Changing the Battery in Your Mazda 3 Key Fob
It's frustrating to get into your car at the conclusion of a long and tiring day and discover that your key fob is dead. Luckily, it's an easy fix with a simple battery replacement from a hardware store or big box retailer.
Incorporating a spare key fob to your Mazda 3 can be an affordable solution to free yourself from the hassle of being transported to a dealership and having them re-program your keys.
Battery Replacement
Removing the battery from the Mazda 3 key fob is a simple process that you can do at home. But, 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."
You'll need to use a flathead screwdriver with tape and patience to open the case. Find a gap or notch in the bottom of the metal part of the Mazda 3's key fob, and then insert the head of the screwdriver in it to break off the lower portion. Repeat the process for the top part of the metal but be careful not to scratch the rubber ring at bottom of the key fob's case.
There's a slot on each side of the case that houses the battery. Start on the other side of the case, and then gently push it open. Remove the battery that was used and place in a new CR2025 ensure that it's face-up for proper orientation. Attach the cap to the battery again and secure both sides of your key fob case by pressing until they click.
After replacing the battery after replacing the battery, lock and unlock your doors to test that the fob works. If everything appears to be working, you can start using the Mazda 3's remote features for the first time!
Pairing Issues
If your key fob stops functioning suddenly, this could indicate that the transmitter in the car has been damaged. This is usually a matter to a professional and you will require a new key fob.
If you've tried to replace the battery and reprogram the key fob, but it's not working then the chip in the key fob could be defective. This can occur if the key fob has been dropped on hard surfaces and exposed to salt water, or even touched by dirty hands.
You'll need to locate the tiny "key", which is inserted into the seam, in order to remove the circuit board and diagnose the problem. You will then be able to check for any damage or corrosion on the electronic chip. To avoid damaging the chip, it is recommended to use a clean paper towel.
It is also possible to take a closer look at the battery connector's terminals to see if they are damaged or cracked. If this is the case, then carefully soldering them back in place can usually restore the function of the key fob. You can also inspect the buttons for wear or damage. If the buttons are loose, they can easily be soldered back in the event that the button has actually snapped off.
Interference Signals
There's nothing more frustrating than trying to get the engine started in your car only to see the message "No Fob Detected". It typically happens at most difficult times, such as when you're late for work or when you have to pick up children from daycare or school. There are several things you can do to troubleshoot and find out the root of the issue.
Interference signals can cause the remote key fob not to function in a proper manner. It can be caused by things like weather conditions, buildings, as well as transmitters operating on the same frequency. Interference can occur when your vehicle has aftermarket equipment that transmits at the same frequency as your key fob.
In addition, if your key fob is exposed to water or salt water it may be damaged. The rubber seals on the electronic chip can be penetrated by water, especially in the event that it is submerged for long periods of time like in a swimming pool or at the beach. This could cause the chip to stop functioning and require replacement of the key fob. If replacement key for mazda 2 have a programable key it is possible to clean the chip with isopropyl alcohol or an electronic cleaner to aid in its return to functionality. If this doesn't help then it's likely that the chip has burned out and will need to be replaced.
Locking and unlocking of the Doors
The buttons on the key fob transmit electronic signals to a solenoid within the car. It then transforms the signal into a mechanical action that locks and unlocks doors. If the door lock does not work it could be due to an issue with the solenoid. This requires expert auto repair shops to investigate.
A dead 12V battery can also hinder the fob from functioning properly. This could happen if the battery loses its charge or if your contacts get 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 replace the battery or re-program it, the issue might be in the receiver module. This device interprets radio frequency signals transmitted by the key fob to control the vehicle. If it malfunctions, it can be expensive to fix.
To determine if this is the case, begin by inserting your spare keys into the key slot and setting the ignition to ON. Press the key fob button three times within 10 seconds without taking it. The Mazda 3 system synchronizes the key to the vehicle and you can now use it as your primary driving remote. You can program up to three keys this manner.