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

It's a good idea always to have an extra key on hand, whether you dropped your keyfob, or it has stopped working. This article will tell you how to add, alter or reprogramme the Mazda 3 keyfobs.

A word of caution Certain keys require programming by a locksmith professional or dealer, whereas other keys do not. Use only authentic Mazda replacements to replace your key fob.

How to Add a Spare Key

You can also add a second key if you don't have a spare key, or if you accidentally break the one you already have. You'll need the flathead screwdriver, as well as the CR2025 replacement battery. Once you've got these tools and are ready to remove the key fob to change the battery. Find the key release auxiliary. It's located under the metal part and is easy to find. The cover that covers the back should come off as soon as you press the button. Then, put the screwdriver's head in the notch at the top or in the space, and take the metal part away.

After the auxiliary keys are removed, insert the new or spare key into the slot. Switch the ignition on and wait for approximately five seconds, then turn it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to keep in mind that you can only program up to three keys on your Mazda 3. The last thing you want is to have more than two working key fobs and not being in a position to get your vehicle started. This is a safeguard to prevent unauthorized users from activating your keys and launching your vehicle.

How to Reprogram a Spare Key

It's a good idea to be aware of how to reprogram a spare key in the event that your original key gets lost or stolen. This will stop unauthorised people from starting your vehicle or taking it. This should work with any Mazda. You'll require two keys that are functioning for the reprogramming to begin. If you don't have the two working keys, you'll have to take your vehicle to a dealership to complete the process.

Start by stepping into driver's seat, close all the doors with the exception of the one that is open. Turn the ignition on and insert the first working key. After five seconds, remove the key. Repeat with the second key.

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

It's a good idea to buy a spare Mazda 3 key fob, especially if your car is one who has a tendency to lose their keys or has other issues with it. You can purchase one on the internet or at a local automotive store. Make sure to review the reviews before buying to ensure you don't buy an item that isn't compatible with your vehicle.

How to Change the Battery on a spare key

It's a nightmare to discover that your key fob has died, and you are unable to unlock your vehicle. It's easy to change the battery yourself and save money at the dealership.

Press the auxiliary key button located at the back of the keyfob. This will release the metal key that is used as an auxiliary key, and expose two slots on the sides of the case. Put the flathead into one of these slots and gently pry the two halves apart. Once the battery is fully exposed, take it out of the case and place it somewhere you will not forget it.

Be sure to bring a new battery ready before you begin. These batteries can be purchased at any retailer that sells batteries or from a mazda 6 key fob (Going On this page) dealer in Winter Garden. The right kind of battery is crucial to make sure that your keyfob functions properly.

Replace the cap on the battery, and then install the new battery. Be careful not damage the rubber ring that holds the battery. Then, press the two halves of the key fob together until you hear the sound of a click.

How do I reset the system's Keyless Entry System

The key fob on your Mazda 3 is not only an extra convenience, but also an important security feature. The car won't start if the key is stolen or lost even if you have a spare fob. The key fob must be reprogrammed by a dealer to make it work again. This can be a costly and stressful experience It's a good idea to learn how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will eliminate any residual power from the on-board computer. Next, disconnect both the LF-ECU connector as well as the demand switch connectors. Check continuity between the following terminals.

Place the key into the slot, and switch on the ignition. Stop the ignition after about five seconds. The key's information is transferred to the computer of your vehicle and the new fob will start your vehicle. You can program any number of fobs you would like however only one must be used at any given time. This will stop unauthorised people from copying your key and getting ahold of your car. You can purchase a replacement key fob online, however you'll need to visit a dealer or locksmith to have it cut and programmed.