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Mazda 2 Key Fob Replacement It can be frustrating when a device stops functioning. However it is a common issue and is easily fixed. It is usually a matter of replacing the batteries. Batteries can be found for replacement in a wide range of hardware stores as well as big-box retailers. You can also find instructions in your owner's manual or on YouTube on how to replace the battery by opening the fob. What is G28 Car Keys -entry system? The keyless entry system you have in your car is a remote control system that lets you to lock and unlock your vehicle without physically inserting keys. It's usually on a key fob or built into your ignition key handle. Some models even offer the option of remotely locking the trunk and tailgate. The system works by transmitting a radio signal from the key fob to your car's computer. 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 instantly and the engine can start. The key fob itself also contains an integrated security chip, or transponder. It prevents the vehicle from starting if the incorrect key is used. Keyless entry systems come with advantages and drawbacks. Children may accidentally activate them when playing with them, or they may be turned on when the owner isn't in the vehicle. This could cause power windows and other features of the vehicle to function without the owner’s consent or knowledge or consent, and may cause the alarm to go off. There are also a number ways for thieves to hack into the computer system of your vehicle to fool it into thinking that your key fob was close enough to be able to start your vehicle. It is therefore important to make sure that you have a backup fob or key. How do I replace my keyless entry system? It can be a major problem if your key fob battery goes out while you are on the road. It's simple to change the battery on a Mazda 2 flip key transponder. You'll need to know the correct way to open the key fob, and which type of battery should purchase. You'll need to use a tape-wrapped flathead screwdriver to pry open the case. Start with the one side and moving to the other side, using it gently to avoid damaging it. After the case has been opened it is possible to remove the battery from the case 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 upwards. You can also program the replacement fob by writing down the code from the back of the manual key. Also note that while you can duplicate an old car key made of metal in hardware stores, the majority modern smart keys require programming from a locksmith or dealer. The cost of replacing a fob, programming or a mechanical back-up key can add to the total. Check your car's warranty or auto club membership or insurance policy to determine whether they pay for the cost. You may be able save money by purchasing a second-hand key fob on the internet, and then having it programmed instead by locksmith. How do I program my keyless entry system? Generally speaking, the same steps can be used to program a key fob for all major car models. The process for some cars may be slightly different and require special hardware or computer software. In those cases, it would be best to refer to the manual or consult an authorized dealer for assistance. Before starting, make sure that you have all of the required materials and tools. It is recommended to study the instruction manual for the keyless entry system in order to get an understanding of how it operates. Installation is relatively simple however, you'll need to remove the cover of your steering wheel to access the wires required for the connection. Once you have the wires in place, it's essential to wrap them with electrical tape for protection and insulation. To program the new key fob, insert the original key into the ignition and turn it to the “ON” position (not the start or run position). While the key is in the ignition you must simultaneously press and hold both the lock and unlock buttons on the new remote for a minimum of 30 seconds. If done correctly, the car will sound a bell and the process of programming will be successful. After programming the new keyfob successfully switch the ignition to “OFF” and test all buttons to ensure that they work. How do I change the battery on my keyless entry system? Replace the batteries on your keyfob at least every couple of years or whenever you notice that it's less responsive. This task can be accomplished in under 10 minutes. It is not necessary to reprogram the key fob each time you replace the battery. You'll need to make sure you have the correct battery on hand. If you flip the key fob over it, you should see the battery's name written on it. If the battery's name is not legible you can remove the key fob using an screwdriver with a flat head and examine inside. Key fobs usually accept the CR-1620 battery, which is readily available at many stores like Home Depot Walmart & AutoZone. It is easy to open the key fob by you have removed the mechanical key. Use a flathead screwdriver or your fingernail in order to do this. Replace the old battery with the one you bought. Make sure the new battery has its positive (+) side facing upwards Then, reassemble the two sides of the key fob, and snap it to close. Certain keys require programming. This can only be done using a specific tool that is only available to automotive locksmiths or dealers. However, non-transponder key fobs do not need to be programmed, making them a great option for those who don't have the tools to program their car.