How Your Mazda’s Auxiliary Key Can Save You From a Sticky Situation

By Product Expert | Posted in Mazda Technology, Tips and Tricks on Tuesday, October 27th, 2015 at 5:48 pm
How to Unlock Your Mazda 3 With a Broken Key Fob

Your Mazda’s auxiliary key is a secondary way to unlock and enter your vehicle

How to Unlock Your Mazda 3 With a Broken Key Fob

Automotive technology can be great, with remote vehicle access having helped us unlock and lock our doors for years now. But what happens when the technology stops working? Like many technologies, the key fob on your Mazda can suffer from a dead battery and need to be replaced. So, what do you do in the meantime? We can show you how to easily unlock your Mazda 3 with a broken key fob.

Whether your key fob is damaged or just has a dying battery, there is a way for you to unlock your vehicle and start the car. Just follow the steps below:

  1. Press and hold the auxiliary key release button on the underside of the key fob. 
  2. Grab the looped end at the top of your key fob. 
  3. Pull out the auxiliary key. 
  4. Use the auxiliary key to unlock the driver’s side door. 

[Read more: What to do when you’re locked out of your car]

How to Start the Mazda 3 With a Broken or Dead Key

Now that you’ve managed to enter the vehicle with the auxiliary key, you’re going to need to know how to start your Mazda 3. At this point, the auxiliary key can be put back into the key fob, as the key fob can still be used to start your vehicle. This will only take a few extra steps.

  1. Make sure the shifter is in the Park (P) or Neutral (N) position. 
  2. Depress the brake pedal. 
  3. The light on the engine start button should flash green. 
  4. Take your key fob and touch the back of it to the push button start. 
  5. When the green light on the engine start button stops flashing and remains continuously illuminated, press the push button start normally to start the engine. 
  6. It is recommended you allow the vehicle to idle for about 10 seconds. 

Technology may be great, but it always helps to have a manual back up on hand. Thankfully, Mazda has you prepared for any situation. Now that you know how to unlock your Mazda 3 with a broken key fob, remember that it’s always a good idea to have an extra set of keys handy. Feel free to contact us with any questions.

[Read more: How to adjust the seats in your Mazda 3]

11 Responses to “How Your Mazda’s Auxiliary Key Can Save You From a Sticky Situation”

  1. Catherine says:

    This saved me! Thank you!!!

  2. Amber Cordoba says:

    Thank you for posting this! You just saved me an extreme amount of hassle!

  3. Mary Francis says:

    I am having trouble starting my CX3 Akari. There is no green light on the start button. I push it and nothing happens. Then all of a sudden the car will start. But still no green light. Also when a passenger opens the door a constant beeping emits and a red key symbol comes up on my dash. The car is not even 3 years old and I am not feeling the like for this car anymore. I have no other person to rely on if things go wrong. I need a reliable car.

  4. Hugh Van says:

    Thanks for the post, saves me a lot of time, I was thinking about calling Mazda (Australia) before seeing this post. Just a follow up question, I’ve just replace the battery on the fob two days ago and it’s been working, why does the key symbol flashing this morning and now not recognising my fob?

    Kind Regards

  5. Amanda says:

    Did you figure this out? I need to replace my key battery as well.

  6. Bob Smith says:

    I have working keyless start fob. How can I get a spare made and programmed and approx. cost, 2014 Mazda 3

  7. Amanda Vardy says:

    So I have a question what do you do in that situation when the key still doesn’t start your car. We changed the battery recently and our key fob wasn’t working and we followed all those instructions and the car still wouldn’t start in fact it told us we didn’t have a key

  8. Amanda vardy says:

    It’s 475.00 for a new fob and 150.00 to program it. Or at least that’s what Mazda in Hamilton Ontario tells us

  9. Yes! This works! I put the Mazda symbol on the fab to the push button on the dash and it work immediately!!!

  10. I had no idea that you could start a car with a dead key fob. My friend doesn’t have a manual key, so these tips could help her out. Thanks for the great tips on starting a car with a dead keyfob. Do you have any tips for getting a keyfob fixed our replaced?

  11. Lynda says:

    I have 2013 Mazda 3, and the buttons on both key fobs do not work. Require assistance or let me know if I need to go a Mazda dealership?

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