How to Add, Change, and Reprogram a Mazda 3 Spare Key
It's a good idea to keep an extra key on hand regardless of whether you lost the keyfob or it has stopped working. This article will go over everything you need to know about adding, changing, and changing your Mazda 3 key fobs.
Note: Some keys require programming by an expert locksmith, while others don't. Use only authentic Mazda replacements to replace your key fob.
How to add a spare key
You can also add an additional key if you don't have a spare key or when you accidentally damage your current one. To do this, you'll need a small flathead screwdriver and the new CR2025 batteries. Once you've got these items and tools, you're ready to open the key fob. Find the auxiliary key release. It's located under the metal part and is easy to find. When you hit the button, the cover will fall off instantly. Then, insert the head of the screwdriver into the notch or space at the top of the metal part and pull it off.
Insert your new or spare key into the slot after you have removed the additional key. Set the ignition to ON, and wait for five seconds before setting it to off. This will register the new key's details to the system and allow it to start your vehicle in the future.
You can only program three keys to your Mazda 3. The one thing you don't want is to have more than two functioning key fobs, and not be in a position to get your car started. This is a safeguard to stop unauthorised users from activating your key fobs and starting your vehicle.
How do I reprogram a spare key
It's smart to be aware of how to reprogram an extra key in the event that your original key gets lost or stolen. This will keep unauthorized people from stealing your car and starting it. This process should work on any Mazda, though you'll need two working keys to start the reprogramming. If you don't have two working keys it's recommended to take your Mazda to the dealer to have this done.
Begin by stepping into your driver's seat and closing the door, except for the one that's opened. Turn the ignition on and insert the first working key. After five seconds, remove the key. Repeat with the second key.
Once you've programmed your new key, you should have three working keys that you can use to start your vehicle in the future. Test each key to ensure sure they're working correctly before taking them off.
You should think about purchasing a spare Mazda 3 remote, especially when your car is susceptible to problems. You can purchase one online or in your local auto store. Make sure you go through reviews prior to purchasing to ensure you don't buy a key fob which isn't compatible with your car.
How to change the Battery on a Spare Key
There's nothing more frustrating than finding that the battery for your key fob has died and you can't unlock your car. It's not a problem to replace the battery and save yourself some cash at the dealership.
The first step is to press the auxiliary key button on the back of the key fob. This will release the key from the metal and reveal two slots on the opposite side of the case. Press the flathead screwdriver into one of these slots and then gently pry apart the two halves of the case. Once the battery is fully exposed, take it out and set aside the case somewhere you won't forget it.
Be sure to have a new battery ready before you begin. They can be bought at any store that sells batteries or from a Mazda dealer in Winter Garden. The correct type of battery is crucial to ensure that your keyfob is working correctly.
Replace the cap on the battery, and then replace the battery. Be careful not to damage the small rubber ring that the battery rests on. Then press the two halves of the key fob together until you hear the sound of a click.
How to Reset the Keyless Entry System
The Mazda 3 key fob is not just a convenience. It's also an element of security. If you lose your key or had it stolen the car won't start even if it has the spare key fob. This is because the key fob needs to be reprogrammed at the dealership to function properly. It's a difficult and costly experience. Therefore, it's recommended to know how to reset the system.
Disconnect the battery from the system for 15 minutes. This will eliminate any residual power from the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Verify that mazda key fob are in good order between the terminals.
To program a new key, or a spare, insert it into the slot and set the ignition to ON. Put the key in for about five seconds and then switch it off. The key's information will be added to the vehicle's computer and the new fob will be able to start your car in the future. You can program as many fobs you want, but only one should be utilized at any certain time. This will stop unauthorised people from copying your key and gaining access to your car. You can purchase a replacement key fob on the internet, but you'll still need to go to a dealer or locksmith to cut it and programmed.