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How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the ground or it simply stopped working, it's best to have a spare key handy. This article will show you how to add, modify, and reprogramme your Mazda 3 keyfobs.

A word of caution Certain keys require programming by a professional locksmith or dealer, whereas other keys don't. Make sure you only make use of official Mazda replacements for your key fob.

How do I add a spare key?

If you're unable to get a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one but don't worry, there's still a way to add another key. To accomplish this, you'll require an incredibly small screwdriver, a flathead screwdriver, and an updated CR2025 battery. Once you have these items you can open the key fob and replace the battery. Locate the auxiliary key release. It's located on the underside the metal portion. It's easy to locate. The back cover should slide off when you press the button. Then, you can insert the head of the screwdriver into the notch or space at the top of the metal component and pull it away.

Insert your spare or new key into the slot following the removal of the accessory key. Set the ignition to ON and wait for around five seconds before turning it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

It is only possible to program three keys to your mazda verisa key replacement 3. You don't want to have to use more than two key fobs in order to start your vehicle. This is a security measure designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and starting your vehicle.

How do I reprogram an unrepaired key?

It's a smart idea know how you can reprogram a spare key in the event that your original key becomes lost or stolen. This will keep unauthorised persons from opening your car or stealing it. This will work with any mazda cx 5 keys locked in car. You'll need two keys that are functioning to begin the reprogramming process. If you don't have the two working keys, you'll have to take your vehicle to a dealership to get it done.

Begin by putting yourself in the driver's seat, and shutting the door, excluding for the one that's opened. Place the working key into the slot, and then set the ignition to the ON position. Then wait five seconds before taking out the key. Repeat the process with the second key.

After you finish programming your new key you should have 3 keys that allow you to start your car in the near future. Test each key to be sure that they're operating correctly before throwing them away.

It's a good idea buy a spare Mazda 3 key fob, especially if you're a driver who has a tendency to lose their keys or has other issues with it. It's possible to find one on the internet or at a local automotive store, but be sure to read reviews before buying so you aren't buying an item that isn't compatible with your car.

How to change the battery on a spare key

It's a nightmare to discover that your key fob is dead, and you are locked out of your vehicle. It's simple to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the key auxiliary to reveal two slots on the sides of the case. Press the flathead screwdriver into one of these slots. Then, gently break the two parts of the case. Once the battery is fully exposed, remove it and place the case somewhere safe from being lost.

Make sure you have a new battery ready prior to beginning. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. The correct type of battery is essential to ensure that your keyfob works correctly.

Then, put the new battery in the correct place and replace the battery cap. Be careful not to scratch the small rubber ring that the battery rests on. Finally press the two halves of the key fob together until you hear the sound of clicking.

How to Reset the Keyless Entry System

The key fob in your Mazda 3 is not only an added convenience, but it's also an important security feature. If you lose your key or have it stolen the car will not start even if you have the spare key fob. The key fob should be reprogrammed by the dealer to make it work again. It can be a frustrating and expensive ordeal. Therefore, it's best to learn how you can reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Then, verify the continuity between the following terminals:

Place the key into the slot, and switch the ignition on. Leave the key in for about five seconds, then switch it off. The key's details will be added to the vehicle's computer, and the new fob will be able to start your vehicle in the future. You can program as many fobs you want however only one must be used at any specific time. This will prevent unauthorised people from stealing your key and getting access to your vehicle. You can purchase a brand new keyfob online, but it must be programmed and cut by an authorized dealer.