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

It's a good idea to keep an extra key in your pocket, whether you dropped your keyfob, or it was unable to function. This article will cover everything you should be aware of when changing, adding, and changing the programming of your Mazda 3 key fobs.

A word of warning: some keys require programming by a professional locksmith or dealer, while other keys don't. Be sure to only make use of official Mazda replacements for your key fob.

How do you add a spare key

If you're not lucky enough to receive a spare keys from the dealership when you buy your Mazda 3 or accidentally break your current key do not fret -- there's still an option to make another key. To do this, you'll need a small flathead screwdriver and the new CR2025 batteries. Once you have the items then it's time to open the key fob. First, locate the auxiliary key release button. It's located on the underside of the metal part and is easy to find. The back cover should come off when you press the button. Then, you can insert the head of the screwdriver into the notch or the space on the top of the metal component and pry it off.

Once the auxiliary key is removed, insert the new or spare key into the slot. Set the ignition ON and wait for 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 into your Mazda 3. The last thing you want is to have more than two working key fobs and not be in a position to get your vehicle started. This is a precautionary measure to prevent unauthorized users from activating your keys and starting your car.

How to Reprogram a Spare Key

If you have a spare key it's a good idea to know how to reprogram it in case the original key you had is stolen or lost. This will stop unauthorised people from starting your vehicle or taking it. This will work with any Mazda. You will need two keys that are functioning for the reprogramming to begin. If you don't own two keys that function, you should take your Mazda to a dealer to get this done.

Start by stepping into the driver's seat and shutting all doors, with the exception of the one that is open. Insert the first working key in the slot, then set the ignition to ON. Then wait five seconds before taking out the key. Repeat with the second key.

After programming your new key, you should have three keys that start your vehicle in the future. Before saving each key, be sure it's functioning correctly.

It's a good idea to purchase a spare Mazda 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. You can find one online or at your local automobile store, but be sure to read the reviews prior to purchasing so you aren't buying one that's not compatible with your vehicle.

How do you change the battery on a spare key?

It's depressing to find out that your key fob has failed and you're in a position to not unlock your vehicle. Fortunately, it's easy to replace the battery and save yourself some cash at the dealership.

Press the auxiliary key button located at the back of the keyfob. This will remove the key auxiliary to reveal an opening on both sides of the case. Press the flathead screwdriver into one of these slots, and gently remove the two halves of the case. When the battery is fully exposed, remove the case and put it somewhere you will not forget about it.

Be sure to have a replacement mazda key battery prior to starting. They can be found at any store that sells batteries or at a Mazda dealer close to Winter Garden. Using the right type of battery will ensure that your key fob works properly.

Replace the cap of the battery and then insert the new battery. Be careful not to scratch the small rubber ring the battery is placed on. Press the two halves together until you can hear the click.

How do I reset the Keyless Entry System

The mazda 3 key fob (more about Web 011 Dmonster) is not just a practical feature. It's also a security measure. The car will not start if the key is lost or stolen, even if you've got a spare fob. This is because the fob that you have to be reset at the dealership in order to work once more. This could be a costly and frustrating experience therefore it's a great idea to understand how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any residual electric current from the onboard computer. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Verify the continuity between the next terminals.

To program a new key or a spare, place it in the slot and turn the ignition to ON. Switch off the ignition after approximately five minutes. The information from the key will be added to your vehicle's computer, and the new fob will be able to start your vehicle in the future. You can program up to three fobs but you must only use one at a time. This will keep unauthorised individuals from stealing your key and gaining access to your vehicle. You can purchase a replacement keyfob online, but it must be programmed and cut by an authorized dealer.