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

It’s a good idea to keep a spare key on hand regardless of whether you lost your keyfob or it stopped working. This article will cover everything you need to learn about adding, changing, or programming your Mazda 3 key fobs.

A word of caution Certain keys need to be programmed by a professional locksmith or dealer, whereas other keys do not. Make sure to use genuine Mazda replacements for your key fob.

How to add an extra key

You can also add a second key if you don’t have a spare key or if you accidentally break the one you already have. You’ll need an flat-head screwdriver and an CR2025 battery. Once you’ve got all the equipment you need, it’s time to open the key fob. Find the auxiliary key release. It’s located on the underside of the metal component and is easy to find. Once you hit the button, the back cover should fall off right away. Then, you can insert the screwdriver’s head into the notch at the top or the space and remove the metal part.

After the auxiliary keys are removed, insert the new or spare key into the slot. Turn on the ignition and wait for approximately five seconds before turning it to off. This will register the new key’s details to the system which will allow it to start your car in the future.

You can only program three keys in your Mazda 3. The final thing you want is to have more than two working key fobs and not being in a position to get your vehicle started. This is a safety measure to stop anyone who is not authorized from activating your key fobs and starting your vehicle.

How to Reprogram a spare key

It’s a smart idea to learn how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from starting your car or taking it. This process is compatible with any Mazda, though you’ll need two keys working to begin the reprogramming. If you don’t have two working keys, you’ll need take your vehicle to the dealership to complete the process.

Begin by putting yourself in the driver’s seat and close the door, except for the one that’s been opened. Set the ignition to ON and insert the first functioning key. After five seconds, take the key out and repeat the procedure with the second working key.

Once you’ve completed programming your new key, you should have 3 keys that will start your vehicle in the future. Before placing each key in storage, make sure that it’s working correctly.

You should think about buying an extra Mazda 3 remote, especially in cases where your car is prone to issues. You can purchase one online or at your local auto store. Make sure to look up reviews before you purchase to ensure you don’t buy a key fob which isn’t compatible with your car.

How to change the battery using a spare key

It’s very frustrating to discover that your key fob has died and you’re not able to unlock your car. Fortunately, it’s easy to replace the battery and save some cash at the dealership.

Press the auxiliary key button at the back of the keyfob. This will remove the key auxiliary and reveal slots on both sides of the case. The flathead should be inserted into one of these slots and then gently pry the two halves apart. When mazda verisa key replacement is fully exposed, remove the case and place it somewhere you will not forget about it.

Be sure to bring a replacement battery before you start. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. Using the right type of battery will ensure that your key fob functions effectively.

Then, put the new battery into place and replace the cap of the battery. Be careful not to damage the rubber ring that holds the battery. The two halves should be pressed together until you hear a click.

How do you 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 lost your key or had it stolen the car won’t start, even if you have the spare fob. This is because the key fob needs to be reprogrammed by the dealership to work properly. It can be a stressful and expensive ordeal. Therefore, it’s best to learn how you can reset the system.

To reset the system, remove the battery for about 15 minutes. This will remove any remaining power from the on-board computer. Next, disconnect both the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

To program an entirely new key or spare, insert it into the slot and turn the ignition to ON. The key should remain in the ignition for about five seconds, then turn off. The key’s details will be added to your vehicle’s computer and the new fob will be able start your vehicle in the future. You can program as many fobs as need, but only one should be in use at any certain time. This will stop unauthorised people from copying the key and getting ahold of your car. You can buy a new keyfob online, however it still needs to be programmed and cut by an authorized dealer.