Six Resourceful Tips if Your Key Fob Stops Working

Published on

March 12, 2025

man uses key fob to unlock car

Key fobs have become an essential part of modern driving, offering unmatched convenience in a compact design. From locking and unlocking doors to opening the trunk or starting your car remotely, they streamline everyday tasks. That’s why addressing any issues with your key fob promptly is crucial to maintaining this convenience.

Why is My Key Fob Not Working?

Your key fob may not be working for several reasons. Perhaps the most common is that the battery on it is depleted and needs to be changed. Another common reason is that the key fob is damaged and isn't transmitting the signal as well as it should. Regardless of its problems, it's important to get to the bottom of things so that it works again and you can enjoy the convenience that comes with simply pushing a button versus inserting a key. In some vehicles, there isn't even the option to insert a key any longer, so if your key fob isn't working you could be out of luck.

How to Fix Your Key Fob

If your key fob isn’t functioning properly, there’s a good chance you can troubleshoot the issue yourself before seeking professional assistance. Here are some steps to help you get it working again:

Replace the Key Fob Battery

The most common reason why your key fob isn't working is a depleted battery. Most key fobs take 2032 lithium coin batteries, which aren't as common as AA or AAA. Noting this, you might not have any spares lying around the house. If you don't, you should be able to purchase them at your local hardware store.

To replace the key fob battery, be sure to reference your vehicle owner's manual. Most key fobs can be pried open to access and replace the battery. However, it's important to put the key fob back together properly, or else it may not function right. If you need assistance with a battery change, contact a GreatWater garage today.

Check for Physical Damage

If you've dropped your key fob one too many times, it may not work properly. Damaged key fobs can have difficulty transmitting the proper signal to your vehicle, which can impact how well it functions. In some cases, you may be able to repair the existing key fob by making sure all the internal parts are in the appropriate position. In other situations, like if the internal circuit board is damaged, the better solution is to replace - rather than repair - the key fob.

Test a Second Key Fob

If you’re lucky enough to have two key fobs for your vehicle and if one isn't working, it makes sense to test the second one to help with your troubleshooting. If the second one is working, now you know that the issue is with the one key fob and not with the vehicle. If both key fobs aren't working properly, there could be more significant electrical issues at play that you need to address.

Clear Out Any Interference

Key fobs also may not be working properly due to signal interference. If your key fob still works, but only at short distances, interference could be the issue. Test your key fob in areas where there are no tall buildings or other vehicles around. If it's working fine in some locations and not as well in others, the culprit is usually interference.

Reprogram It

Your key fob is only going to work when it's paired with your vehicle. If it loses its paired connection, it won't matter how hard or how often you push the buttons down - nothing will happen. If your key fob is still in good condition and the battery isn't the issue, try reprogramming it. Reference your vehicle owner's manual for instructions on how to reprogram your key fob or make an appointment at your local shop in the GreatWater network today.

Visit a Professional Auto Technician

If you're still stumped about why your key fob isn't working and have done all the troubleshooting that you can, your next step should be bringing your vehicle to a professional auto technician. Contact your local GreatWater-affiliated shop today to schedule an appointment.

Key Fob Maintenance Tips

Looking to keep your key fob working better for longer? Follow these tips:

  • Change the battery every one to two years to maintain the strong signal from the key fob to the vehicle.
  • Clean the exterior of the key fob frequently to prevent dirt and debris from entering the assembly. This is best done using a soft, damp cloth. You can also clean the internal components. That's best done with a cotton swab and rubbing alcohol.
  • Try not to expose your key fob to extreme cold or heat. This can lead to premature battery failure and poor overall functionality.
  • Consider storing your key fob in a protective case, much like you do with your phone. This can help prevent scratches and damage that could impact the functionality.
  • Don't let it get wet. Moisture and key fob components don't mix. It's another good reason to have a protective case on your key fob in case you drop it into a puddle or snowbank.

Find a GreatWater-Affiliated Shop Near You

As a network of full-service auto repair and maintenance centers, we do everything - no matter how big or small it is. If you're having key fob problems, contact us today to schedule an appointment. We'll get to the bottom of your key fob issue and quickly resolve it so you can again enjoy the convenience of the features it has to offer. When you combine our expert service with our commitment to exemplary customer service, you can't go wrong by taking your vehicle to a GreatWater garage.

Contact your local shop in the GreatWater network today for more information and to schedule an appointment.