a number ways that thieves can hack into the computer in your car to trick it into thinking your key fob was close enough to be able to start your vehicle. It is therefore crucial to ensure that you always have a spare working 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 road, it could be a major hassle. Fortunately, replacing a Mazda 2 transponder flip key's battery is pretty simple. You will be required to know the proper way to open the key fob, and what type of battery you need to purchase. Use a tape-wrapped screwdriver to gently pry open the case, working from one side to the other. Be careful not to damage it. After the case is opened, remove the old battery. Place the case in a place so that it is not forgotten. Replace the new battery, making sure to position it so that the positive side is facing upwards. It's recommended to note the code number on the back of your manual key in order to program the replacement fob with it. While you can duplicate an old metal key at a hardware store, many of the latest smart keys require programming by an expert locksmith or dealer. The cost of a replacement fob, programming, and a mechanical backup key could add up to the total. Examine your car's warranty, auto club membership, or insurance policy to determine whether they cover the expense. You could be able to save money by buying a replacement key fob online, and having it programmed by a locksmith. How do I program my keyless entry system? In general the same procedure is used to program key fobs for all major auto brands. However, the procedure for certain vehicles might differ and might require special hardware or software. In these cases it is recommended to read the manual, or contact an authorized dealer further assistance. Before starting, make sure you have all the materials and tools. It is recommended to review the instruction manual of the keyless entry system in order to gain an understanding of how it functions. The installation process is fairly straightforward however you'll need to remove the cover of your steering wheel in order to access the wires that are required for connection. Once you have the required wires connected, it is essential to wrap them in electrical tape to ensure protection and insulation. To program a key fob on a new car, insert the ignition key from the previous vehicle and turn it to the “ON” setting (not the “start” or “run”) When the key in your ignition is switched on, simultaneously press and keep holding both the unlock and the lock button of the new remote for 30 minutes. If done correctly, the car will sound a bell and the process of programming will be successful. After successfully programming the new key fob, switch the ignition back to the “OFF” position and test all buttons to ensure they work properly. How do I replace the battery in my keyless entry system? Replace the batteries in your keyfob every couple of years or when you notice it's less responsive. This is an easy task that can be accomplished in less than 10 minutes. It is not necessary to reprogram the key fob each time you change the battery. In the beginning, you'll want make sure you have appropriate type of battery available. If you flip the key fob it should show the name of the battery on it. If it's not then you can use a small flat head screw driver to break open the key fob and look inside. Key fobs generally accept batteries of CR-1620, which are readily found at a variety of retailers including Home Depot, Walmart, & AutoZone. Once G28 Car Keys Solutions have removed the mechanical key from the key fob you can easily open it by making use of a flathead screw driver or your fingernail. Then, take out the old battery, and replace it with the new one you purchased previously. The positive (+) side of the new battery must be facing upwards. Reassemble the two sides and then snap it to close. Some key fobs need programming. This can be done using a special tool that is available to dealers or automotive locksmiths. Keys that do not have transponders do not require programming, which is why they are a good option for those who do not have the equipment to program their vehicle.