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Key Fob Repair: Replacing the Battery

Getting jostled around in pockets and purses, key fob buttons can deteriorate and fail to register presses reliably. Replacing the battery, which most car fobs have in a snap-out bag, can sometimes fix this issue.

However, a fresh replacement is not likely to restore your key fob if the internal switch contacts are worn out. Fortunately, this is an easy fix you can attempt at home:

Replace the battery

If your key fob feels slow or takes a longer time to unlock or lock your car, it may be time to replace the battery. The replacement of a key fob's battery is among those easy tasks that you can perform yourself. It's also a cheap fix that can save you a trip to an expert locksmith or dealer.

The majority of key fobs need the use of a coin-type battery (CR2032 or similar) which can be found at any general store, home improvement center, or auto parts store. The key fobs come with slots for these batteries and it is easy to replace the battery. Depending on the brand you might need make use of a screwdriver to open the compartment.

If your key fob is equipped with clips that hold the batteries in place, gently remove them with your fingers or other non-metallic tools. Remove the old battery and replace it with the new one, but be cautious to note the orientation so that you can install it correctly. It is essential to avoid touching the batteries' flat surfaces, as finger marks can shorten their lifespan.


Once the new battery is installed, close the key fob's case and test it by pressing the button to make sure it is working. If it still doesn't work, you may need to reopen the fob and verify that the new battery is properly inserted.

You may also find that a simple replacement of the battery is not enough to solve the issue. This could be due to physical or electrical trauma. In this case you'll need to take your key fob to a dealership or auto service center to make repairs. Before you do this, there are four problems that the replacement battery can't fix. It is important to be aware of these issues, so that you can get help from a trained technician if needed. You should also read about how to repair a defective key fob transmitter to learn more about the reasons it may not be working properly.

Clean the Contacts

Maintaining your key fob's cleanliness is crucial to its function and longevity. Over time, the natural oils on your fingers and pockets can build up in key fob's buttons and in the crevices. This can lead to keys to not function. All you need is rubbing alcohol the cotton swab, and some rubbing alcool.

The key fob must be opened first by gently prying the battery away with either a screwdriver or coin. Note the type of battery (negative and positive sides) so you can put it back in the correct way.

Then, moisten a cotton swab or small brush with isopropyl (rubbing) alcohol and begin taking off the dirt from all of the fob's buttons and the surrounding areas. Be sure to pay particular attention to the contacts of the battery, and that they are clean. Once you're done, let the fob and all its components completely dry.

If remote key fob repair fob isn't functioning even after cleaning, you might want to reset the system. Refer to the owner's manual of your device for instructions on how to do this and follow them. If the key fob was just dead, this might be enough to bring it back to life.

Once the key fob has been cleaned and resynced it is a great idea to ensure regular maintenance. By regularly wiping it clean with a damp cloth and mild soap, you can ensure that your key fob will perform well for the years to come.

Reset the system

Despite the fact that today's high-tech key fobs are more powerful and secure than ever before, it's possible that they have certain issues. Most of the time these issues aren’t serious or complex and can be solved with simple methods, such as changing the battery. If the issue is severe or is not resolved with simple methods, an auto repair shop will replace and reprogram your key fob.

The primary purpose of the device is to lock or unlock your car, but you can also make use of it to activate certain features of your vehicle. One example is the ability to lower or raise a sunroof by using the key fob. This feature can be very useful when you have to open the roof while you are stuck in traffic or your hands are full. The key fob is also useful for summoning your car if it's parked in a shady place.

A key fob's internal circuitry and buttons could fail due to manufacturing defects or wear and tear. Symptoms include erratic behavior, or an inability to lock or unlock the car. Sometimes moisture, or other sources of electromagnetic interference can affect the operation of the key fob. If your key fob is dirty or has become wet, it should be cleaned prior to attempting to use it again.

Replacing the battery on the key fob or cleaning the contacts can help fix a malfunctioning device but if it persists to operate in a erratic manner you might need to do a factory reset. This can clear up system bugs and restore the operating efficiency of the device.

If you're unsure how to do a factory reset on your device, refer to the device manufacturer's website or the manual of your owner. Certain devices require special tools to reset them, but you'll need to find the correct instructions for your model.

Contacting a mobile car locksmith in Apache Junction is another option to solve problems with your keyfob. They can repair and program keyfobs for almost all models of cars. Additionally, they can also fix car keys with chips in them.

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