Battery For Mazda 3 Key Fob

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Don’t Leave The Car For Too Long

Mazda 3 Smart Key Fob Battery Replacement – DIY

Allowing the car to sit in one place for too long can cause the battery to develop deposits that weaken it and shorten its lifespan. If you have the option, you can run your engine for a few minutes every few days, even if you don’t need to take it anywhere.

If you need to travel or go on vacation, you should disconnect your battery from the car and store it in a cool, dry location. This prevents the battery from draining and keeps it in good health until you return.

Low Battery In The Car

The most common cause of the push button start malfunction is a dying or drained battery. When the system voltage in the car is too low, it can result in different error messages. When the battery is too low, the engine won’t crank. The push button malfunction warning will appear as a result.

This commonly occurs in the Mazda 3 when the car has been left without running for too long. The car has a sensor that detects the key fob. When the key fob is stored near the car, they will continue to communicate with each other, which drains the battery. Normally this doesn’t cause any problems, but if the battery is weak, or the car is left without being driven for too long, this can cause the battery to die.

How To Replace Your Car’s Key Fob

Getting another high-tech key fob can be a pricey proposition

The days of replacing a car key by having an inexpensive blank copied and cut at a hardware store are pretty much over. Most new cars today come either with a push-button start system or keyless entryor both. These modern key fobs add conveniences, but replacing them if they get lost or broken can be expensive.

To better understand the steps needed to replace a key foband the costswe set out to buy and program several of them. Along the way we learned several valuable lessons that can help you save money and time.

First off, before paying for a new key fob, check your cars basic warranty, insurance, or roadside assistance coverage to see if they cover lost or damaged keys. Also, some extended warranties and new-car dealers offer key-fob insurance.

Read Also: Replacement Battery For Bmw Key Fob

How Do You Diagnose Push Button Start Malfunction

When the message appears, the dashboard will also instruct you to have the vehicle inspected. If you know the causes of the problem, and how to diagnose it, then you’ll be able to handle that step yourself.

Let’s look at how to diagnose the common problems that cause the push button start malfunction in the Mazda 3.

Mazda 3 Key Fob Basics

Mazda 3 Key Fob Battery

unlocking doors to signaling for help in an emergency.

  • Lock: if you press this button once, the doors, liftgate, and fuel-filler lid will all lock. The hazard lights will flash once to confirm youâve locked up, but you can double-check by clicking âlockâ a second time and waiting for the beep.
  • Unlock: press once to unlock the driverâs door and fuel-filler lid and twice to unlock the other doors and liftgate.
  • Trunk button: the trunk button has a small icon of an open trunk. Hold this button down until the trunk opens.
  • Panic button: to set off the vehicleâs alarm system, hold down the panic button. To turn it off, just press any other button on your fob.

If you leave your key fob in your car, these functions will be suspended to protect your vehicle from theft.

Read Also: Best Car Battery For The Money

How To Change Battery In Mazda Key Fob

Similarly, What kind of battery does a Mazda key fob take?

CR2025 rechargeable battery

Also, it is asked, How do you change the battery in a 2018 Mazda key fob?

Remove the lid by twisting the flathead screwdriver in the arrows direction. Remove the battery, then the battery cover. Take care not to scratch or damage the rubber ring indicated in the illustration. Replace the rubber ring if it comes loose before installing a new battery.

Secondly, How do you open a Mazda key fob?

Getting Access to Your Mazda Key Fob To remove the metal auxiliary key, press the auxiliary key button on the rear of the key fob. After removing the metal key, youll see a slot on either side of the key fob casing. Gently pry apart the casing one side at a time with the tape-wrapped flathead screwdriver.

Also, Can you start a Mazda without the fob?

If you wish to start your car when your key fob dies, follow these steps: Look for a little latch on the back of the key as you turn it over. Release the lock and pull down on it to reveal a standard key hidden within the fob. Manually open the door by inserting the key into the drivers side keyhole.

People also ask, How do you open a Mazda 2018 key fob?

Related Questions and Answers

S To Do If Key Fob Of Your Mazda Vehicle Dies

Car key fobs are used in our everyday lives, so people dont realize how helpless they will become if it stop working suddenly. It can be frustrating for you, but the automaker has thought about it, and there is a solution. If you are a Mazda driver and want to know how to get the Mazda vehicle started after the key fob dies, we will help you out. At Tuttle-Click Mazda in Irvine, CA, we will answer your question. Continue reading to know more.

Follow these steps if you want to start your vehicle after the key fob dies:

  • Turn the key over and look for a small latch on the back.
  • Release and pull down on the latch to find a traditional key that will come out from inside the fob.
  • Insert the key in the drivers side keyhole and manually unlock the door.
  • Push down the vehicles brake and look for the Mazda symbol near the top of your fob and press it against the push-button start. A small chip inside the fob will then be connected to the car, and the engine will be started.

You can continue to manually unlock or lock your vehicle without the key fob and start the engine with the process explained above, but it would be more convenient to do it with the key fob. It will save your time as well.

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Replace Mazda Key Fob Battery


Learn how to replace the Mazda key fob battery. Below you will find several videos that show how to replace the battery in several Mazda key fob batteries.

If your Mazda key fob battery is dead, you can still open the vehicle manually and start the vehicle.

What you will need

  • CR2032 3-Volt Lithium Coin Cell Battery, Most Common.
  • CR2025 Does not fit all in one Combo Key/Remote


  • Remove the metal key from the Mazda key fob.
  • You should see two slots where you will need to insert the flat screwdriver. Once you insert the screwdriver in this slot, twist it slightly, and the shell will open. Do the same for the other side.
  • Next, you will notice that only part of the shell is separated. Insert the screwdriver on the edge of the shell and twist it again. This should open the shell completely. Place the back Mazda key fob case aside.
  • Remove the key fob battery cover from your Mazda remote.
  • Pull out the dead key fob battery from the Mazda keyless remote.
  • Insert the new battery. Make sure the positive symbol is facing you.
  • The positive is on top, while the negative side of the button cell battery faces the key fob.
  • Insert the O-ring in its channel if it came off during the earlier step when you removed the battery from the Mazda remote.
  • Press the battery cover in place
  • Press the two key fob cases together until you hear the shells click and lock in place.
  • Check the side of the key shell to make sure it is fully closed.
  • Press the metal into the Mazda key.
  • Mazda Key Fob Battery Replacement In Fort Lauderdale Fl

    How To : Mazda 3 key fob battery replacement

    A Mazda key fob battery that is faulty can be annoying. If you would like some assistance from local car experts that know each and every inch of every Mazda model, come on down! Youre in the right place. Well take care of any and all mishaps in association with your Mazda key fob battery and get you moving onto the next task in no time.

    Our team will step up to the plate if you need to as well. There are no parts left behind in our parts archive. If it goes in or on your Mazda model, well get it for you.

    Our Mazda key fob battery service is just another way we support and say thank you to all of those in our area that have chosen to become a part of our Mazda cars family. Were proud to know that for local drivers, theres only one place in Fort Lauderdale, FL, they go to when they have a car problem: Gunther Mazda.

    Check out our as well for all your tire-related needs. You can never pay too much attention to the only layer between your vehicle and the roads it drives on. Our team is proud to be multi-faceted and full of comprehensive car care up and down our lineup of services. Each day, our team goes above and beyond to help fix every car they see and bring peace of mind to the driver behind the wheel of that newly-serviced car. We cant wait to meet you and welcome you in.

    Recommended Reading: Toyota Camry Key Fob Battery Replacement

    How Do You Start A Car With A Dead Key Fob

    Push the START button with the key fob. Instead of pressing the button with your finger, push the key fob against it. Many manufacturers utilize this as a backup device to guarantee that the vehicle can start even if the fob is dead. Some automobiles include a secret key fob hole that may be used to start the engine.

    How To Reprogram Your Mazda 3 Key

    your key is programmed to work specifically with your Mazdaat least two working keys

  • Place the first working key into the slot and set your ignition to ON.
  • Leave the key in for five seconds, and then remove it.
  • Repeat with the second working key.
  • Take your new key and place it into the slot, setting the ignition to the ON position.
  • Leave it in for five seconds and set the ignition to OFF.
  • information added to your Mazda 3âs system

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    Replace Mazda Key Remote Battery

    Getting inside the remote flip key for certain Mazda models to replace the battery can be tricky. Heres how its done.

    The battery used in the Mazda remote shown in photos below utilizes the CR1620 lithium battery.

    Note: The CR2025 type lithium battery is used in the newer and different looking key fobs.

  • Press the button to release the key, then locate the slot inside where the key is housed.
  • Use a small flat-head screwdriver to press into the slot. The key remote should separate into two pieces.
  • Place the half that contains the metal key to the side. Use a small flat-head screwdriver to pry apart the remote half of the key at the location shown below.
  • Now you can pry the battery out of the battery compartment and replace it.
  • Once the battery is replaced, reverse these steps to put the key fob back together, and youre set.

    This tutorial is for remote keys included with the following models:

    • 2008-2013 Mazda 3, 5, 6,and 7
    • 2009-2013 Mazda CX-7, CX-9, and RX-8

    What Is The Car Battery For Mazda 3

    For CR1620 Battery Holder 2 Button Remote Key Fob Shell Case Folding ...

    Sorry if youre perplexed. I know its not an easy choice! But its one of the most crucial choices youll ever make. If youre still unsure which type of car battery for mazda 3 is best for you, I recommend comparing the characteristics and functionalities of the car battery for mazda 3 listed above. Each has advantages and disadvantages.

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    Changing The Mazda 3 Key Fob Battery

    Before you start changing the battery in the Mazdas key fob, make sure you have a small flathead screwdriver, a new CR2025 battery, and your key fob. We recommend wrapping the flathead screwdriver with some tape to prevent scratches.

    Youll have one of three types of key fobs: A smart key fob, a flip key fob, or a rectangular key fob.

    Replacing The Key Fob Battery Smart Fob

    You will need the CR2025 battery for the smart key fob for model years 2014 through 2018.

    • Step 1: Remove the battery.
    • Step 2: Slide the new battery in, ensuring it is face-up for proper polarity.
    • Step 3: Reinstall the battery cap.
    • Step 4: Snap the two pieces of the key fob cover together.
    • Step 5: Reinsert the metal key into its place.
    • Step 6: Test the key fob to ensure that it locks and unlocks the doors.

    Read Also: Portable Lithium Battery Power Station

    What Causes A Push Button Start Malfunction

    There are three major causes of a push button start malfunction in a Mazda 3. All of these issues are caused by an electrical issue with part of the ignition system. Knowing what could go wrong with the system is the first step in diagnosing and solving the problem.

    Here are the problems that can cause the “Push button start malfunction” warning to appear on your Mazda’s dashboard display.

    Replacing The Key Fob Battery Rectangular Fob

    How To Change A Mazda 3 Key Fob Battery-Flip Key (2010-2013)
    • Step 1: Press down on the top of the battery near the red dot with a screwdriver or your fingernail until it pops out.
    • Step 2: Place the CR2025 battery in the key fob, making sure its face-up for correct polarity. To do so, slide the battery toward the red dot, then press the bottom into place.
    • Step 3: Snap the two sides of the key fob together.
    • Step 4: Test the key fob to ensure the doors lock and unlock.

    Read Also: Where To Get Watch Batteries Replaced

    How Do You Change The Battery In A 2017 Mazda Key Fob

    How to Replace the Battery in a Mazda Key FobInsert the screwdriver into the slots created by the removal of the manual key. Remove the rubber battery cover once it has been opened. Replace the old battery with a new one, making that the positive side is facing up. Reassemble the key fob by pushing the components together firmly.

    Why Is My Mazda Key Fob Not Working

    Its possible that your key fob has a low charge if it doesnt operate until youre close to the car. If you have a spare electronic key fob, the first thing to do is replacing the battery otherwise, you may try replacing the battery. If this doesnt work, the transmitter within the vehicle may be malfunctioning.

    Also Check: How To Jump Start Dead Battery

    Push Button Start Malfunction In Mazda : Diagnosing And Fixing

    The Mazda 3 comes with a push button start that makes starting your car more convenient. You no longer have to wrestle with getting the key in the ignition. Starting your car is as easy as pushing a button. But what happens when your Mazda displays “Push button start malfunction” on the dashboard?

    What causes the push button start malfunction in the Mazda 3? The issue is usually caused by an electrical issue with a component of the ignition system. This could be the low system voltage or a damaged body control module. It could also be a result of a dead key fob battery.

    This issue is an annoyance that prevents you from getting your car started when you need it. In this article, we’ll discuss the different causes of the push button start malfunction, as well as how to fix them.

    Replacing The Key Fob Battery Flip Fob

    Battery For 2015 Mazda 3 Key Fob

    You will need one CR1620 battery for the flip key fob for model years 2010 through 2013. Youll also need a 3.00mm or smaller precision screwdriver, a toothpick, or another thin tool .

    • Step 1: Find the square compartment containing the battery once the key fob halves are separated.
    • Step 2: Place the precision screwdriver in the bottom-right corner of the battery compartment. Youll see a small triangle that points to this corner.
    • Step 3: Press down on the tool and pry the battery out with a rocking motion.
    • Step 4: Place the CR1620 battery in the compartment, face down. Click it into place.
    • Step 5: Snap the key fob together.
    • Step 6: Test the key fob to ensure that it locks and unlocks the doors.

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    When To Go To A Dealer For A Replacement

    If you have a car that was built within the last five years, a new-car dealer will usually be your best bet when you need a replacement key fob, due to the expensive programming equipment that is required, says John Ibbotson, CRs chief mechanic. Although it might be tempting to search for a cheaper key fob online, we learned from Audi and Subaru dealers that some won’t work with aftermarket key fobs.

    If you want a new key fob for your Audi, it has to come from us, said a service adviser at Hoffman Audi of East Hartford, Conn. There’s a built-in security chip in the fob that cannot be reprogrammed for another Audi. The need for this chip is also why you can’t buy a new aftermarket Audi key fob online. The fob has become a critical part of the security of the car, he said. The average price for an Audi key fob replacement, including programming, is $500, we were told.

    This isnt just the case for Audi, but European cars in general. They almost always force the customer to go to a dealer because the digital key encryption is only programmable by the manufacturer in a few select outlets in North America, says CRs Yu.

    Other retailers we called, including a Chrysler/Jeep/Dodge dealership and a Lexus dealership, said they dont mind trying to program aftermarket fobs if thats what the customer wants them to do, as long as the customer understands the risks involved.

    Consumer ReportsConsumer Reports

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