The Three Greatest Moments In Mazda 6 Key History How to Add, Change, and Reprogram a Mazda 3 Spare Key

If you've dropped your key fob on the ground or it has stopped working, it's always a good idea to have a spare key handy. This article will teach you how to add, change or reprogramme the Mazda 3 keyfobs.

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

How to add a spare key

You can also add another key in the event that you don't have a spare key, or when you accidentally damage your current one. You'll need an flat-head screwdriver and an CR2025 battery. Once you have these items and are ready to remove the key fob and swap the battery. Locate the key release auxiliary. It's located beneath the metal portion. It's easy to locate. When you press the button, the back cover will fall off instantly. Then, insert the head of the screwdriver into the notch, or the spacing at the top of the metal part and pull it away.

Insert your new or spare key into the slot after removing the secondary key. Set the ignition to ON, and wait for around five seconds before turning it to off. This will add the new key's details to the system that will allow it to start your vehicle in the future.

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

How to Reprogram a spare key

If you have a spare key it's best to know how to reprogram it in case your original key is stolen or lost. This will stop unauthorized persons from stealing your car and starting it. This should work with any Mazda. You'll require two keys that work to begin the reprogramming. If you don't own two keys that work, you should take your car to a dealer to have this done.

Begin by putting yourself in the driver's seat, and closing the door, except for the one that's been opened. Place the working key into the slot, and then turn the ignition to the ON position. After five seconds, remove the key. Repeat the process with the second key.

After you finish programming your new key you should have three keys that will be able to start your car in the near future. Test each key to ensure sure that they're functioning properly before taking them off.

It's a good idea purchase an extra Mazda 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. You can purchase one on the internet or at your local auto store. Be sure to go through reviews prior to purchasing so that you don't get an item that isn't compatible with your car.

How do I change the battery using a spare key

There's nothing worse than discovering that the battery for your key fob has died and you can't unlock your car. It's simple to replace the battery yourself and save money at the dealership.

The first step is to press the auxiliary key button located on the back of the key fob. This will detach the key's metal cover and reveal the slots on both sides of the case. Use the screwdriver's flathead to push it into one of these slots and gently break the two parts of the case. Once the battery has been fully exposed, remove the case and place it somewhere that you will not forget about it.

Before you begin, make sure you have a brand new replacement battery. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is crucial to ensure that your key fob functions correctly.

Next, put the replacement battery into place and replace the battery cap. Be careful not to scratch the small rubber ring that the battery rests on. Press the two halves together until you hear the click.

How to Reset a Keyless Entry System


The Mazda 3 key fob is not just a convenience. It also serves as a security feature. If you lost your key or had it stolen, the car will not start even if you have the spare key fob. The key fob should be reprogrammed by a dealer to enable it to function again. It's a difficult and expensive ordeal. Therefore, it's best to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will remove any residual electrical current from the computer on board. Then, disconnect mazda dealership key replacement LF -ECU and demand switch connectors. Then, check continuity between the following terminals:

To program the new key or spare, insert it into the slot and turn the ignition to ON. Put the key in for around five seconds, and then switch it off. The key's information 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 must only use one at a time. This will stop unauthorized individuals from stealing your keys and getting access to your vehicle. You can buy a new keyfob online, however it must be programmed and cut by an authorized dealer.