How Long Does a Key Fob Battery Last?

In order to get into a modern car, you will usually have to have the key fob that comes with the car. These key fobs can do everything from unlock the doors of the car to remote starting, in some cases. These fobs are powered by a small flat key fob battery. Just like any other battery, eventually the key fob battery will have to be replaced in order to keep the key fob functional. Every time that a driver wants to use their key fob, the battery will have to produce the electricity that is needed to power it. A key fob battery will usually last around three to four years before it will need to be replaced. Not having a fully functional key fob can lead to a lot of frustration and stress. In some cases, it will be impossible for a person to get into their car without a working key fob. When the time comes to get a new battery, you will have to take some time to research exactly what you need. By getting an idea of what is needed, you will be able to find the right battery in no time at all.

Usually, getting the battery out of a key fob can pose a bit of a problem for an inexperienced car owner. Some key fobs will snap apart, while others will have a screw that will need to be taken out. Attempting to do this on your own may cause you to damage the key fob, which will cost you even more money to fix. Many of the key fobs out there are quite expensive due to how high tech they are.

When your key fob battery is bad, here are some of the things that you will start to notice when your key fob battery is going bad:

  • The car will not unlock
  • It is taking a lot more effort to get the key fob to work
  • The buttons on the key fob will only work on occasion

By noticing the signs that your key fob is giving you, it will be easy to replace the battery and restore its functionality. Make sure that a high-quality replacement battery is replaced correctly or just have an experienced mechanic inspect and replace the key fob battery for you.


Next Step

Schedule Power door locks are not working Inspection

The most popular service booked by readers of this article is Power door locks are not working Inspection. Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Power door locks are not working Inspection reviews

Excellent Rating

(137)

Rating Summary
127
5
2
0
3
127
5
2
0
3

Mike

27 years of experience
265 reviews
Mike
27 years of experience
Chevrolet Tahoe V8-5.3L - Power door locks are not working - Westland, Michigan
Very Informative and knows what he's doing. Will work with him again, bruh got the Tools for it all.
Lincoln Aviator - Power door locks are not working - Livonia, Michigan
Came to fulfill a warranty on the door actuators and found out that it wasn't the actuators and kindly and helpfully explained to me of a deeper underlying issue! And got it all sorted out for me. Thanks, Mike!

Ronnie

31 years of experience
152 reviews
Ronnie
31 years of experience
BMW 535i L6-3.0L Turbo - Power door locks are not working Inspection - Franklin, Tennessee
Ronnie was very thorough in discussing with me the issues with my car. He was very professional, easy to understand and very knowledgeable.

Daniel

12 years of experience
90 reviews
Daniel
12 years of experience
Subaru Impreza H4-2.5L - Power door locks are not working - Las Vegas, Nevada
Daniel showed up early. Daniel also communicate me with text on the part. He even helped me with other issues I am keeping him anything my car needs I am taking it to him  thank you so much for helping me!!!

Walter

47 years of experience
416 reviews
Walter
47 years of experience
GMC Sierra 1500 V8-4.8L - Power door locks are not working Inspection - Jenks, Oklahoma
He was very friendly and professional!! Explained everything he was doing and why. Brought some things to my attention that I was not aware of. I had a wonderful experience!!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How to Remove a Broken Car Key From the Ignition
After After many years of use, your car key may break off in the lock. When this happens, it renders the lock unusable until you can get the broken piece out. If your car was already locked when the key...
How to Program the Key Fob for Your Honda or Acura
Over Over time, it has become a convenience for us to have remote controls for different functions of our vehicles. Remote keyless entry is the most common, but many vehicles also have remote engine starting. We have become so accustomed...
How to Replace a Key Fob Battery
Key fobs allow easy access to your car. Once the key fob battery is weak or dead you'll lose your fob's ability to control remote functions.

Related questions

How do you program a personal security code for the Securicode® system?
If your car is equipped with the Securicode® system (not all Fusions have this), you have the ability to program up to three custom personal security codes. These codes can then be used to lock or unlock the doors, as...
Key turns in the ignition but car won't start
The remote may need the battery replaced. Try another good remote, or change the batteries in the remote. If this does not work, then you may have to get the antitheft system tested using the dealer's scanner. This will test,...
Doors lock and Unlock when vehicle is off and parked!
Hello, thank you for writing in. The vehicle may be having an issue with its body control module. Due to the locks doing this on their own, and the issue with the key-less entry (which works on its own circuitry),...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com