How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the ground or it just stopped working, it's always recommended to keep an extra key in your pocket. This article will provide everything you should learn about adding, changing, and reprogramming your Mazda 3 key fobs.

Be aware that some keys require programming by professional locksmiths, while others do not. Make sure you only use genuine Mazda replacements for your key fob.

how do i get a replacement mazda key do I add an extra key

If you're unable to get a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current key but don't worry, there's still an option to get another key. To accomplish this, you'll require a small flathead screwdriver and an updated CR2025 battery. Once you've got all the equipment, it is time to open the key fob. First, locate the auxiliary key release button. It's located under the metal component and is easy to find. Once you hit the button, the back cover should fall off right away. Then, put the screwdriver's head into the notch at the top or the space, and pry the metal part off.

After the auxiliary keys are removed, insert your new or spare key into the slot. Turn on the ignition and [Redirect Only] wait for 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.

It is important to remember that you can only program up to three keys for your Mazda Premacy key 3. The most important thing is to have more than two working key fobs and not being in a position to get your car started. This is a precautionary measure to stop anyone who is not authorized from activating your keys and then starting your car.

How to Reprogram a Spare Key

If you have a spare key it's best to know how to program it if your original key is stolen or lost. This will stop unauthorized persons from starting your car or taking it. This method should work on any mazda 3 replacement key fob however, you'll require two keys working to begin the process of reprogramming. If you don't have two keys that function it's recommended to take your vehicle to a dealer to have this completed.

Begin by stepping into your driver's seat, and closing the door, except for the one that's already opened. Place the working key in the slot, and then set the ignition to ON. For five seconds, remove the key and repeat the process with the second key.

After you've completed programming your new key, you should have three keys that you can use to start your car in the future. Before storing each key, make sure it's functioning correctly.

It's a good idea buy an extra Mazda 3 key fob, particularly if you're a driverystem for 15 minutes. This will clear any residual electrical current from the computer on board. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the following terminals:

Place the key into the slot, then turn the ignition ON. Turn off the ignition after approximately five minutes. The key's information is stored in the car's computer and the new fob is able to start your car. You can program up to three fobs, however, you should only use one at one time. This will stop unauthorized individuals from stealing your key and gaining access to your car. You can purchase a replacement keyfob online, but it'll still need to be cut and programmed by a dealer.