Mazda Dealership Key Replacement
Mazdas come with special key fobs that have a unique code to help keep cars from being stolen. These fobs are not inexpensive and may cost $150 or more each to replace at a dealership.
Before having your keys replaced ensure that you have a spare battery. To do this, carefully take off the battery cover on the key fob. Then, place the new battery on the positive side (+) facing upwards.
Cost
If you damage or lose your Mazda car key, you can get it replaced at the dealership. The cost of obtaining them from a locksmith or independent auto dealer may be much more costly. The cost of the replacement key is determined by several factors. The cost of the replacement key is determined by a variety of variables. Then, you'll have to determine if the keys are missing or stolen.
Depending on your situation, you may be able to avoid the expense of a brand new Mazda dealership key by removing the battery from the fob and replacing it yourself. A replacement battery is available at a hardware shop or online for around $10. It's also easy to swap the old battery. If you own a Mazda equipped with a proximity-key, the process could be more expensive.
If you have an 09 R3, for example you can buy an prox with no keys that can hold two keys. This is much less expensive than having the dealer program a new key. Another advantage of this method is that it's much easier to use than a traditional fob. The only drawback is that you need to have a working key or at the very least a proxy card in order to program it.

Time is a factor.
You can get a replacement Mazda car key at your local Mazda dealership if lost or stolen one. They typically have blank chip keys that can be programmed available and can create an effective replacement for you. If they don't have a key in stock, you could be waiting a few days for it to be ordered. This could cost you $200-$250.
You can also engage an auto locksmith to design an alternative key for your Mazda. They will charge less than dealers and usually make a copy of the original on-site. It is essential to determine whether your car requires key programming. Some Mazda models come with key fobs and remotes that require a specific computer chip which can only be programmed by a certified dealer or locksmith.
Mazda continues to develop innovative and intuitive technology for their vehicles, including the key fob. This handy device allows you to start your car or access it by pressing of a key. If it dies on you in Stroudsburg or Easton you'll need to know how to access the Mazda keyfob to replace the battery.
First take the metal auxiliary key from the Mazda key fob case. You'll notice two slots on each side of the case. Be careful not to crack or snap the case when you pry it open using a tape-wrapped screwdriver. Then, remove the old battery and replace it with a new one, making sure that the positive (+) side of the battery is facing up.
Safety
Mazda key fobs appear like they're simple on the surface however, they're actually intricate pieces of electronic circuitry. They're equipped with a transponder chip and are programmable for your specific car model to guard against theft. You can have a new key made at the dealership when you've lost it or need one. The dealer will duplicate your current key while you wait and program it. The key can also be used with a different vehicle, provided the ID and the part numbers are identical.
Before you begin the replacement process, it's essential to know that the process is not without risk. The first step is to take off the auxiliary key in metal button that is located on the back of the fob case. After removing the auxiliary key button made of metal there will be a slot on either side of the case. The slots are large enough for you to use a tape-wrapped flathead screwdriver break open the case. Once you're done, make sure you put the case in a safe place.
After mazda key programming 've removed it from the cap, you can replace it with a replacement. Choose a replacement battery that is the same size and type as the original one to ensure that your key fob is functioning correctly. Place the new battery inside the key fob with the positive (+ side) facing up. After you've done this and replaced the fob cover and battery cover press until you hear an erupting sound.
The availability
Mazda keys may appear simple, but they are actually microchips that help protect your vehicle from theft. It is therefore expensive to replace them if damaged or lost. However, a locksmith might be able help you save money by cutting and programming an extra key. They're also more flexible than dealers as you can access locksmith services at any time of day or at night.
If your Mazda key fob begins acting up it's a good idea to replace the battery before it is completely dead. You won't be without an automobile key. The battery can be changed in a matter of minutes however, you'll need to take the key fob apart for this procedure. This can be accomplished by removing the plastic cover with a screwdriver and using the corners provided to pull it off. Next, remove the battery that was used and put it back in with its positive side facing up. Make sure to replace it with a rubber ring, and then reassemble your fob in the correct way.
You can also get in touch with an auto locksmith in your area to cut and program the new key for your Mazda. However this method is less reliable and could result in a damaged key. To find the right key, the locksmith in your vehicle will need your VIN number along with other details regarding your vehicle.