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

It's a good idea to keep an extra key in your pocket regardless of whether you lost your keyfob, or it was unable to function. This article will teach you how to add, alter, and reprogramme your Mazda 3 keyfobs.

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

How to Add a Spare Key

If you're not fortunate enough to get a spare key from the dealer when you purchase your Mazda 3 or accidentally break your current one but don't worry, there's the option of adding another key. You'll need an flat-head screwdriver and an CR2025 battery. Once you've got these items you need, it's time to open the key fob. Locate the auxiliary key release. It's located on the underside of the metal part. It's easy to find. Once you press the button, the back cover should fall off right away. Then, you can insert the screwdriver's head into the notch or space at the top of the metal component and pull it off.

After the auxiliary keys are removed, insert your new or spare key into the slot. Turn the ignition on and wait for approximately five seconds before turning it to OFF. This will add the new key's information into the system and allow it to start your vehicle in the future.

You can only program three keys on your Mazda 3. You don't want to utilize more than two key fobs in order to start your car. This is a safety measure that is designed to block unauthorized users, such as valet drivers, from activating your key and starting your vehicle.

How to Reprogram a spare key

It's a smart idea to know how you can reprogram a spare key in the event that your original key becomes lost mazda car key or stolen. This will prevent unauthorised persons from abusing your vehicle and re-starting it. This method should work on any Mazda however you'll need two working keys to start the reprogramming process. If you don't have two keys that function it's recommended to take your vehicle to a dealer to get this done.

Start by stepping into driver's position and close all the doors with the exception of the one that is open. Set the ignition to ON and insert the first functioning key. Wait five seconds, then remove the key and repeat the procedure with the second key.

Once you've finished programming your new key, you should have three keys that you can use to start your car in the future. Before storing each key, make sure that it's working correctly.

It's a good idea to purchase an extra mazda replacement key 3 key fob, especially if you're a driver who often loses your key or has other issues with it. You can buy one online or at your local automotive store, but make sure to read the reviews prior to purchasing so you aren't buying the wrong key fob compatible with your vehicle.

How to Change the Battery on a spare key

It's depressing to find out that your key fob has died and you're unable to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

Press the auxiliary key button on the back of the keyfob. This will remove the metal auxiliary key and expose a slot on both sides of the case. Use the screwdriver's flathead to push it into one of these slots. Then, gently remove the two sides of the case. After the battery is fully exposed, remove the case and put it somewhere you will not forget about it.

Be sure to have an additional battery before you start. These batteries can be purchased at any store selling batteries or from a Mazda dealer in Winter Garden. The correct battery is essential to ensure that your keyfob is working properly.

Next, put the replacement mazda 3 key battery in place and replace the cap of the battery. Be careful not damage the rubber ring on which the battery rests. Finally press the two halves of the key fob together until you hear the sound of a click.

How do I reset the Keyless Entry System

The key fob that you have in your Mazda 3 is not only an extra convenience, but 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 fob. The key fob must be reprogrammed by a dealer to allow it to work again. It's a difficult and costly process. Therefore, it's best to understand how you can reset the system.

Disconnect the battery from the system for 15 minutes. This will take out any remaining electrical current from the computer on board. Then, disconnect both the LF-ECU connector and the demand switch connectors. Verify that the connections are in good order between the terminals.

Put the key in the slot, then turn the ignition ON. Keep the key in place for around five seconds and then switch off. The key's details are now transferred to the computer of your vehicle and the new fob is able to start your car. You can program as many fobs as need but only one can be utilized at any particular time. This will keep unauthorised individuals from stealing your key and getting access to your vehicle. You can purchase a brand new keyfob online, but it still needs to be programmed and cut by an authorized dealer.