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

Whether you dropped your key fob on the ground or it has stopped working, it's always an excellent idea to keep an extra key in your pocket. This article will show you how to add, change or reprogramme the Mazda 3 keyfobs.

Note: Some keys require programming by an expert locksmith, while others do not. Only use authentic Mazda replacements to replace your key fob.

How to add a spare key

If you're not fortunate enough to receive a spare keys from the dealer when you buy your Mazda 3 or accidentally break your current key Don't fret, there is still an option to make another key. You'll need to use the flathead screwdriver, as well as an CR2025 battery. Once you've got the tools, it is time to open the key fob. First look for the auxiliary key release button. It's located under the metal part and is easy to locate. The back cover should slide off the moment you press the button. Then, insert the screwdriver's head in the notch on top or the space, and pull the metal piece off.

After the auxiliary key has been removed, insert the new or spare key into the slot. Turn the ignition on and wait for about 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 is important to remember that you can only program up to three keys for your Mazda 3. The last thing you want is to have more than two functioning key fobs and not being in a position to get your car started. This is a safeguard to stop unauthorised users from activating your keys and starting your car.

How to Reprogram a spare key

It's smart to learn how you can reprogram an extra key in the event that your original key gets lost or stolen. This will prevent unauthorized people from opening your car or stealing it. This will work with any Mazda. You will need two keys that are working to start the reprogramming process. If you don't have two working keys then it's best to bring your Mazda to the dealer to have this completed.

Start by getting into the driver's position and closing all the doors except the one that is open. Turn the ignition on and then insert the first working key. Wait for five seconds, then remove the key and repeat the process with a second working key.

After programming your new key, you should have 3 keys that work to start your car in the near future. Test each key to make sure that they're operating correctly before placing them away.

It is advisable to purchase a spare Mazda 3 remote, especially when your car is susceptible to issues. You can purchase one online or in your local auto store. Make sure you read reviews before purchasing so that you don't get an item that isn't compatible with your vehicle.

How to change the battery on a spare key?

It's awful to discover that your key fob has died, and you are locked out of your car. It's not a problem to replace the battery and save some cash at the dealership.

Press the auxiliary key button at the back of the keyfob. This will take out the key made of metal and reveal the slots on both sides of the case. Put the flathead screwdriver in one of these slots, and gently take apart the two parts of the case. When the battery is completely exposed, take it out and set aside the case somewhere you won't forget it.

Before you begin, make sure that you have a new replacement battery. These batteries can be purchased at any retailer that sells batteries or from a mazda key fob dealer in Winter Garden. The correct battery is essential to make sure that your keyfob functions properly.

Replace the battery cap and then install the new battery. Be careful not to damage the small rubber ring the battery is placed on. The two halves should be pressed together until you hear a click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It also serves as an important security feature. If you lose your key or had it stolen the car won't start even if you've got the spare fob. The key fob has to be reprogrammed by a dealer to enable it to function again. This can be a costly and frustrating ordeal and it's a good idea to learn how to reset the system yourself.

To reset the system, remove the battery for approximately 15 minutes. This will eliminate any remaining power from the on-board computer. Then, disconnect both connectors for the LF-ECU and the demand switch connectors. Check for continuity between the following terminals:

Place the key in the slot, then turn the ignition ON. The ignition should be turned off after about five minutes. The information from the key will be added to the vehicle's computer and the new fob will be able start your car in the future. You can program up to three fobs but you should only use one at each time. This will keep unauthorised individuals from stealing your key and getting access to your vehicle. You can purchase a replacement keyfob online, but it still needs to be cut and programmed by a dealer.