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

If you've dropped your key fob on the ground or it just stopped working, it's best to have an extra key in your pocket. This article will teach you how to add, modify or reprogramme the Mazda 3 keyfobs.

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

How do I add an additional key


If you're unable to receive a spare key from the dealer when you purchase your Mazda 3 or accidentally break the one you have Don't fret, there's an option to make another key. To accomplish this, you'll need a small flathead screwdriver and a new CR2025 battery. Once you've got these items you can remove the key fob and swap the battery. First find the button that allows you to release the key. The button is located on the underside the metal portion. It's easy to locate. The back cover should come off when you press the button. Then, you can insert the screwdriver's head into the notch at the top or into the space and pull the metal piece off.

Insert your spare or new key into the slot after you have removed the additional 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 begin your vehicle in the future.

It is only possible to program three keys in your Mazda 3. You don't want to utilize more than two keys to start your car. This is a safeguard to stop unauthorised users from activating your key fobs and starting your car.

How to Reprogram a spare key

If you have a spare key it's a good idea to be aware of how to program it in the event the original key you had is stolen or lost. This will prevent unauthorised persons from taking your car and then starting it. This process is compatible with any Mazda, though you'll need two working keys to start the reprogramming process. If you don't own two working keys, you should take your Mazda to the dealer to have this completed.

Begin by putting yourself in the driver's seat and closing the door, except for the one that's been opened. Set the ignition to ON and insert the first functioning key. Then wait five seconds before taking out the key. Repeat with the second key.

After you finish programming your new key you should have three keys that be able to start your car in the near future. Before saving each key, be sure it's functioning correctly.

It's a good idea purchase an extra Mazda 3 key fob, especially if your car is one who often loses your key or has other issues with it. You can purchase one online or at your local automotive store, but make sure to read reviews before purchasing so that you can avoid getting a key fob that's not compatible with your car.

How do you change the battery using a spare key

There's nothing worse than discovering that the battery for your key fob has been damaged and you're unable to unlock your vehicle. It's easy to change the battery yourself and save money at the dealer.

Press the auxiliary key button located at the back of the keyfob. This will detach the key from the metal and reveal a slot on each side of the case. Put the flathead screwdriver in one of these slots and then gently break the two sides of the case. Once the battery has been fully exposed, take it out of the case and place it in a spot where you'll never forget it.

Before mazda keys begin, make sure you have a new replacement battery. They can be bought at 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 operates perfectly.

Replace the cap on the battery and then insert the new battery. Be careful not to scratch the small rubber ring that the battery is placed on. Then press the two parts of the key fob together until you hear the sound of clicking.

How to reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It also serves as an element of security. If you lost your key or had it stolen, the car will not start even if you've got the spare fob. This is because the key fob has to be reprogrammed at the dealership in order to function properly. It can be a frustrating and costly ordeal. Therefore, it's recommended to learn how to reset the system.

Remove the battery from the system for 15 minutes. This will take out any remaining electrical power in the on-board computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. Check continuity between the following terminals.

Put the key in the slot and turn the ignition ON. Put the key in for about five seconds, then turn off. The key's information is added to the computer in your car and the new fob is able to start your car. You can program up to three fobs, but you must only use one at a time. This will prevent unauthorized persons from copying your key and getting ahold of your vehicle. You can purchase a brand new key fob online, however you'll still have to visit a dealer or locksmith to cut it and get it programmed.

Website: https://www.autokeys-r-us.co.uk/mazda/