The flashing light indicates the immobilizer system is active and is normal behavior. For some reason, for the past three months, I hadn't noticed the blinking light. In my last few cars, there was an alarm light either on top of the dash or on the ends of the door lock buttons that flashed when the alarm was activated.
Our CX-30 reported to us that our key fob battery was low, so I decided to make a quick guide to show you guys how to replace the Mazda key fob battery. Hope
Replace the battery. If the button cell battery in the key fob of Mazda3 is replaced incorrectly or a battery is unsuitable, it can damage the vehicle key. Only replace drained batteries with new batteries in the same voltage, size, and specification. Make sure the battery is facing in the right direction when inserting it.

How to disassemble and replace the battery on a Mazda key fob. A battery replacement is required when you find the range becoming shorter on your remote, you

Next, if you know the battery is in good shape and has plenty of juice, the next issue could be that the brake switch sensor is bad. These are known to be problematic on these 2014-2015 Mazdas. If this sensor is shot, you will not be able to start the car as it won't recognize that you are stepping on the brake pedal.
⁠⁠⁠⁠⁠⁠⁠ If you own a 2018 Mazda 3, you may have experienced an issue with your key fob not working. This can be an annoying and inconvenient problem that can prevent you from accessing your car or locking it securely. Fortunately, there are a few steps that you can take to help troubleshoot the issue - ⁠⁠⁠⁠⁠⁠⁠ If you own a 2018 Mazda 3, you may have experienced an
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    • mazda 3 2015 car key battery