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.