Mazda 2 Key Fob Replacement It can be quite frustrating when a device stops working However, this is a fairly common problem and is easy to fix Most of the time, it's just a changing the battery Batteries can be found at most big-box retailers and hardware stores You can also look in 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 system that you have in your car is a remote control system that allows you to lock and unlock your vehicle without needing to insert your keys The keyless entry system is typically located on a keyfob or integrated into the ignition key handle Some models offer the option to remotely lock the trunk and tailgate The system transmits a radio signal to a computer in your car The car reads the radio signal to determine if it is the right key If it's a valid key it will unlock the doors automatically and the engine can begin The key fob itself also has a security chip, also known as a transponder It prevents the car from starting if the incorrect key is used Keyless entry systems have their pros and drawbacks They are prone to being accidentally activated by children playing with them, or switched on when the owner isn't there in the car This can cause power windows and other functions of the vehicle to operate without the owner's knowledge or consent and can even set off the alarm Another issue is that there are a multitude of ways thieves can breach the security of keyless entry systems, and then hack your vehicle's computer to make it think your key fob is close enough to be able to start the car It is vital to have a working backup key or fob How do I change my keyless entry system It can be a major inconvenience if your key fob's battery fails while you're on the road It's simple to replace the battery on a Mazda 2 flip key transponder You'll just need to know how to open the key fob and which type of battery to buy You'll want to use a flathead screwdriver with tape wrap to pry open the case, starting with one side, and then the other, working with care to avoid breaking it After the case has been opened and the battery removed, you can take out the old battery and place the case somewhere where you'll never lose it Replace the battery, making sure to place it in a way that the positive side is facing upwards It's also a good idea to note the code number on the back of your manual key, so that you can program the replacement fob by using it It is important to note that although you can duplicate an old car key in hardware stores, the majority of the newer smart keys require programming from a locksmith or dealer The cost of replacing a fob, programming, and mechanical keys for backup can add up to the total Check your car's warranty, auto club membership, or insurance policy to determine whether they cover the expense You could save money by buying a replacement key fob on the internet, and then having it programmed by a locksmith How do I program my keyless entry system Generally, the same procedure can be used to program a key fob for most major car models The process for certain vehicles might be different and require special hardware or computer software In these cases you should refer to the manual or call an expert for more assistance Make sure you have all the tools and materials that you need prior to beginning It is recommended to study the instruction manual for the keyless entry system in order to gain a better understanding of the way it works Installation is relatively simple but the cover for the steering wheel needs to be removed to get access to the wires for the connection Once you have the necessary wires in place, it's crucial to wrap them in electrical tape to protect them and for insulation To program a key fob to a new car, insert the ignition key that was originally used and turn it on the "ON" setting not the "start" or "run" When the key in the ignition is switched on, simultaneously press and hold both the unlock and the lock button of the new remote for 30 seconds If done correctly, the car will sound a chime, and the process of programming will be successful After programming the new keyfob successfully switch the ignition to "OFF" and test each button to confirm that they function How do I change the battery in my keyless entry system Replace the batteries in your keyfob every couple of years or if you notice that it is less responsive This is a simple process that can be completed within a matter of 10 seconds Most times you don't need to modify your key fob's settings after replacing the battery It is essential to have the correct battery in your inventory https//wwwthekeylabcouk/mazda-car-keys/ should be clearly written on the key fob if you flip it over If it is illegible then you can make use of a small flat head screw driver to open the key fob and look inside Most key fobs accept batteries CR-1620 that are available at many stores, including Home Depot, Walmart, amp; AutoZone After you've removed the mechanical key from the key fob, you can open it using the help of a flathead screw driver or your fingernail Replace the old battery with the one you bought Make sure the new battery has its positive + side facing up and then reassemble both 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 available to locksmiths in the automotive industry or dealers Non-transponder keys don't require programming, which is why they are a great option for those who do not have the tools to program their car