Mazda Dealership Key Replacement
Mazdas come with unique key fobs, which have a unique code that can help prevent car theft. These fobs are not cheap and may cost you $150 or more per one to replace at a dealer.
Make sure you have a spare set of keys that works before you replace yours. To accomplish this, carefully take off the battery cover from the case for your key fob. Place the new battery so that the positive (+) side is facing upwards.
Cost
If you're worried about losing or damage to your Mazda car keys you can always get them replaced at an auto dealer. The cost of obtaining them from a locksmith or independent auto dealer may be much higher. The cost of keys replacement is determined by a number of factors. First, the kind of vehicle you are driving will affect the price. Then, you'll have to decide if your keys are lost or stolen.
Based on your specific situation You may be able to avoid the cost of a new Mazda dealership key by taking the battery out of the fob and replacing it yourself. A replacement battery can be bought in a hardware store or online for around $10. It's also easy to replace the old one. However, if you've got an older Mazda equipped with a proximity button this procedure could be more expensive.
For example, if you have an 09 R3 you can purchase an prox card without keys that can hold two keys. This option is much cheaper than having a dealer program an entirely new key. This option is also easier to use than the standard fob. It's only downside is that you need an operating key, or a an prox card to program it.
Time is a major factor.
When you need to replace a lost or stolen Mazda car key, you can have it made at your local dealership. They usually have blank chip keys that can be programmed available and will create a working replacement for you. You might be waiting for some time if they don't have one in stock. This could cost you $200-$250.

You can also engage a locksmith to make an alternative key for your Mazda. They will charge less than dealers and often make a working copy on-site. But, it is essential to determine if your car requires key programming. Certain Mazda models have key fobs and remotes that require an exact computer chip that can only be programmed by a licensed locksmith or dealer.
Mazda continues to develop innovative tech that is intuitive and easy to use for its vehicles. This includes the key fob. This useful piece of equipment lets you start your car or access it by pressing of a key. But if it should go out of commission while you're out and about in Stroudsburg, Easton, or Brodheadsville, you'll need to be aware of how to open the Mazda key fob to replace its battery.
First remove the auxiliary key from the back of the Mazda key fob case. There will be two slots on each side of the case. Be careful not to break or snap the case while prying it open with a tape-wrapped screwdriver. Remove replace mazda key that was in use and replace it with a new one, making sure the positive (+) side of the battery is facing up.
Safety
Mazda key fobs may look simple, but they are actually intricate electronic circuits. They have a transponder chip and are programmed to the particular car model you have to guard against theft. If you've lost your keys, or require a replacement one, you can go to the dealership and have one made. The dealer can duplicate your key while you wait and then program it. The key may also work on a different vehicle, if the ID and part number match.
It is important to know that this process is not risk-free. First, you'll need to remove the auxiliary button made of metal from the back of the case. Once you do this you will notice slots on both sides of the case. These slots are big enough to let you use a taped flathead screwdriver to push the case open. Place the case in a secure place after you've completed.
After you've removed it from the cap and replaced it with a replacement. Select a battery that is that is the same type and size as the original one to ensure that your key fob functions correctly. Then, put the new battery inside the key fob case, keeping the positive (+) side facing up. Replace the battery cover, and then the fob case by pressing down until you hear a snapping noise.
Availability
Mazda keys may look simple, but they're actually microchips that protect your vehicle from theft. It's expensive to replace them if lost or broken. A locksmith can help you save money when they cut and program an additional key. You can also get them faster than dealerships because you can do it any time.
If your Mazda key fob begins being unresponsive, it's an ideal idea to replace its battery before it completely dies. You won't need to be without the car key. The battery can be changed in a matter of minutes however you'll need dismantle the key fob to do it. This can be accomplished by taking off the plastic cover using a screwdriver and using the corners provided to break it out. Then, take out the old battery and place in the new one with its positive side facing upwards. Make sure you replace the rubber ring, and then reassemble your fob in the correct way.
You can also call a locksmith in your area to program and cut a new Mazda key. However this method is not as efficient and could cause a malfunctioning key. The locksmith for your car will require the VIN number as well as other information about your vehicle in order to identify the correct key.