If I change the battery in either the car or key fob do I have to reprogram the key fobs? (2024)

FAQs

If I change the battery in either the car or key fob do I have to reprogram the key fobs? ›

If I change the battery in either the car or key fob do I have to reprogram the key fobs? No, The key fobs use non-volatile memory, meaning that they will never lose their programming if power to either the key fob itself or the module is lost.

If your key fob isn't working after replacing the batteries, you may need to reprogram it or check for loose buttons and broken battery terminals. If your remote key fob isn't working and you've already replaced the battery, you may need to reprogram the key.

Deprogramming. If a car key stops operating, even after a battery swap, it may have been deprogrammed. Deprogramming is the process of telling a vehicle's onboard computer to delete all of the keys from its list of authorized users. Deprogramming can occur as a result of pressing buttons on the remote.

Yes, if enough time has passed since disconnecting the battery. Once all residual electricity has dissipated from your car's circuits, the volatile memory in your car computer, also known as the Engine Control Unit (ECU), will be cleared, resetting it to its default settings.

If your key fob still isn't functioning after you've replaced the batteries, the problem may be with the internal contacts, such as the buttons or the battery connector terminals. It's also possible that your car and remote unpaired from each other after you took the batteries out.

You could visit a dealership, car repair shop and even your favorite battery store to ask for a pro to replace the key fob battery for you. On the other hand, you can replace a dead car key fob battery yourself. Replacing a car key fob battery is easier than replacing an actual car battery.

If your car is equipped with onboard programming, you will be able to program a new transponder key or a keyless entry remote by yourself. If you own a newer vehicle, most likely it would not be equipped with onboard programming, and it will require a professional key programmer.

The cost of programming key fob typically ranges from as little as $50 to upwards of $200. This price variance largely depends on whether the key incorporates advanced technologies such as proximity features or requires more sophisticated programming tools.

How much does AutoZone charge to program a key fob? ›

Yes, AutoZone can help you find and replace the battery in your key fob. 2. How much does it cost to program a key fob? The cost can vary widely, but typically ranges from $50 to $200 depending on your vehicle and where you get it programmed.

The most common issue is the battery running out of charge and needing to be replaced. In most cases, a car key fob will last many years, but if it is used more frequently then you could end up having to buy one. This can easily be done at a local garage, tech shop or by yourself at home.

Check if the key fob is damaged and needs to be replaced. Ensure that the car's battery is functioning properly. Have the car's keyless entry system inspected by a professional. Check for any physical damage to the car's door locks.

Some components might lose their memory or have settings reset after the old battery has been disconnected. The alarm might go off. In some vehicles, disconnecting and reconnecting the battery can trigger the alarm system, requiring a reset. The battery might drain quickly.

After the battery has been changed, the automatic windows must be configured again. Additionally, the radio and on-board computer must be reset. Banner conclusion: No registration required; a check of the electrical functions after changing the battery is recommended.

Reset the vehicle's computer

How to do it: Your ECU should reset on its own while you drive the car after reconnecting the new battery. If it doesn't, there are two more ways to perform a reset: If you have a small wrench, use it to detach the positive battery terminal for about five to fifteen minutes and reattach it.

If your car is equipped with onboard programming, you will be able to program a new transponder key or a keyless entry remote by yourself. If you own a newer vehicle, most likely it would not be equipped with onboard programming, and it will require a professional key programmer.