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 an excellent idea to keep a spare key handy. This article will explain everything you should learn about adding, changing, or changing your Mazda 3 key fobs.
A word of caution Certain keys need to be programmed by a locksmith professional or dealer, whereas others don't. Make sure you use only authentic Mazda replacements to replace your key fob.
How to add a spare key
If you're not lucky enough to receive a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current one but don't worry, there's still the option of adding another key. To accomplish this, you'll need an inexpensive flathead screwdriver as well as the new CR2025 batteries. Once you've got these items then it's time to open the key fob to change the battery. Locate the key release auxiliary. It's located underneath the metal component and is easy to find. The cover on the back should fall off the moment you press the button. Next, insert the head of the screwdriver into the notch or the space on the top of the metal piece and pry it off.
Once the auxiliary key is removed, insert the new or spare key into the slot. Turn on the ignition and wait for about five seconds before turning it to OFF. This will add the new key's details to the system which will allow it to start your vehicle in the future.
It is only possible to program three keys in your Mazda 3. The one thing you don't want is to have more than two functioning key fobs and not being capable of getting your vehicle started. This is a security measure to prevent unauthorized users from activating your keys and starting your vehicle.
How do you reprogram a spare key?
It's a smart idea to know how to reprogram an extra key in the event that the original key is lost or stolen. This will stop unauthorised people from abusing your vehicle and re-starting it. This should work with any Mazda. You will require two keys that are working for the reprogramming to begin. If mazda key programming don't have two functioning keys, you'll have to bring your car to the dealership to have it done.
Start by stepping into the driver's seat and close all the doors, except the one that is open. Turn the ignition on and insert the first working key. Then wait five seconds before taking out the key. Repeat with the second key.
After you've completed programming your new key, you should have three working keys you can use to start your vehicle in the future. Test each key to ensure sure that they're functioning properly before placing them away.
It's a good idea buy a spare Mazda 3 key fob, especially if you're a driver who often loses your key or has other issues with it. You can buy one online or at your local auto store, but make sure to read the reviews prior to purchasing so you aren't purchasing a key fob that's not compatible with your car.
How do you change the battery with a spare key?
It's awful to discover that the key fob you used to use has gone out and you're unable to unlock your car. Luckily, it's easy to replace the battery and save some money at the dealership.
Press the auxiliary key button at the back of the keyfob. This will remove the metal key that is used as an auxiliary key, and expose an opening on both sides of the case. Place the flathead in one of these slots, and then gently push the two halves apart. Once the battery is fully exposed, take it out of the case and place it somewhere you will not forget about it.
Before you start, make sure that you have a new replacement battery. You can purchase them at any store that stocks batteries or at an Mazda dealer close to Winter Garden. Using the correct type of battery will ensure that your key fob functions properly.
Next, put the new battery in place and replace the battery cap. Be careful not to scratch the small rubber ring the battery rests on. Press the two halves together until you can hear the click.
How do I reset the system's Keyless Entry System
The key fob inside your Mazda 3 is not only an option for convenience, it's an important security feature. If you lose your key, or have it stolen the car won't start even if you've got the spare key fob. This is because the fob that you have to be reset at the dealership to function properly. It can be a costly and stressful experience therefore it's a great idea to understand how to reset the system yourself.
To reset the system, disconnect the battery for approximately 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect the LF -ECU and demand switch connectors. Check for continuity between the following terminals:
Place the key into the slot, and turn the ignition ON. Keep the key in place for around five seconds, and then turn it off. The key's information will be added 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 desire, but only one should be used at any given time. This will prevent unauthorized people from stealing your key and getting access to your car. You can purchase a new keyfob from the internet, however it will still need to be cut and programmed by an authorized dealer.