Changing the Battery in Your Mazda 3 Key Fob
There is nothing more frustrating than getting in your car after a long work day and finding that the key fob battery is dead. This is a simple fix that is easily done at a major box retailer or at a hardware store.
The addition of a spare key fob to your Mazda 3 can be an affordable way to keep yourself from having to be transported to a dealership and having them reprogram your keys.
Battery Replacement
You can replace the battery on your Mazda 3 keyfob at home. However, you should only replace the battery when it is dead, or if the key fob displays a message in the multi-information display that reads, "Low key fob battery. Replace battery."
To open the key fob's case it requires a tape-wrapped flathead screwdriver as well as some patience. Find a gap or notch in the bottom of the metal part of your Mazda 3's key fob, and then insert the head of the screwdriver in it to cut off the lower part. Repeat this procedure for the top metal piece but be careful not to damage the rubber ring that is at the bottom of the key fob's case.
You'll find a slot on both sides of the fob case, which houses the battery. Make use of the tape-wrapped flathead screwdriver to gently the case open, beginning on one side before moving to the next. Remove the old CR2025 and replace it with a new one, making sure you put it on its face to ensure proper polarity. Finally, put the cap of the battery back on and then reattach both sides of the key fob case, pressing until you hear them click.
After replacing the battery after replacing the battery, lock and unlock your doors to test whether the fob works. If everything looks good, you can start using the Mazda 3's remote features in the road!
Pairing Issues
If your key fob stops functioning suddenly, this could indicate that the transmitter inside your car is damaged. It is typically a need for an expert to repair it and will likely require a new replacement key fob.
If you've tried to change the battery and reprogram the key fob, but it hasn't worked, the chip inside the key fob might be defective. This can happen if the keyfob was dropped or exposed to saltwater or handled by dirty fingers.
You will need to locate an extremely small "key" that is inserted into the seam to remove the circuit board to identify the problem. Then, you can examine the chip for corrosion or damage. It is recommended to use a clean paper towel to ensure that the chip is not damaged.
You can also examine the battery connector terminals to see if they are damaged or cracked. If this is the case, then carefully soldering them back in place will usually restore the function of the key fob. mazda bt50 key replacement can also inspect the buttons for wear or damage. If the buttons are loose, they can easily be soldered back in place as well unless the button is actually snapped off.
Interference Signals
Few things are more frustrating than staring at an "No Fob Detected" message when trying to start your vehicle. It typically happens at most unpopular time, such as when you're late for work or when you are picking up your children from school/daycare. The good thing is that there are a few steps you can take to investigate the issue and figure out what is causing it.
Interference signals can affect the remote key fob signal coming from the vehicle which causes it to not work properly. This could be caused by objects like weather conditions, buildings, and transmitters that use the same frequency. Interference can also occur when you have aftermarket equipment installed in the vehicle that transmits at the same frequency as the key fob.
In addition, if your key fob is exposed to salt or water it may be damaged. The rubber seals on the electronic chip may be damaged by water, especially if it is submerged for long periods of time like in a pool or ocean at the beach. This could cause the chip's function to cease, requiring replacement of the key fob. If you have a programable key, you can clean the chip with isopropyl Alcohol or an electronic cleaner to aid in its return to functionality. If this doesn't work, the chip is likely to be damaged and needs to be replaced.
Locking and unlocking of the Doors
The buttons on the key fob transmit electronic signals to the solenoid inside the car. It then converts that signal into mechanical action that locks and unlocks doors. If the door lock isn't working, the issue could be due to a solenoid problem that requires investigation by an expert repair shop for autos.
A dead 12 volt could also stop the fob from functioning effectively. This could happen if the battery is not charged or if your contacts become corrosion-prone. This problem can be fixed within a few minutes using a new battery.
If the key fob isn't working after you change the battery or try to program it again the problem could be with the receiver module. This device receives radio frequency signals from the key fob and interprets them into controlling the vehicle's functions. It could be a costly repair if it is damaged.
To determine whether this is the case, begin by inserting your spare key into the key slot and setting the ignition to ON. Press the key fob button twice in a matter of 10 seconds without removing it. The Mazda 3 system will now connect the key to the car and you can use it as your primary remote for driving. This allows you to program up to three keys.