How to Fix Common Mazda 3 Key Problems The Mazda 3 is an elegant compact car that features a luxurious interior and a responsive handling It's also a huge deal cheaper than many other compacts available It's a real hassle to lose keys It is costly to replace spare keys, and also towing your car to a dealer to reprogram your key Key not locking or unlocking the doors If doors are not locked, it can be very dangerous, especially if the vehicle is moving If the door is opened while the vehicle is moving, it could cause passengers to fall or suffer injuries To avoid this be sure to keep the keys away from children Children might find them intriguing and play around with them This could cause the power window or other controls to malfunction and even move the vehicle If you notice the key fob doesn't unlock or lock the doors, the battery may be dead The button-cell battery inside the keyfob has a limited life span, so you should replace it regularly A good battery will last between two and four years When replacing the battery, it is crucial to choose a replacement battery with the same voltage and size as the original Another reason for why the key fob might not be working is a key pairing problem It's possible that the keyfob was not properly linked to the vehicle when it was purchased In this case the dealer has to reprogramme it Fortunately, this can be done within a matter of minutes The dealership can also reset any residual electrical power in the on-board computer This won't fix the problem with your key fob's ability to lock or unlock doors Dead coin battery It's possible that your battery is not functioning properly if your key fob does not turn on or unlock your vehicle This is a common problem however it can be easily fixed You can replace your battery on your own and avoid the hassle of going to a dealer The process is easy and requires only the use of a few basic tools Press the auxiliary key button on the back of the Mazda flip key This will let you take off the auxiliary keys made of metal There is an opening on each side of the case once the auxiliary metal is removed Use a tape-wrapped flathead screwdriver to pry open the case, beginning with one side, and then the opposite Gently pull the two halves of the case apart and place them aside Now you'll be able to see the inside of the battery on the key fob, so you can replace it Be careful not to scratch the small rubber ring that the battery sits on After the battery has been replaced, you can reassemble the case and take pleasure in your new key fob You can purchase an alternative battery in most stores that sell batteries Find a CR2025 coin cell battery These batteries are commonly used in calculators and watches, however, they can be purchased from auto parts stores or on the internet It is simple and quick to change the battery in your Mazda 3 This will save you money and avoid having to visit a dealership Key pairing issue If your Mazda 3 has been working for a few days and then suddenly stops it could be because of the remote keyless receiver module This could happen in the event that the internal chip on the key fob has been damaged This could be due to several factors, such as a dropped key or exposure to water Fortunately, the key fob's electronic chips are protected by rubber seals and will be fine with a splash of water Submerging the key fob into pool or ocean water could be a major problem because the salty water is extremely conductive and may cause damage to the electronic components If your key fob will not function, you might require an upgrade to the battery A quick search of the internet will reveal that there are many third-party replacement batteries However, it's crucial to keep in mind that they might not work with your Mazda 3 It is best to purchase it from a dealer to ensure that it is compatible with your Mazda 3 After replacing the battery the key fob will be working again If the remote isn't responding when press the lock button, it is likely in power-saving mode To remove it from this mode you'll have to press the button five times and then hold it down until the red light flashes Reprogramming the key The keyless entry system that comes with the Mazda allows you to open and start the car without the traditional key This is a great convenience however, the process of reprogramming the remote or the key could be difficult for some It also requires a device which is only accessible to the locksmith for your car or dealer The machine is connected to the vehicle's computer and starts the process of programming for the new key or remote The first step is to have at least two working keys for the Mazda The next step is the reprogramming of a spare key The functions of the new FOB will be temporarily turned off to protect the vehicle from theft Once you've reprogrammed your new key, these functions will be activated again You can now use the new key for the ignition and to open the doors Make sure it is working Keep a spare set keys if you're worried about losing your keys Adding https//wwwthekeylabcouk/mazda-car-keys/ to your Mazda is a simple process Just follow these steps and save a lot of money, as you don't have to pay a dealership to complete the task for you This can also save you from the expense of a tow and save money on a new spare key