How to Add, Change, and Reprogram a Mazda 3 Spare Key
It's a good idea always to keep an extra key at hand in case you lose the keyfob you were using or it has stopped working. This article will provide everything you need to learn about adding, changing, or reprogramming your Mazda 3 key fobs.
A word of caution Some keys require programming by a locksmith professional or dealer, while other keys do not. Use only genuine Mazda replacements to replace your key fob.
How to add a spare key
If you're not lucky enough to receive a spare keys from the dealer when you buy your Mazda 3 or accidentally break your current one but don't worry, there is still the option of adding another key. To accomplish this, you'll need an inexpensive flathead screwdriver as well as an CR2025 battery that's new. Once you have the items then it's time to open the key fob. First find the key release button for the auxiliary key. The button is on the underside the metal part. It's easy to find. The back cover should come off as soon as you press the button. Then, you can insert the screwdriver's head into the notch on top or into the space and remove the metal part.
Once the auxiliary key is removed, insert the new or spare key into the slot. Turn the ignition on and then wait for around five seconds before turning it to off. This will add the new key's information to the system that will allow it to start your car in the future.
It is only possible to program three keys in your Mazda 3. The final thing you want is to have more than two working key fobs, and not be in a position to get your car started. This is a security measure designed to stop unauthorized users, like valet drivers who are not authorized to use your key and starting your vehicle.
How do I reprogram an unrepaired key
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If you have a spare key it's best to be aware of how to reprogram it in case the original key you had is stolen or lost. This will stop unauthorized persons from starting your car or taking it. This process is compatible with any Mazda but you'll need two working keys to begin the reprogramming. If you don't own two keys that work, it's best to take your Mazda to the dealer to have this completed.
Start by stepping into driver's seat, closing all the doors except the one that is open. Set the ignition to ON and then insert the first working key. Then wait five seconds before taking out the key. Repeat the process with the second key.
After you've completed programming your new key, you should have three working keys that you can use to start your car in the future. Before placing each key in storage, make sure that it's functioning properly.
It is advisable to purchase an extra Mazda 3 remote, especially in the event that your vehicle is prone to problems. You can buy one online or at a local automotive store. Make sure to review the reviews before buying so that you don't get a key fob which isn't compatible with your car.
How do you change the battery using a spare key
It's a nightmare to discover that your key fob is dead and you're unable to unlock your car. It's simple to replace the battery yourself and save money at the dealership.
Press the auxiliary button on the back of the keyfob. This will remove the auxiliary key and expose two slots on the sides of the case. Press the flathead into one of these slots and then gently pry the two halves of the case apart. Once the battery is fully exposed, take it out and place the case somewhere that you won't forget about it.
Make sure you have an extra battery in place prior to beginning. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. Using the right type of battery will ensure that your key fob functions properly.
Then, place the new battery in the correct place and replace the battery cap. Be careful not damage the rubber ring that holds the battery. The two halves should be pressed together until you hear the click.
How do I reset the Keyless Entry System
The Mazda 3 key fob is not just a practical feature. It also serves as an element of security. If you lose your key or had it stolen the car won't start even if it has the spare key fob. The key fob should be reprogrammed by the dealer to allow it to work again. This can be a painful and expensive ordeal. So, it's best to learn how you can reset the system.
Disconnect the battery from the system for 15 minutes. This will clear any residual electric current from the onboard computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. After that, test for continuity between the following terminals:
Insert the key into the slot and turn the ignition ON. Keep https://www.thekeylab.co.uk/mazda-car-keys/ in place for about five seconds and then turn off. The information from the key will be added to the vehicle's computer, and the new fob will be able to start your car in the future. You can program up to three fobs, however, you should only use one at each time. This will prevent unauthorized persons from copying the key and gaining access to your vehicle. You can purchase a new key fob online, but you'll still need to go to an authorized locksmith or dealer to have it cut and programmed.
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