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 when compared to other compact cars on the market.

Lost keys can be a major problem. Not only does it mean you have to pay the dealer to tow your car and reprogramme your keys, but it can also cost money to replace spare keys.

Keys not locking or unlocking the doors

It's risky leaving doors unlocked, especially when the vehicle is in motion. If the door is opened when the vehicle is moving it can cause passengers to fall or get injured. To avoid this it is recommended to keep your keys away from children. Children might find them appealing and may want to play with them, which could cause the power windows or other controls to be activated and even make the vehicle move.

If you notice that your key fob is not locking or unlocking doors, it's likely that the battery is dead. The button-cell battery inside the keyfob is limited in its life span, therefore it's important to replace it regularly. A good battery should last between two and three years. When replacing the battery, it is essential to choose a replacement battery with the same voltage and size as the one that was originally.

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 paired with the vehicle when it was purchased. In this situation the dealer needs to reprogram it. Fortunately, this can be done in less than a minute. The dealership can also reset the onboard computer to remove any remaining electrical charge. However, this will not fix the key fob's ability to lock or unlock the doors.

Dead coin battery

It's possible that your battery is not functioning properly if your key fob isn't turning on or unlock your car. It's a common problem, but one that can easily be repaired. You can replace your battery yourself and avoid the hassle of going to a dealer. The process is simple and requires only the use of a few tools.

Press the auxiliary key button located on the back of the Mazda flip key. This will allow you to remove the metal auxiliary keys. After the auxiliary key made of metal is removed, you'll see the slot on either side of the fob case. Start with one side of the case and move around using a tape-wrapped screwdriver. Gently pull apart the two halves before putting them aside.

Now you'll be able to see the inside of the key fob battery which means you can replace it. You don't want to damage the rubber ring on which the battery is positioned. Once the battery is replaced, you can put it back into the case and take pleasure in your new key fob!

You can purchase an alternative battery in most stores that sell batteries. Look for replacement mazda key . These batteries are commonly used in watches and calculators, but they can also purchased from auto parts stores or online. It's simple and fast to change the battery in your Mazda 3. This will save you money and avoid having to visit a dealership.

Key Pairing Problem

If your Mazda 3 has been working for a while but suddenly stops and then it's possible that it's the remote keyless receiver module. It is more likely to occur when the chip inside the key fob is damaged. This can be caused by several factors, such as dropping or wetting the key.

The electronic components of the key fob are protected by rubber seals so a splash of rain is unlikely to cause harm. Submerging the key fob into pool or ocean water can pose a serious problem because the salty water is highly conductive and could cause damage to electronic components.

If your key fob isn't working, you're probably in need of a new battery. A quick search on the internet will reveal that there are numerous third-party replacement batteries. It's essential to be aware that they may not be compatible with your Mazda 3. It's best to buy from a dealer to make sure that it will work with your Mazda 3.

After replacing the battery, you'll be able to utilize your key fob in the future. However, if your remote doesn't respond when you press the lock button, it is probably stuck in power-saving mode. Press the lock button 5 times and hold it for a while until the red light appears.

Reprogramming the key

Mazda's keyless entry system enables you to unlock the car and begin it without the requirement for a regular key. It's a wonderful convenience, but the process to reprogramme the remote or key can be confusing for some people. This requires a machine that is available only to the auto locksmith or dealer. The machine is connected the computer in the vehicle and begins the programming process for the new key or remote.

The first step is to ensure that you have at least two keys that function for the Mazda. You can then proceed to changing the programming of a spare key. The functions of the new FOB will be temporarily removed to protect the vehicle from theft. Once you've reprogrammed your new key, these functions will be activated once more.

You can now use the new key to turn on the ignition and also to open the doors. It is important to test it first to verify that it functions. If you're worried about losing your keys, it's best to keep a spare key in the back of your hand.


Making a spare key for your Mazda is a relatively simple procedure. Follow these steps and you'll save a significant amount of money, as you don't have to pay a dealership complete the task for you. This will also help you avoid the cost of towing, as well as saving money on a spare key.