How to Add, Change, and Reprogram a Mazda 3 Spare Key
Whether you dropped your key fob on the floor or it has stopped working, it's always best to have a spare key handy. This article will show you how to add, alter and re-programme your Mazda 3 keyfobs.
A word of caution: some keys require programming by a professional locksmith or dealer, whereas other keys do not. Make sure you use only genuine Mazda replacements to replace your key fob.
How to Add a Spare Key
You can add a second key if you don't have a spare key available or if you accidentally break the one you have. You'll need the flathead screwdriver, as well as an CR2025 battery. Once you have these items, it's time to access the key fob and change the battery. First look for the button that allows you to release the key. It's located under the metal part and is easy to locate. When you press the button, the back cover should be removed immediately. Next, place the head of the screwdriver into the notch or the space on the top of the metal part and then pull it off.
Once the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition to ON, and wait about five seconds before turning it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.
You can only program three keys in your Mazda 3. You don't want to use more than two keys to start your car. This is a security precaution that is designed to block unauthorized users, like valet drivers, from activating your key and starting your vehicle.
How do you reprogram a spare key
It's a smart idea be aware of how to reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from starting your car, or taking it. This will work with any Mazda. You'll require two keys that are working to start the reprogramming process. If you don't own two keys that function, you should take your Mazda to the dealer to get this completed.
Begin by getting in your driver's seat and close the door, with the exception for the one that's open. Insert the first working key in the slot, then set the ignition to the ON position. mazda 3 car keys before removing the key. Repeat with the second key.
Once you've finished programming your new key, you'll have three working keys that you can use to start your car in the future. Before placing each key in storage, make sure that it's functioning properly.
It's a good idea to buy an extra Mazda 3 key fob, particularly if you're a driver who is prone to losing keys or has other issues with it. You can buy one online or at your local auto store. Make sure to read reviews before purchasing to ensure that you don't get the wrong key fob that isn't compatible with your car.
How do I change the battery on a Spare Key
It's awful to discover that your key fob has failed and you're locked out of your car. It's easy to change the battery yourself and save money at the dealer.
The first step is to press the auxiliary key button that is located on the back of the key fob. This will release the key made of metal and reveal the slots on both sides of the case. Press the flathead screwdriver into one of these slots and then gently take apart the two halves of the case. Once the battery is fully exposed, take it out of the case and place it in a place where you won't forget about it.
Be sure to have an extra battery in place prior to starting. These batteries can be purchased at any store that sells batteries or from a Mazda dealer in Winter Garden. The correct battery is essential to ensure that your key fob functions properly.
Next, put the new battery in place and replace the cap on the battery. Be careful not to damage the small rubber ring the battery is placed on. Finally, press the two halves of the key fob together until you hear an audible click.
How can I reset the 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 key fob has to be reprogrammed by the dealership in order to work properly. It can be a costly and time-consuming process It's a good idea to know how to reset the system yourself.
Remove the battery from the system for 15 minutes. This will erase any residual electrical power in the on-board computer. Then, disconnect the LF -ECU and demand switch connectors. Check for continuity between the following terminals:
To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Leave the key in for about five seconds, then switch it off. The key information will now be saved to your car's computer and the new fob will be able to start your car in the future. You can program up to three fobs but you should only use one at a time. This will prevent unauthorized persons from copying your key and gaining access to your vehicle. You can purchase a new keyfob online, however it must be programmed and cut by an authorized dealer.