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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 stopped working. This article will cover everything you must be aware of adding, changing, or changing the programming of your Mazda 3 key fobs.

A word of caution Some keys require programming by a locksmith professional or dealer, whereas others don't. Make sure you use only genuine mazda keys replacements to replace your key fob.

How do I add a spare key?

You can also add an additional key if you don't have a spare key available or in the event that you break your current one. You'll need the flathead screwdriver, as well as the CR2025 replacement battery. Once you have the items then it's time to open the key fob. First look for the auxiliary key release button. It's on the underside of the metal part and is easy to find. Once you hit the button, the back cover should fall off right away. Then, place the screwdriver's head in the notch at the top or in the space, and take the metal part away.

Insert your spare key or a new one into the slot following the removal of the secondary key. Turn on the ignition and wait for five seconds, and then turn it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to keep in mind that you can only program up to three keys for your mazda 3 car key 3. The most important thing is to have more than two working key fobs but not be capable of getting your vehicle started. This is a precautionary measure to stop unauthorized users from activating your key fobs and starting your vehicle.

How to Reprogram a Spare Key

If you have a spare key it's best to know how to program it in the event your original key is lost or stolen. This will keep unauthorised persons from starting your car, or taking it. This will work with any Mazda. You will need two keys that are functioning to start the reprogramming process. If you don't own two keys that function, it's best to take your vehicle to a dealer to get this completed.

Begin by getting in your driver's seat, and close the door, except for the one that's opened. Turn the ignition on and insert the initial working key. Then wait five seconds before taking out the key. Repeat the process with the second key.

After you've programmed your new key, you'll have three keys that start your vehicle in the future. Check each key to make sure that they're working properly before throwing them away.

It's a good idea to buy a spare Mazda 3 key fob, especially if you're a driver who has a tendency to lose their keys or has other issues with it. You can buy one online or at your local automotive store, but be sure to read reviews prior to purchasing 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 finding 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 button on the back of the keyfob. This will remove the auxiliary key and expose a slot on both sides of the case. Press the flathead into one of these slots, and then gently pry the two halves apart. Once the battery is fully exposed, remove the case and put it somewhere you will not forget it.

Before you begin, be sure you have a new replacement battery. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The correct type of battery is crucial to ensure that your keyfob works properly.

Next, put the replacement battery in the correct place and replace the battery cap. Be careful not to scratch the small rubber ring that the battery is placed on. The two halves should be pressed together until you hear a click.

How to Reset the Keyless Entry System

The mazda replacement key 3 key fob is not just a convenience. It's also a security feature. The car will not start if your key is stolen or Lost Mazda car key, even if you've got a spare key fob. This is because the key fob has to be reset at the dealership in order to work again. It can be a stressful and costly experience. Therefore, it's recommended to learn how you can reset the system.

To reset the system, unplug the battery for around 15 minutes. This will take out any remaining electrical current from the computer on board. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the following terminals:

Put the key in the slot and turn on the ignition. Keep the key in place for about five seconds and then switch off. The key's information will be saved to your car's computer, and the new fob will be able to start your car in the future. You can program as many fobs as you want but only one can be utilized at any given time. This stops unauthorized individuals from copying your key and getting ahold of your car. You can buy a new key fob online, however you'll still need to visit a dealer or locksmith to get it cut and programmed.