Do I Have To Reprogram My Fob After Battery Replacement?

As an Amazon Associate, I Earn From Qualifying Purchases.

Last Updated on November 7, 2022 by Ellis Gibson (B.Sc. in Mechanical Engineering)

If you’ve ever had to replace the battery in your car’s key fob, you may have been left wondering if you also need to reprogram the fob. The good news is that in most cases, you don’t need to reprogram your key fob after replacing the battery.

However, there are a few exceptions to this rule. In this article, we’ll explain when you need to reprogram your key fob after replacing the battery and how to do it.

If you’re not sure whether or not you need to reprogram your key fob after replacing the battery, read on for more information. This article will explain what you need to do to reprogram your key fob, as well as when you should do it.

So, do i have to reprogram my fob after battery replacement?

No, you should not have to reprogram your fob after replacing the battery.

With the recent trend of people being more and more mobile, it’s no surprise that key fobs have become increasingly popular. Unfortunately, like anything else that relies on battery power, key fobs often have to be replaced. With that in mind, here are a few things to keep in mind when it comes to key fob replacements:

-The battery on a key fob typically needs to be replaced every 3-5 years, depending on how much use the fob is put through.

-Normally, you don’t need to reprogram a key fob when it’s replaced. However, if your original key fob doesn’t work anymore and you don’t have the original remote, you’ll need to reprogram it. The cost of programming a key fob can range from 50 to 100 dollars, depending on the automaker and the complexity of the design.

-Some dealers will do the programming for you for free, while others will charge a half hour to an hour of labor.

Hopefully, this information has been helpful. If you have any further questions, please keep reading.

Let’s dig into it and see if we can solve the mystery.

Why Won’T My Key Fob Work After I Changed The Battery?

If you’ve recently changed the battery in your key fob and it still isn’t working, there are a few things you can try. First, check to make sure the battery is installed correctly. If it is, then try resetting the key fob by holding down the button for a few seconds. If that doesn’t work, there may be an issue with the key fob itself and you may need to get it replaced.

Besides this, There is a high chance that a car remote has been reset during the battery change. The key fob can also reset when you press certain buttons. So, more than one key fob not working is a good signal that the car key remote has been reset.

What Happens If I Don’T Reprogram My Fob After Replacing The Battery?

If you don’t reprogram your fob after replacing the battery, your car won’t start. The fob contains a chip that sends a signal to the car’s engine, telling it to start. If the chip is not programmed, the car will not start.

How Do I Reprogram My Key Fob After Replacing The Battery?

If you’ve recently replaced the battery in your key fob, you may be wondering how to reprogram it. Here’s a quick guide to help you out.


Start by opening up your key fob to access the battery. You should see a small plastic cover that you can easily remove. Once the cover is off, disconnect the battery and remove it from the key fob.


With the old battery out, take a look at the new battery to make sure it is properly orientated. The new battery must be inserted with the plus side facing up.


Once the new battery is in, close up the key fob and test it out. If the key fob still doesn’t work, don’t worry. There is a simple solution that can be found in your car’s owner’s manual.


The solution is to insert the key into the keyhole under the plastic cover. Once the key is inserted, press the Open button to open the door. Once the door is open, insert the key into the ignition and turn it on. This will reprogram or synchronize your key fob and it should now work properly.

Is There A Way To Avoid Having To Reprogram My Fob After Replacing The Battery?

If you have a keyless entry system on your vehicle, it’s important to know that replacing the battery will usually require you to reprogram the fob. This is because the fob uses a code that is specific to the battery in order to work. When you replace the battery, the code is no longer valid and will need to be updated.

There are a few ways that you can update the code on your keyless entry fob. One way is to take it to a dealer or locksmith and have them update the code for you. This is usually the easiest and most reliable method.

Another way to update the code on your keyless entry fob is to do it yourself. This can be a little more tricky, but it is possible. You will need to find the owner’s manual for your vehicle and follow the instructions for programming the keyless entry fob.

If you are having trouble finding the owner’s manual or you can’t figure out how to program the fob, you can always call the manufacturer of your vehicle. They should be able to help you out.

In most cases, replacing the battery in your keyless entry fob will not be a big deal. However, it’s always a good idea to know how to update the code in case you ever need to. This way, you can be sure that your fob will always work and you won’t have to worry about being locked out of your car.

Final Word

In conclusion, it is not necessary to reprogram your fob after battery replacement. However, if your fob is not working properly after the battery has been replaced, you may need to reprogram it.

There are a few key points you need to think about before making a decision.

-After you replace the battery in your key fob, you will need to reprogram the key fob to your car.

-If you don’t reprogram the key fob, it will not work with your car.

Related Post: