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How to Add, Change, and Reprogram a Mazda 3 Spare Key
It's a good idea always to have an extra key on hand no matter if you've dropped the keyfob you were using or it stopped working. This article will show you how to add, modify or reprogramme your Mazda 3 keyfobs.
Certain keys require programming from an experienced locksmith, whereas others do not. Make sure you only make use of official Mazda replacements for your key fob.
How do you add an extra key
If you're unable to find a spare key from the dealer when you purchase your Mazda 3 or accidentally break your current one Don't fret, there is still a way to add another key. You'll need a flathead screwdriver, and the CR2025 replacement battery. Once you've got these tools, it's time to open up the key fob and replace the battery. Locate the key release auxiliary. It's located underneath the metal portion and is 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 or spacing on the top of the metal component and pull it off.
Insert the spare or new key into the slot after taking out the auxiliary key. Set the ignition ON and wait for about five seconds, and then turn it to OFF. This will register the new key's information into the system and allow it to start your car in the future.
It is only possible to program three keys into your Mazda 3. The last thing you want is to have more than two working key fobs but not be capable of getting your vehicle started. This is a security measure designed to prevent unauthorised users, such as valet drivers who are not authorized to use your key and thereby launching your vehicle.
How to Reprogram a spare key
If you have a spare key it's important to know how to program it in the event your original key is lost or stolen. This will prevent unauthorised persons from abusing your vehicle and re-starting it. This will work with any Mazda. You'll need two keys that work for the reprogramming to begin. If you don't own two keys that work, it's best to take your Mazda to a dealer to have this done.
Begin by getting in your driver's seat and shutting the door, excluding for the one that's been opened. Set the ignition to ON and insert the first working key. Then wait five seconds before taking out the key. Repeat the process with the second key.
After you finish programming your new key, you should have 3 keys that start your vehicle in the future. Before placing each key in storage, make sure it's working properly.
You should think about buying an extra Mazda 3 remote, especially when your car is susceptible to issues. It's possible to find one on the internet or at your local auto store, but be sure to read reviews prior to purchasing so you aren't purchasing one that's not compatible with your vehicle.
How do I change the battery using a spare key
There's nothing more frustrating than finding that the battery on your key fob died and you can't unlock your car. It's simple to replace the battery yourself and save money at the dealership.
Press the auxiliary key button at the back of the keyfob. This will take out the metal key that is used as an auxiliary key, and expose slots on both sides of the case. Place the flathead in one of these slots and gently pry the two halves apart. When the battery is fully exposed, take it out of the case and put it somewhere you will not forget about it.
Be sure to have a new battery ready before you start. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. The correct battery is crucial to ensure that your key fob functions properly.
Then, put the new battery in place and replace the cap on the battery. Be careful not to scratch the rubber ring that holds the battery. The two halves should be pressed together until you hear the click.
How to Reset a Keyless Entry System
The Mazda 3 key fob is not just a practical feature. It also serves as a security measure. The car won't start if the key is stolen or lost even if you have an extra key fob. The key fob has to be reprogrammed by a dealer to make it work again. It can be a frustrating and expensive ordeal. So, it's best to know how to reset the system.
To reset the system, unplug the battery for about 15 minutes. This will erase any residual electricity from the onboard computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. Then, verify mazda replacement key between the following terminals:
To program the new key or spare, insert it into the slot and turn the ignition to ON. Keep the key in place for about five seconds and then switch off. The key's information will be added to the vehicle's computer and the new fob will be able start your vehicle in the future. You can program up to three fobs, however, you must only use one at each time. This will prevent unauthorized people from stealing your key and gaining access to your car. You can purchase a replacement key fob online, but you'll still need to visit an authorized locksmith or dealer to have it cut and programmed.