Mazda 2 Key Fob Replacement

While it is frustrating to have a fob stop working, it's fairly common and can be repaired. It is usually a simple issue of replacing the batteries.

Batteries can be found at most big-box retailers and hardware stores. You can also consult your owner's manual as well as on YouTube for instructions on how to open the fob and replace the battery.

What is a keyless system?

The keyless entry in your car is a remote-control system that lets you lock and unlock the vehicle without having to insert your keys. It's usually on an accessory key fob or incorporated into your ignition key handle. Certain models allow you to remotely secure the tailgate and trunk.

The system transmits radio signals to the computer in your car. The car is then able to determine whether it is the correct key. If it's the correct key then the doors will be opened automatically and the engine will start. The key fob in itself contains an integrated security chip, also known as a transponder, that stops the vehicle from starting if the incorrect key is used.

While keyless entry systems are convenient, they do have some drawbacks. They are prone to being accidentally activated by children playing with them or switched on when the owner isn't present in the vehicle. This could cause power windows and other features of the car to function without the owner’s consent or knowledge and can even set off the alarm.

There are a variety of ways for thieves to hack into the computer of your car to trick it into thinking that your key fob is close enough to be able to start your vehicle. It is crucial to always have a backup key or fob.

How do I change my keyless entry system?

It could be a huge issue if the key fob battery goes out while you're driving. Fortunately, replacing a Mazda 2 transponder flip key's battery is fairly easy. You will have to know the right method of opening the key fob, and which type of battery should purchase.

You'll want to use a tape-wrapped flathead screwdriver to pry open the case. Start with one side and then the other side, using it gently to avoid breaking it. After the case is opened, remove the old battery. Place the case somewhere so that it is not forgotten. Replace the battery, but be sure to align it so that the positive side is facing upwards.

It's also a good idea to note the code number on the reverse of your manual key, to allow you to program the replacement mazda key fob using it. While you can duplicate an old metal key in a hardware store, many of the newer smart keys require programming by a locksmith or dealer.

The cost of replacing a fob, programming and mechanical backup keys can be added to the total. If you have an auto club membership or insurance policy, check whether it will cover the cost. You might be able to save money by purchasing an aftermarket fob online and having it programmed by a locksmith, instead of the dealership.

How do I program my keyless entry system?

In general, the same procedure can be used to program a key fob for the majority of automobile models. The process for certain vehicles might be different and require special hardware or computer software. In these instances it is recommended to read the manual or contact an authorized dealer assistance.

Be sure to have the materials and tools you need before starting. It is recommended to read the manual for the keyless system to understand how it works. The installation is relatively easy but you'll have to remove the cover of your steering wheel for access to the wires necessary for the connection. Wrapping the wires with electrical tape will protect them and insulate them.

To program the new key fob, insert the original key into the ignition and then turn it to the "ON" position (not the start or run position). When the key in the ignition is switched on, simultaneously press and hold both the unlock and the lock button of your new remote for 30 minutes. If done correctly, your car will sound a bell and the programming process will be successful. After programming a new keyfob successfully, turn the ignition to "OFF" and test all buttons to confirm that they function.

How do I replace the battery in my keyless entry system?

Replace the batteries on your keyfob at least every couple of years or if you notice it's less responsive. This can be done within less than 10 seconds. Most times you don't have to reset your key fob after replacing the battery.

You'll need to make sure you have the correct battery in your inventory. The type of battery should be noted on the key fob if you flip it over. If it's not legible then you can make use of a small flat head screw driver to open the key fob and examine inside. Key fobs usually use the CR-1620 battery that is easily available at a variety of stores, including Home Depot Walmart & AutoZone.

It is easy to unlock the key fob by taking out the mechanical key. Make use of a flathead screwdriver or your fingernail to accomplish this. Then, take out the battery that was in use, and replace it with the new one you purchased earlier. The positive (+) side of the new battery must be facing up. Reassemble the two sides and snap it shut.

Certain keys require programming and can only be accomplished using a specific tool that an automotive locksmith or dealer has access to. Non-transponder keys do not require programming, therefore they can be a viable option for those without the tools to program their car.