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How to Repair Car Key Fobs

Key fobs can become damaged, even if we use them a lot. In fact, they are able to break down in a variety of ways.

Other issues can be more important than an unresponsive battery. Many of problems can be fixed with a quick fix at home.

Dead Battery

A dead battery is the most common reason for a key fob that is not working. Fob batteries are known to drain quickly, especially if they are exposed to hot or cold temperatures, humidity or even water. Keep an extra battery in your wallet in case you need it.

You can usually tell the moment your car key fob's battery is depleted because the light on the LED will cease to glow. It's also possible that the fob won't function at the same distance it used to. In this case the key fob could need to be reprogrammed or replaced completely.

It is simple to replace the battery in a car keyfob. Find out the kind of battery used. The type of battery should be engraved on the side of your key fob. If you're not sure, doing a quick Google search will be helpful. Once you've found the kind of battery you want and the key fob, you can open it at the seam. You'll need a small flathead screwdriver or your fingernail to break the two halves. Then, you can remove the battery that was removed and replace it with an alternative one in its place. Insert the new battery so that the positive (+) face is facing the buttons on the fob.

Some drivers may not be aware the fob is dead until they attempt to lock or unlock their car and the buttons do not respond. In some instances this problem can be resolved by reprogramming your fob, however, it can be costly and time-consuming. You can also contact roadside assistance to see if they are able to start your vehicle and get it back on the road.

If you've tried every solution but your vehicle doesn't turn on, it's time to contact a professional. A qualified technician can determine whether your car's computer requires changing its programming, or if the fob is only in need of a new battery. They may also recommend an auto shop to replace your key fob. Sometimes it is possible that a new fob may be the best solution.

Circuit Board Damage

Key fobs aren't impervious to destruction, but it can be able to withstand a variety of physical damage. The battery, circuit board, and buttons all get their fair amount of wear and tear with time, so it's important to be vigilant and take care of them in order to keep your car key fob working well.

The easiest thing to check is to make sure the battery in your key fob isn't dead. If it is replaced, determine if this fixes the issue. If this does not work, you might need to open the fob and clean its contact surfaces. It isn't easy to open certain key fobs since they do not have an easy-release mechanism. You can damage the fob by trying to force it apart. You can purchase a special tool to open your key fob, however it is recommended to adhere to the manufacturer's guidelines to avoid damaging it.

A damaged or corrupted key fob circuit board is a common problem. It can be caused by many things like dirt or moisture that gets into the battery compartment software, hardware issues or even an unintentional firmware update. If your key fob has stopped working completely, you should think about having it reprogrammed with a locksmith that specializes in this kind of work.

Radio interference is also a possibility. It could happen when you have other wireless devices around that transmit on the same frequency, such as radar detectors or home security systems. If this is the case, you should contact the other device manufacturer to make sure that your key fob will not be affected by their signals.

It's also possible that your key fob has a bad switch or other electrical component that should be replaced. There are online guides that help you fix this yourself. Be key fob repair , however, as the circuit board that is inside your key fob is very small and could easily break if handled roughly. If you're doing it yourself, be sure to use an SMT switch of good quality and then solder the switch into place in a proper manner.

Buttons that are worn out

Car key fobs are susceptible to a lot wear and tear. They are more prone to being dropped and spend a lot time being tossed around in your purse or pocket. Sometimes, this can cause the buttons to become worn out or stuck. A simple adjustment can fix the issue.

The majority of modern key fobs have sensors on them that tell if they've been pressed. This is due to the fact that they decrease the chances of someone stealing your vehicle. If your key fob's buttons aren't responding when pushed it's a sign that they're worn out and require to be replaced.

Key fobs also have a circuit board inside them which transmits signals to your car. These signals include commands to unlock and lock your car, as well as commands to start your engine. If the internal circuit board is damaged, your key fob will not be able to unlock or start your engine. Generally, this kind of damage is caused by water, blunt force or something that scratches the circuit board.

You'll notice that the buttons on your key fob are wearing down If you're finding yourself pressing them harder than usual in order to get them working. In addition, your fob may cease transmitting signals to the car or have less range than it did prior to.

Contact a locksmith immediately when you're unable to use your key fob to start your vehicle. They'll be able determine whether the key fob is damaged or your ignition cylinder has worn out.

Fortunately, the majority of car key fob issues aren't serious or complicated. The best way to ensure you don't get caught off guard by an unresponsive key fob is to keep an extra in your pocket at all times. This will ensure that you're never left stranded somewhere due to an unreliable or lost key. Of course, if you do happen to lose your spare car key, a locksmith will be able to change the key to work with your car's ignition. They can also fix any internal damage to your key fob.

Broken Case

A key fob's case does more than just protect the battery and buttons. The case also houses the circuitry that does all the electrical magic whenever you press a key fob button. The board transmits the signal from your keyfob to your car.

If this board is damaged or dead your key fob will not be able to operate. Sometimes a dead key fob will just need to be reset which is something that your local auto locksmith or dealership can help you with.

Another reason your key fob might not be working is that the batteries are dying. This is a simple fix that can be accomplished at home by replacing the battery. The good news is that you can get the replacement battery online or at your local auto parts store, since the batteries aren't limited to key fobs.

There are a variety of ways to open the key fob and go inside it, depending on the kind. A quick search on the internet will reveal what kind of key fob yours is and the type of battery it takes. You can then buy an alternative and take the old one out and then insert the new one into.

The main concern when you repair an old car key fob is that you don't want to cause damage to the circuit board or buttons further. Trying to pry apart a key fob with an edge that is sharp like a screwdriver could break the case or damage the plastic. Luckily, a replacement case is inexpensive and you can get a whole fob assembly with the electronics on eBay or Amazon for less than $40.


If your key fob won't function, make sure you've damaged the circuit board or the batteries. If that's not the situation, a professional could repair it for you quickly and cost-effectively. If not, it might be time to replace the fob. Just be sure to check for a warranty on any replacement or used fobs that you purchase online.

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