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How to Repair Car Key Fobs

Even though we test them numerous times, key fobs are not indestructible. They can actually be destroyed in various ways.

Other issues could be more important than an unresponsive battery. Fortunately, the majority of these issues can be solved with a quick DIY fix at home.

Dead Battery

A dead battery is likely the most common reason a car key fob stops working. Fob batteries can deplete quickly, particularly if they are exposed to hot or humid temperatures 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 dying by the fact that the LED light will cease to glow. It is also possible that the fob won't work from the same distance as it used to. In this case the key fob might need to be programmed again or replaced entirely.

Fortunately, replacing a car key fob battery is a simple task. First, you need to determine the kind of battery is used. The type of battery should be engraved on the back of your key fob. Google can help if you're not sure. Once you have found the type of battery, open the key fob at the junction. You will need to use a small flathead screwdriver or your fingernail to split the two halves. Take the old battery out, and replace it with a new one. Make sure to insert the new battery with the positive (+) side facing up toward the buttons in the fob.

Some drivers aren't aware that their fob is dead until they lock or unlock their vehicle and the buttons don't work anymore. In some instances this issue can be resolved by reprogramming your fob, but that can be costly and time-consuming. You can also contact roadside assistance to find out whether they are able to jumpstart your vehicle and get it back on the road.

If you've tried both solutions and your vehicle still won't start, it's the right time to contact a professional. A qualified technician will be able to determine whether your vehicle's computer system requires reprogramming or the fob simply requires a replacement battery. They can also recommend a reliable auto shop to replace your fob's key. In the end, sometimes a brand new fob is the most effective solution.

Damaged Circuit Board

A key fob can take many physical abuses and is not indestructible. The battery, circuit board and buttons are all subject to wear and tear. It is essential to take care of these parts to ensure your key fob remains in good condition.

Check that the battery is still functioning on your key fob. If it is then replace the battery and determine if this fixes the problem. If this doesn't work, you may need to open the fob and clean the contact surfaces. It can be difficult to open certain key fobs since they don't have an easy-release mechanism. You may damage the fob by trying to take it apart. You can purchase a special tool to open your key fob, but it is recommended to adhere to the manufacturer's guidelines to avoid damaging it.

Another common problem is a damaged or faulty circuit board inside the key fob. This can be caused by many things, including moisture or dirt getting into the battery compartment. Issues with software or an unintentional firmware update may be the cause of this. If your key fob has stopped functioning, you might think about having it changed. This can be done by a locksmith who is skilled in this kind of work.

Radio interference is a different possibility. This could happen when you have other wireless devices that transmit on the same frequency, such as radar detectors or home security systems. If this is the case, inquire with the other manufacturers of your device to ensure that your key fob isn't affected by their signals.

It's also possible that your key fob may have a bad switch or other electrical component that needs to be replaced. This is a difficult fix, but you can find online guides that will show you how to do it yourself. Be careful, however, as the circuit board in the key fob is tiny and could easily break when handled rough. If you're doing it yourself, ensure you make use of an SMT switch that is of high-quality and solder the switch in place in a proper manner.

Buttons that are worn out

Car key fobs can suffer quite a bit of wear and tear. They are more prone to being dropped and spend a lot of time in your purse or pocket. Sometimes, this jostling can cause the buttons to become worn out or snagged. A simple adjustment can fix the issue.

Most modern key fobs come with sensors on them that can detect if they've been pressed. This is because they reduce the chances of someone stealing your vehicle. If your key fob's buttons aren't responding when you press them this is a sign that they're worn-out and need to be replaced.

The circuit board inside the key fob also sends signals to your car. These signals include commands to unlock and lock your car, and instructions to start the engine. If the circuit board inside is damaged, your key fob might not allow you to unlock or start your engine. Typically, this type of damage is caused by water, force blunt or something that scratches the circuit board.

If you have to press the buttons harder than normal to get them to function If this is the case, then your key fob buttons are becoming worn out. Additionally, your fob may stop sending a signal to the car or it'll have a lower range than it did before.

If you're unable get your key fob to unlock or start your car, you need to call a locksmith in your area immediately. They can determine if the key fob is damaged or the cylinder in your ignition is worn out.

Fortunately, the majority of car keyfob problems aren't complicated or serious. Keep an extra key fob in your car always in case you end up being thrown off by a malfunctioning one. This will ensure that you're never stuck in a bind because of the loss or malfunction of your key. If you lose your spare key a professional locksmith can rekey it to work with your car's engine. They can also repair any internal damage to your key fob.

Broken Key Repair Case

The case of the key fob is more than just protect the batteries and buttons. The case also houses the circuitry that executes all the electrical magic every time you press the button on your key fob. This board receives the signal from your key fob and transmits it to your car.

If this board is damaged or dead the key fob won't be able to operate. Sometimes, a key fob that is dead can be reset which is something that your local auto key fob repair locksmith or dealership can assist you with.

Batteries could be the cause the key fob's not working. 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 these batteries aren't exclusive to key fobs.

Depending on the kind of key fob, there is different ways to open it up and get inside. You can find out what kind of battery your key fob has by conducting a quick internet search. From there, you can buy the replacement and simply take the old one out and put the new one in.

The biggest concern when repairing an old car key fob is that you don't want to damage the circuit board or buttons further. Trying to pry apart a key fob with a sharp edge, such as screwdrivers can break the case or crack the plastic. Fortunately, a replacement case is inexpensive and you can purchase an entire fob with the electronic components from eBay or Amazon for less than $40.

If your key fob won't work, check if you've damaged the circuit board or the batteries. If this isn't the case, you can have it repaired quickly and easily by an expert. If not, it could be time to replace the fob. Make sure you check for a warranty on any used or replacement fobs you buy online.