How to Fix Common Mazda 3 Key Problems
The Mazda 3 is an elegant compact car with a classy interior and agile handling. It's also an excellent value compared to other small cars available.
It can be a real problem to lose keys. It can be expensive to replace spare keys and taking your vehicle to the dealer for reprogramming your key.
The key does not lock or unlock the door

It's risky to leave doors unlocked particularly when the vehicle is moving. If the door is opened when the vehicle is moving it can cause passengers to fall or get injured. To avoid this problem it is recommended to keep the keys away from children. Children might find them fascinating and may play with them, which can cause the power windows or other controls to be activated and even make the vehicle move.
If you notice the key fob isn't able to lock or unlock the doors, the battery could be dead. The button cell battery in the key fob is limited in its time of life, which is why it is vital to replace it regularly. A good battery should last between two and three years. It is essential to replace the battery by a replacement that has the same voltage and the same dimensions as the first.
A problem with key pairing could also be the cause of your key fob not working. It could be that the key fob was not connected properly with the vehicle when it was first purchased. In this instance the key fob will need to be reset by the dealer. Fortunately, this can be done in less than a minute. The dealership can also reset the on-board computer to remove any remaining electrical charge. But, this will not make the key fob more able to lock or unlock the doors.
Dead coin battery
It's possible that your battery is dead if your key fob doesn't turn on or unlock your vehicle. This is a common issue but one that can easily be repaired. You can replace the battery yourself, avoiding going to the dealer. The procedure is easy and requires only some tools.
Then you need to press the auxiliary button on the back of your Mazda flip key. This will open the auxiliary metal key and let you remove it. There's an opening on each side of the case once the auxiliary's metal is removed. Begin with one side of the case and work your way around using a tape-wrapped screwdriver. Gently break the two halves and set them aside.
You can now replace the battery in the key fob. You don't want to harm the rubber ring on which the battery is positioned. Once the battery has been replaced, you can put it back into the case and take pleasure in your new key fob!
You can locate a replacement battery at most stores that sell batteries. Find a CR2025 battery. These batteries are commonly used in watches and calculators but can also be found at auto parts stores and online. Making the change to the battery in your Mazda 3 is easy and quick, and can save you money when you travel to the dealership.
Key pairing issue
If you've been driving your Mazda 3 for a long time and suddenly it stopped working, there may be a problem in the remote keyless system receiver module. It is more likely to happen in the event that the internal chip on the key fob has been damaged. It could be caused by several factors, such as dropping or wet keys.
Fortunately the key fob's digital chips are protected by rubber seals, and should be fine even with the splash of water. However, submerging it in the pool or ocean water is the most serious risk because the highly conductivity of salt could damage the electronics.
If your key fob will not function, you might need a new battery. A quick search on web will reveal that there are numerous third-party replacement batteries. However, it's important to remember that they may not be compatible with your Mazda 3. It's a good idea to purchase one from a dealership and make sure that it's certain to work with your vehicle.
After you've replaced your battery the key fob should function again. If the remote does not respond when you press the lock button, it's likely that the key is stuck in power saving mode. To remove it from this mode it's necessary to press the lock button five times, and hold it until the red light blinks.
Reprogramming the key
The keyless entry system that comes with a Mazda allows you to unlock and start the car without using the regular key. It's a great feature, but the process of programming the remote or the key can be confusing for some. It also requires a special machine that only the dealer or automotive locksmith has access to. This machine is connected the vehicle's computer and starts the process of programming for the new key or remote.
The first step is having at minimum two keys that work for the Mazda. You can then proceed to changing the programming of a spare key. The functions of the new FOB will be temporarily disabled to protect the vehicle from theft. Once you've resettled the new key, you can enable these functions in the future.
After that, you can use the new key to unlock the doors and then start the engine. Check mazda 2 battery key out first to make sure it is working. If you're worried about losing the keys, it is best to keep a spare key on hand.
It is simple to add a spare Mazda key. You can save money by following these easy steps. This will save you money on towing costs and an extra key.