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 always recommended to keep an extra key in your pocket. This article will provide everything you need to learn about the process of adding, changing, and changing your Mazda 3 key fobs.

A word of caution Some keys require programming by a professional locksmith or dealer, whereas other keys don't. Make sure to make use of official mazda 2 key replacements for your key fob.

How do I add an extra key

If you're unable to receive a spare keys from the dealer when you purchase your Mazda 3 or accidentally break your current one do not fret -- there's still an option to get another key. You'll need an flat-head screwdriver and a new CR2025 battery. Once you've got these tools, it's time to remove the key fob and swap the battery. Locate the auxiliary key release. It's located on the underside the metal portion. It's easy to locate. When you press the button, the cover should be removed immediately. Next, insert the screwdriver's head into the notch or the space at the top of the metal part and pry it off.

After the auxiliary keys are removed, insert the new or spare key into the slot. Switch the ignition on and wait for about five seconds, and then turn it to off. This will register the new information on the key to the system that will allow it to start your vehicle in the future.

It is only possible to program three keys in your mazda replacement keys 3. The one thing you don't want is to have more than two functioning key fobs, and not be capable of getting your vehicle started. This is a safety precaution designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and starting your car.

How to Reprogram a spare key

It's smart to know how you can reprogram a spare key in the event that your original key is lost or stolen. This will keep unauthorised persons from opening your car or taking it. This will work with any Mazda. You'll require two keys that are working to start the reprogramming process. If you don't have two functioning keys, you'll have to bring your car to the dealership to get it done.

Start by getting into the driver's seat and closing all the doors except the one that is open. Put the first working key into the slot, then turn the ignition to ON. Take five seconds before removing the key. Repeat with the second key.

After you finish programming your new key, you should have three keys that work to start your vehicle in the future. Test each key to ensure sure that they're working properly before throwing them away.

It's a good idea purchase an extra Mazda 3 key fob, especially if your car is one who is prone to losing keys or has other issues with it. You can find one online or at your local auto store, but make sure to read reviews before buying so you can avoid getting the wrong key fob compatible with your car.

How to change the battery on a spare key

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

The first step is to press the auxiliary button on the back of the key fob. This will release the key made of metal and reveal a slot on each side of the case. Put the flathead into one of these slots, and gently pry the two halves of the case apart. When the battery is completely exposed, remove it and place the case somewhere safe from being lost.

Before you start, make sure that you have a new replacement battery. You can find these in any store that sells batteries or at a Mazda dealer near Winter Garden. Using the right type of battery will ensure that your key fob works effectively.

Replace the cap of the battery and then put in the new battery. Be careful not to damage the rubber ring on which the battery rests. Press the two halves together until you hear the click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security feature. The car will not start if the key is lost or stolen even if you have a spare key fob. The key fob must be reprogrammed by the dealer to make it work again. This can be a painful and expensive ordeal. Therefore, it's best to know how to reset the system.

Remove the battery from the system for 15 minutes. This will erase any residual electrical power in the on-board computer. Next, disconnect both the LF-ECU connector as well as the demand switch connectors. Check for continuity between the terminals.

To program the new key or spare, insert it into the slot and turn the ignition to ON. Switch off the ignition after about five minutes. The key information will now be transferred to your vehicle's computer and the new fob will be able start your car in the future. You can program any number of fobs you want, but only one should be used at a certain time. This will stop unauthorized individuals from stealing your key and getting access to your vehicle. You can purchase a brand new keyfob online, however it'll still need to be cut and programmed by a dealer.