Changing the Battery in Your Mazda 3 Key Fob
There's nothing more frustrating than returning to your vehicle after a long and tiring day and realizing that the key fob battery is dead. Luckily, mazda replacement keys to fix it with the simple replacement of a battery at the hardware store or big box retailer.
Incorporating a spare key fob to your Mazda 3 can be an cost-effective way to stay away from the hassle of being driven to the dealership and having them reprogram your keys.
Battery Replacement
You can replace the battery on your Mazda 3 keyfob at home. It is recommended to replace it when the battery goes out or if you see a message reading "Low keyfob battery" on the multi-information display. Replace battery."
You'll need a flathead screwdriver, tape and patience to open the case. Find a gap or notch in the bottom metal part of your Mazda 3's key fob and insert the head of the screwdriver in it to remove the lower part. Repeat the procedure for the top metal piece but be careful not to scratch the rubber ring on the bottom of the case.
Once the fob's case is open, you'll find the slots on either side of the case that houses the battery. Use the flathead screwdriver with tape to gently pry open the case, beginning on one side before moving to the next. Remove the battery that was used and place in a new CR2025 to ensure that it's in the right orientation for proper orientation. Install the cap on the battery again, and then attach both sides of your key fob case by pressing until they click.
After replacing the battery, lock and unlock your doors to test whether the fob works. If everything is in order, your Mazda 3 remote features can be used again.
Pairing Issues
If your key fob has stopped functioning suddenly it could be a sign that the transmitter inside your car is damaged. It is usually a job to a professional and you require a new key fob.
If you've tried replacing the battery and reprogram the key fob but it's not working the chip inside the key fob might be defective. This could happen if the key fob has been dropped on hard surfaces or exposed to salt water, or even touched by dirty hands.
To identify the issue You will need to locate a small "key" that is embedded into the edge of the fob which allows you to take it apart and remove the circuit board. Then, you will be able check for any corrosion or damage on the electronic chip. To prevent damaging the chip, it is recommended to clean the chip with a new paper towel.
It is also possible to examine the battery connector terminals to see if they are cracked or broken. If this is the case, carefully connecting them back can generally restore the functionality of the key fob. Additionally, you can look at the buttons to see if they are worn or damaged. If the buttons are loose, they can be soldered back as well unless the button is actually snapped off.
Interference Signals
Few things are more annoying than glancing at an "No Fob Detected" message when trying to start your car. This usually occurs at the most unpopular moments, such as when you are late for work or if you're picking up kids from school/daycare. The good news is that there are steps you can take to troubleshoot the issue and figure out the root of the problem.
Interference signals can cause the remote key fob to stop working in a proper manner. This can be caused from things like weather conditions, buildings, and transmitters that operate on the same frequency. Interference may also occur if you install aftermarket equipment in the vehicle that transmits on the same frequency as the key fob.
Additionally, if the key fob is exposed to salt or water it may be damaged. Water can penetrate the rubber seals of the electronic chip particularly when the key fob has been submerged in water for a lengthy period of time. The chip could stop working and require replacement of the keyfob. If you have a programmeable key, you can clean the chip with isopropyl Alcohol or an electronic cleaner to aid in its get back to its original functionality. If this does not help, the chip is likely fried and will need to be replaced.
Locking or Unlocking the Doors
The buttons on the fob's key send electronic signals to the solenoid inside the car, which then transforms this signal into a mechanical action. It locks and unlocks doors. If the door lock doesn't work it could be because of an issue with the solenoid. This will require experts from auto repair shops to examine.
A dead 12 volt could also prevent the fob from working properly. This is the case if the battery's charge is lost, or if the contacts become corroded and stop conducting electricity. The good news is that a new battery is able to solve this issue in only minutes.
The receiver module could be the cause of the issue if the key fob does not function after replacing the battery or re-program the device. The device receives radio frequency signals from the key fob and interprets them into controlling the vehicle's functions. If it fails it could be costly to repair.
To determine if this is correct, place your spare key into the key slot. Then turn the ignition on. Press the key fob twice within 10 seconds, but without taking it out. The Mazda 3 system will now be able to synchronize the key with your vehicle and you can then use it as your primary remote for driving. You can program up to three keys in this way.