If your key fob has suddenly stopped working, it could be due to a dead battery. Replacing it with one that fits properly can be easy and affordable; just find one with compatible connectors!
To swap out your key fob battery, a small flathead screwdriver will come in handy to pry open its housing. Once inside, simply replace the old battery with a brand new CR2032 coin cell battery.
How to replace the key fob battery
Often the cause of nonfunctioning key fobs is dead batteries. Replacing them is simple and costs minimally – just make sure you purchase the appropriate type from any auto parts store or gas station.
To change a battery, a small flat screwdriver will come in handy to pry open your key fob and expose its old one. After this has been accomplished, take off its cover and remove it before replacing with your new battery, making sure that its orientation matches up with any markings on its fob. Finally, snap back together both halves of the key fob before testing its remote buttons to make sure everything works as intended.
Keep a spare key fob battery stored safely so you can easily switch it out when needed, as well as keeping an extra cover to shield it from weather elements.
What is the key fob battery size?
Key fob batteries are inexpensive button cell batteries used to power remote controls in cars such as Mitsubishi Mirages. You can purchase replacement keys at auto parts stores. If your Mitsubishi Mirage remote control has become unresponsive, replacing its key fob battery may be an easy fix.
One way to determine if it’s your battery that needs replacing is by checking whether your key fob can still access its features from outside. If door chime or power windows no longer function, then it may be time for a change.
Key fob batteries typically use metal clips to remain secure, so opening your key fob before replacing it may be necessary. For maximum effectiveness, it is best to purchase an identical replacement battery from its same size series; different lithium battery chemistries have different discharge characteristics that could cause issues.
How long does the key fob battery last?
Key fob batteries typically last three to four years with regular use, making it possible to assess its condition by monitoring whether its range has diminished, or whether more clicks are required than usual to lock and unlock your car – these could be indicators that it has reached its end of life and may need replacing soon.
If the key fob has been exposed to liquid, remove its battery and clean its electronic chip with paper towel or isopropyl alcohol before reinserting it. Reprogramming may also be required after changing batteries; please refer to your owner’s manual for guidance on this matter.
Keep a spare key fob battery handy so that when necessary, replacement can happen swiftly and easily. These batteries can usually be found for around $5-10 at most general stores and auto parts shops; most key fobs accept lithium button cell batteries such as the CR2032 or CR2025 batteries (physical dimensions 20×2.5 mm); these are often known by other names such as DL2025, KCR2025, SB-T14 or 5003LC among others.
How to program the key fob
If your key fob isn’t functioning, you may require it to be reprogrammed – either by a professional locksmith or dealer. There may be various causes why your key fob may no longer work including dead coin battery replacement costs, water damage to its receiver module and its subsequent malfunction.
A dead coin battery is often the source of key fob problems, and is easily replaceable following instructions in your owner’s manual. If your key fob has been exposed to water, however, be sure to remove its battery and clean it off using paper towel – salty water can do even more damage to its electronics than plain tapwater!
If your key fob contains a transponder chip or smart key, it will need to be programmed. This must be completed at either the dealership or automotive locksmith; non-transponder metal keys do not require programming – simply disconnecting the 12V battery for 15 minutes may suffice.
FAQ
What type of battery does the Mitsubishi Mirage key fob use?
The Mitsubishi Mirage key fob typically uses a CR2032 lithium coin battery. It provides reliable power and is widely available in hardware stores and online marketplaces.
How do I know if my Mitsubishi Mirage key fob battery needs replacing?
If the key fob becomes unresponsive, the vehicle displays a “key fob battery low” warning, or the range decreases significantly, it’s time to replace the battery.
Can I replace the Mitsubishi Mirage key fob battery myself?
Yes, you can easily replace the battery at home with a new CR2032 coin battery and a small flat-head screwdriver or plastic pry tool to open the key fob.
How do I open the Mitsubishi Mirage key fob to replace the battery?
Remove the mechanical key by pressing the release button. Use a flat tool to carefully pry open the key fob along the seam. Be gentle to avoid damaging the casing.
Where can I buy a replacement CR2032 battery for my key fob?
CR2032 batteries are available at hardware stores, automotive shops, pharmacies, and online. Look for high-quality brands to ensure better performance and longer life.
How long does the battery in the Mitsubishi Mirage key fob last?
The battery typically lasts two to three years, depending on usage. Using remote functions frequently, such as unlocking or remote start, can reduce battery life.
Do I need to reprogram the key fob after changing the battery?
No, changing the battery does not affect the programming. The key fob will function as usual once the new battery is installed correctly.
What should I do if the key fob doesn’t work after replacing the battery?
Ensure the battery is installed with the positive (+) side facing up. If it still doesn’t work, try another new battery or consult your local Mitsubishi dealer for assistance.
How much does a CR2032 battery cost?
A CR2032 battery typically costs between $3 and $10, depending on the brand and where you purchase it. Replacing the battery yourself is a cost-effective option.
How do I dispose of the old battery?
Dispose of the used battery at a designated recycling center to prevent environmental harm. Avoid throwing lithium batteries in regular trash bins.
Can I use a different brand of CR2032 battery?
Yes, any reputable brand will work as long as the battery is CR2032. High-quality brands tend to provide more consistent performance and longer battery life.
How often should I replace the key fob battery?
It’s recommended to replace the battery every two to three years or sooner if you notice decreased range or responsiveness.
Can extreme temperatures affect the key fob battery?
Yes, exposure to extreme heat or cold can reduce the battery’s efficiency. Store the key fob in a cool, dry place to prolong battery life.
What should I do if the battery dies while I’m away from home?
Use the mechanical key inside the fob to unlock the driver’s door. If your Mirage has push-start functionality, hold the dead fob close to the start button to start the engine.
Can I use rechargeable batteries for my key fob?
Rechargeable batteries are not recommended, as they do not provide the consistent voltage needed for optimal performance. Use a standard CR2032 lithium battery instead.
How can I test if the new battery is working?
Press any button on the key fob. If the vehicle responds, the battery is correctly installed. If not, recheck the installation or try another new battery.
What happens if I install the battery incorrectly?
If the battery is installed with the wrong polarity, the key fob will not function. Ensure the positive (+) side of the battery faces up during installation.
What should I do if the key fob casing breaks during replacement?
If the casing breaks, you may need to replace the key fob. Contact your Mitsubishi dealership for a replacement and programming assistance.
How do I align the key fob casing after replacing the battery?
Align the two halves of the key fob and press them together until they click securely into place. Reinsert the mechanical key if it was removed.
How do I unlock all doors if the key fob battery is dead?
Use the mechanical key to unlock the driver’s door, then press the unlock button inside the vehicle to unlock all doors.
Does the key fob battery affect the car alarm?
Yes, a dead battery may prevent the fob from arming or disarming the alarm. Replace the battery promptly to ensure all features function properly.
How do I prevent the key fob battery from draining too quickly?
Store the key fob away from other electronics to avoid interference. Avoid pressing buttons accidentally, and use high-quality batteries for longer life.
Can I unlock the trunk if the key fob battery is dead?
Use the mechanical key to unlock the driver’s door, then access the trunk release button inside the vehicle.
Will the key fob light up after replacing the battery?
Some key fobs have an LED light that flashes when a button is pressed. If the light doesn’t flash, recheck the battery installation.
Can I drive the Mirage if the key fob battery is dead?
Yes, hold the dead fob close to the push-start button while pressing the brake to start the engine.
What should I do if the “key fob battery low” warning stays on after replacement?
Restart the vehicle to clear the warning. If it persists, remove and reinstall the battery. If the issue continues, contact your dealer.
How do I store spare batteries?
Store spare batteries in a cool, dry place away from heat and moisture to ensure they remain functional when needed.
What is the typical range of a Mitsubishi Mirage key fob?
The range is usually 100 to 300 feet. A new battery restores the fob’s range, ensuring reliable remote access.
Does the key fob need to be re-synced after battery replacement?
In most cases, re-syncing is not required. If the key fob doesn’t work, hold it near the start button while pressing the brake to reconnect it.
Can I use the key fob if the battery is low?
A low battery may still allow basic functions but could reduce range and reliability. Replace the battery as soon as possible.
How do I prevent the key fob from getting damaged?
Avoid dropping the key fob or exposing it to water and extreme temperatures. Use a key fob cover for added protection.
Can the key fob battery drain while not in use?
Yes, storing the fob near other electronics may cause interference and drain the battery. Store it in a separate, safe place to preserve battery life.
How do I know if the battery is correctly installed?
The positive (+) side of the battery should face up. Some key fobs also have indicators inside the battery compartment to guide installation.
Can I replace the battery without tools?
Some key fobs may open without tools, but using a small flat tool makes the process easier and helps avoid damaging the casing.
What should I do if I lose my key fob?
Contact your Mitsubishi dealer for a replacement. The new fob will need to be programmed to your vehicle to restore full functionality.
Does replacing the battery affect remote start?
Yes, a dead or weak battery may prevent remote start from functioning. Replace the battery to restore all remote features.