Mazda 6 Key Fob: The Good, The Bad, And The Ugly
Changing the Battery in Your Mazda 3 Key Fob
It can be a bit frustrating to pull into your car at the end of a long day and find that the key fob is dead. Luckily, it's an easy fix by purchasing the simple replacement of a battery at an hardware store or a big box retailer.
A spare key fob to your Mazda 3 can be an affordable way to keep yourself from having to be driven to the dealership and having them reprogram your keys.
Battery Replacement
The battery replacement in the Mazda 3 key fob is an easy process that can perform at home. But, you should only replace the battery when it goes out of service, 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 case You'll need a tape wrapped flathead screwdriver as well as some patience. Find replacement mazda 2 key 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 pry off the lower half. Repeat the procedure for the top piece of metal but be careful not to scratch the rubber ring at the bottom of the case.
Once the fob's case is opened, you'll notice a slot on either side of the case that houses the battery. Use the tape-wrapped flathead screwdriver to gently pry the case open, starting on one side before shifting to the other. Remove the old CR2025 and replace it with a brand new one, making sure that you place it face-up to ensure proper the polarity. Put the cap of the battery on the other side and attach both sides of your key fob case by pressing until they click.
Now that you've replaced the battery Check the fob to make sure it functions by locking and unlocking your doors. If everything appears to be working, your Mazda 3 remote features can be used again.
Pairing Issues
If your key fob stops suddenly it could be a sign that the transmitter inside the car is damaged. This typically requires an expert to repair it and will likely need a new key fob.
If you have tried replacing the battery and reprogramming the key fob, but it isn't solving the issue it is possible the chip inside the key fob may be malfunctioning. This could be the case if the keyfob has been dropped, exposed to saltwater, or the touch of dirty fingers.
To identify the issue You will need to find a small "key" embedded in the fob's seam which allows you to take it apart and take out the circuit board. Then, you will be able to examine for any damage or corrosion on the chip. It is best to clean the paper towel to avoid damaging the microchip.
You may also inspect the battery connector's terminals to see if they are cracked or broken. If this is the case, then carefully attaching them back will usually restore the function of the key fob. It is also possible to check the buttons for damage or wear. If they are loose, they can be soldered back into place, unless one has physically snapped.
Interference Signals
There is nothing more frustrating than glancing at the "No Fob Detected" message when trying to start your vehicle. It usually happens at the most awkward times, such as when you are late for work or if you're picking up kids from daycare/school. The good thing is that there are steps you can take to investigate the issue and figure out what is causing it.
Interference signals can affect the remote key fob's signal from the vehicle and cause it to not function properly. This could be caused by objects such as weather conditions, buildings, and transmitters that use the same frequency. Interference could occur if your vehicle has aftermarket equipment that transmits at the same frequency as your key fob.
In addition, if your key fob is exposed to salt or waters, it could be damaged. The rubber seals on the chip's electronic components can be penetrated by water, especially when it is submerged over long periods of time such as in a swimming pool or at the beach. This can cause the chip to stop working and require replacement of the key fob. If you have a key which can be programmed to work, you can clean it using electronic cleaners or isopropyl to bring it back to its original functionality. If this does not work, the chip is likely to be damaged and will need to be replaced.
Locking/Unlocking of the Doors
The buttons on the key fob send electronic signals to the solenoid in the car, which converts this signal into mechanical action. This locks and unlocks doors. If your door lock doesn't work it could be because of an issue with the solenoid. This will require professional auto repair shops to investigate.
A dead 12 volt could also stop the fob from functioning properly. This could happen if the battery is not charged or if the contacts are corrosion-prone. This issue can be solved in just a few minutes by purchasing a new battery.
If the key fob doesn't work after you have changed the battery or re-program it the issue could be with the receiver module. This device interprets radio frequency signals transmitted by the key fob to control the vehicle. If it fails it could cost a lot to fix.
To determine whether this is the case, begin by putting your spare key into the key slot and turning the ignition to ON. Press the key fob two times within 10 seconds, but without removing it. The Mazda 3 system will now sync the key to the car and allow you to use it as your primary remote for driving. This lets you program up three keys.