How to Add, Change, and Reprogram a Mazda 3 Spare Key
It's a good idea always to keep an extra key in your pocket, whether you dropped your keyfob or it stopped working. This article will explain everything you must be aware of adding, changing, and programming your Mazda 3 key fobs.
Certain keys require programming by professional locksmiths, while others do not. Be sure to only use genuine mazda key fob programming replacements for your key fob.
How do I add an extra key
You can add an additional key if you don't have a spare key available or in the event that you break the one you have. To do this, you'll need an inexpensive flathead screwdriver as well as an updated CR2025 battery. Once you've got these items you can open up the key fob and swap the battery. Find the auxiliary key release. It's located under the metal piece and is easy to find. Once you press the button, the cover should slide off immediately. Next, place the head of the screwdriver into the notch or spacing at the top of the metal component and pull it away.
Once the auxiliary key is removed, insert the new or spare key into the slot. Set the ignition to ON, and wait for around five seconds before turning it to OFF. This will register the new key's information into the system and allow it to start your vehicle in the future.
You can only program three keys in your mazda car key 3. You don't want to utilize more than two key fobs in order to start your vehicle. This is a precautionary measure to stop unauthorized users from activating your keys and then starting your car.
How to Reprogram a Spare Key
It's a smart idea to learn how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorized persons from taking your car and then starting it. This process should work on any mazda key fobs but you'll need two keys working to begin the reprogramming process. If you don't own two working keys then it's best to bring your vehicle to a dealer to get this done.
Start by stepping into driver's seat, closing all the doors except the one that is open. Set the ignition to ON and insert the initial working key. Then wait five seconds before taking out the key. Repeat the process with the second key.
Once you've completed programming your new key, you'll have three keys that will be able to start your car in the future. Test each key to make sure that they're operating correctly before putting them away.
It is advisable to purchase a spare Mazda 3 remote, especially in the event that your vehicle is prone to issues. You can purchase one on the internet or in your local auto store. Be sure to read reviews before purchasing to ensure that you don't get one that's not compatible with your vehicle.
How to change the battery with a spare key?
There's nothing worse than finding that your key fob battery has been damaged and you're unable to unlock your car. It's easy to replace the battery yourself and save money at the dealership.
Press the auxiliary key button at the back of the keyfob. This will release the key's metal cover and reveal a slot on each side of the case. The flathead should be inserted into one of these slots and then gently pry the two halves of the case apart. After the battery is fully exposed, take it out of the case and put it in a place where you won't forget it.
Be sure to bring a replacement battery before you start. They can be bought at any store selling batteries or from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob is working correctly.
Next, put the new battery in its place and then replace the cap on the battery. Be careful not to scratch the small rubber ring the battery is placed on. The two halves should be pressed together until you hear a click.
how to fix mazda key fob to Reset a Keyless Entry System
The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security feature. The car won't start if the key is stolen or lost even if you have a spare key fob. This is because the key fob has to be reset at the dealership in order to work once more. It can be a stressful and costly experience. Therefore, it's best to understand how you can reset the system.
Disconnect the battery from the system for 15 minutes. This will clear any residual electricity from the on-board computer. Then, disconnect the LF -ECU and demand switch connectors. Then, check continuity between the following terminals:
(Image: https://www.thekeylab.co.uk/wp-content/uploads/sb-instagram-feed-images/308785165_499195788347328_5859105632268553197_nlow.jpg)Place the key into the slot, then turn the ignition ON. Turn off the ignition after approximately five minutes. The key information is now added to the vehicle's computer and the new fob can start your car. You can program as many fobs you want however only one must be utilized at any certain time. This will stop unauthorised people from copying your key and gaining access to your vehicle. You can buy a new keyfob from the internet, however it must be cut and programmed by an authorized dealer.
