How to Add, Change, and Reprogram a mazda 3 Lost key 3 Spare Key

It's a good idea to keep a spare key on hand in case you lose your keyfob or it stopped working. This article will tell you how to add, alter or reprogramme your Mazda 3 keyfobs.

Note: Some keys require programming by professional locksmiths, while others don't. Make sure you only use official Mazda replacements for your key fob.

How to Add a Spare Key

You can also add an additional key in case you don't have a spare key available or when you accidentally damage the one you already have. To do this, you'll need a small screwdriver with a flat head and a new CR2025 battery. Once you've got the tools, it's time to remove the key fob and change the battery. First look for the key release button for the auxiliary key. It's located under the metal component and is easy to find. The cover that covers the back should come off when you press the button. Then, you can insert the screwdriver head into the notch on top or the space and remove the metal part.

Insert your spare key or a new one into the slot following the removal of the accessory key. Set the ignition to ON and wait for about five seconds before setting 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 to your Mazda 3. You don't want to utilize more than two key fobs in order to start your vehicle. This is a safety measure designed to prevent unauthorized users, like valet drivers from activating your key and thereby starting your car.

How to Reprogram a Spare Key

It's smart to know how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from opening your car or stealing it. This procedure should work with any 2008 mazda 3 key fob but you'll need two working keys to start the reprogramming process. If you don't have the two working keys, you'll have to bring your vehicle to the dealership to have it done.

Start by stepping into the driver's position and close all the doors with the exception of the one that is open. Insert the first working key in the slot, and then set the ignition to ON. Wait five seconds before removing the key. Repeat the process with the second key.

Once you've completed programming your new key, you'll have 3 keys that start your car in the future. Test each key to be sure that they're operating correctly before placing them away.

It's a good idea buy an extra Mazda 3 key fob, particularly if you're a driver who frequently loses their key or has other issues with it. You can buy one online or at your local auto store. Make sure you go through reviews prior to purchasing to ensure that you don't purchase an item that isn't compatible with your vehicle.

How to change the Battery on a Spare Key

It's very frustrating to discover that the key fob you used to use has gone out and you're not able to unlock your vehicle. It's easy to replace 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 from the metal and reveal a slot on each side of the case. Press the flathead into one of these slots, and then gently pry the two halves of the case apart. Once the battery is fully exposed, take it out and place it in a safe place in a place where you will not forget it.

Before you begin, be sure that you have a new replacement battery. They can be bought at any store that sells batteries or from a Mazda dealer in Winter Garden. Using the correct type of battery will ensure that your key fob functions perfectly.

Then, place the new battery into place and replace the battery cap. Be careful not to scratch the small rubber ring that the battery sits on. The two halves should be pressed together until you hear the click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security measure. The car won't start if the key is lost or stolen, even if you've got a spare key fob. The key fob should be reset by the dealer to enable it to function again. It can be a stressful and costly experience. So, it's best to understand how you can reset the system.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electrical power in the on-board computer. Next, disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. The key should remain in the ignition for about five seconds and then switch it off. The key's information will be transferred to your vehicle's computer and the new fob will be able start your vehicle in the future. You can program up to three fobs however, you should only use one at each time. This will prevent unauthorised people from stealing your keys and gaining access to your vehicle. You can buy a new keyfob online, however it'll still need to be cut and programmed by an authorized dealer.