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How to Fix Common Mazda 3 Key Problems

The Mazda 3 is a stylish compact car that is agile in its handling and luxurious interiors. It's also a great value compared to other compact cars available.

It can be a huge trouble to lose keys. Not only does it mean you'll need to pay for the dealership to tow your vehicle and reprogramme your key and it could cost you money to replace the spare keys.

Keys not locking or unlocking the doors

Leaving the doors unlocked could be very dangerous, particularly if the vehicle is moving. If the door is opened when the vehicle is moving, it could cause passengers to fall out or suffer injuries. Keep the keys out of reach of children to avoid this issue. Children might find them appealing and may want to play with them, which could cause the power windows or other controls to function and even cause the vehicle to move.

If you notice that your key fob is not locking or unlocking doors, it probably means that the battery is dead. The button cell battery in the key fob has a restricted time span, so it's essential to replace it frequently. A good battery is expected to last between two and three years. It is crucial to replace the battery with a battery that is the same voltage and the same dimensions as the original.

Another reason for why the key fob may not be working is a key pairing problem. It is possible that the key fob was not paired properly with the car when it was first purchased. In this instance, the dealer will need to reprogramme it. This can be accomplished in less than one minute. The dealership can also reset any residual electricity in the on-board computer. However, this does not make the key fob more able to lock or unlock doors.

Dead coin battery

If your key fob won't be working or unlocking your car, it may be because the battery is dead. This is a typical issue however, it is easily solved. You can replace the battery on your own, avoiding going to the dealer. The process is easy and requires just two tools.

Press the auxiliary button on the back of the Mazda flip key. This will open the metal auxiliary key and allow you to take it off. Once the metal auxiliary key is removed, you'll notice there is a slot on both sides of the fob case. Make use of a tape-wrapped flathead screwdriver to pry open the case, starting with one side and then the opposite. Gently tear apart the two halves, then set them aside.

Now you'll have a clear picture of the key fob's battery and you can replace it. Be careful not to damage the small rubber ring that the battery sits on. After the battery is replaced, you can put it back in your case and use the new key fob.





Most stores that sell batteries have a replacement battery. Find a CR2025 battery. These batteries are typically used in calculators and watches, but can also be found in auto parts stores and online. Changing the battery in your Mazda 3 is easy and quick, and will save you money when you travel to the dealership.

Key pairing issue

If you've been driving your Mazda 3 for a long time, but it suddenly stopped working, it may be a problem in the remote keyless system receiver module. This could happen if the internal chip of the key fob is damaged. This can be caused by various factors like dropping or wet keys.

The electronic components of the key fob are protected by rubber seals, therefore a raindrop shouldn't cause any damage. The key fob's submersion in the ocean or in pool water could be a major issue because salty water is highly conductive and can damage the electronic components.

If your key fob does not function, you might need an upgrade to the battery. A quick search on internet will reveal that there are countless third-party replacement batteries. It is important to keep in mind that these batteries may not be compatible with your Mazda 3. It's best to buy from a dealer to make sure that it works with your Mazda 3.

After replacing the battery, you should be able use your key fob in the future. If the remote does not respond when you press the lock button, it's likely that the key is stuck in power saving mode. Press the lock button 5 times, and hold it until the red light turns on.

Reprogramming the key

Mazda's keyless entry feature allows you to unlock the car and start it without the requirement of a traditional key. This is a fantastic convenience however the process of programming the remote or key might be difficult for some. It also requires a device that is available only to the automotive locksmith or dealer. This machine is connected with the computer in the vehicle, and it starts the programming process for a new key or remote.

The first step is to ensure that you have at least two keys that function for the Mazda. The next step is changing the programming of a spare key. Initially, the functions of the new FOB are turned off to protect the car from theft. Once you've resettled the new key, you can activate these functions once more.

After that, you can use the new key to unlock the doors and start the engine. It is important to test it first to make sure it works. If mazda 6 key fob replacement worried about losing the keys, it is recommended to keep a spare one in your possession.

The process of adding a spare key to your Mazda is a straightforward procedure. Follow these steps and you can save a considerable amount of money, as you don't have to pay a dealership do it for you. This will save you money on a tow bill and a spare key.