How to Fix Common Mazda 3 Key Problems
The Mazda 3 is an elegant compact car that has a luxurious interior and a responsive handling. It's also an excellent value compared to other small cars available.
It's a real hassle to lose keys. It can be costly to replace keys that are lost, as well as transporting your vehicle to the dealer to reprogram your key.
The key is not able to lock or unlock the door.
It's risky to lock the doors without locking them, especially when the vehicle is moving. If the door is opened while the vehicle is moving, it could cause passengers to fall out or get injured. Keep keys out of the reach of children to avoid this issue. Children may find them interesting and want to play with them. This could cause the power window or other controls to malfunction and even cause the vehicle to move.
If you notice that the key fob won't lock or unlock the doors, the battery may be dead. The button cell battery in the keyfob has a limited life span, therefore it is important to replace it on a regular basis. A good battery can last between two and four years. It is crucial to replace the battery by a replacement with the same voltage and same dimensions as the initial.
Another reason for why the key fob might not be working is a key pairing issue. It could be that the key fob was not connected properly with the car when it was first purchased. In this instance the dealer needs to reprogramme it. Fortunately it can be done in just a few minutes. The dealership can also reset any residual electricity remaining in the computer on board. This won't fix the issue with your key fob's inability lock or unlock doors.
Dead coin battery
It's possible that your battery is dead if the key fob isn't turning on or unlock your vehicle. This is a common issue but it is one that can be repaired. You can replace your battery yourself and avoid the hassle of going to a dealer. The process is simple and requires only a few tools.
Press the auxiliary key button on the back of the Mazda flip key. This will open the metal auxiliary key and let you take it off. Once the metal auxiliary key is removed, you'll see the slot on either side of the fob case. Make use of a tape-wrapped flathead screwdriver pry open the case, starting with one side first and then the other. Gently pull the two halves of the case apart and set them aside.
Now you'll be able see clearly of the battery on the key fob and can therefore replace it. Be careful not to damage the ring of rubber that the battery is placed on. Once the battery is replaced, you can put it back into the case and enjoy your new key fob!
The majority of stores that sell batteries carry a replacement battery. Find a CR2025 battery. These batteries are commonly used in calculators and watches, however, they can be bought at auto parts stores, or online. It's simple and fast to replace the battery in your Mazda 3. This will save you money by avoiding an appointment with a dealer.
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. This is particularly true in the event that the key fob's chip is damaged. This can be caused by many factors such as a dropped or wet key.
emergency are protected by rubber seals therefore a raindrop will not cause damage to them. However, submerging it into swimming pool or ocean water can be an issue that is much more severe due to the highly electrically conductivity of salt may cause damage to the electronic components.
If your key fob isn't working, you're likely in need of an upgrade to the battery. A quick search on internet will show that there are countless third-party replacement batteries. But, it's important to be aware that they may not be compatible with your Mazda 3. It's best to purchase one from a dealer and make sure it's guaranteed to work for your vehicle.
After you've replaced your battery, your key fob should be working again. If the remote doesn't respond when you press the lock button, it is likely that the key has been stuck in power saving mode. To get it out of this mode it's necessary to press the lock button five times, and then hold it down until the red light blinks.
Reprogramming the key

The keyless entry system of the Mazda allows you to open and start the car without the traditional key. It's a wonderful convenience, but the process of reprogramming your remote or key could be confusing for some people. This requires a machine that is available only to the locksmith in the car or dealer. This machine is connected to the vehicle's computer, and begins the programming procedure for an entirely new remote or key.
The first step is having at least two keys that function for the Mazda. Then you can begin the reprogramming procedure of a spare key. The functions of the new FOB will be temporarily removed to protect the vehicle from theft. After you've reprogrammed the key, you'll be able to activate these functions in the future.
You can now use the new key for the ignition and also to open the doors. You should test it first to ensure it works. If you're worried about losing keys, it is a good idea to keep a spare key in the back of your hand.
It's easy to add the spare Mazda key. Follow these steps and save a considerable amount of money, as you don't have to pay for the dealership to complete the task for you. This will also help you avoid the expense of a tow and also save money on a spare key.