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How to Repair Car Key Fobs

Even though we test them numerous times keys aren't impervious to destruction. They are able to break down in various ways.

While the most common problem is the battery being dead, other issues can be much more serious. Luckily, most of these can be fixed by making a quick DIY fix at home.

Dead Battery

A dead battery is the main cause of a key fob that is not working. Fob batteries can deplete quickly, particularly if they are exposed to extreme heat or humid temperatures or water. It's a good idea keep an extra fob battery in your wallet in case.

You can usually tell that the battery of your car key fob is depleted by the fact that the LED light will cease to glow. The key fob could also stop working from the same distance it was previously working to. In this case it could be necessary to re-program your key fob or even replace it entirely.

It is simple to replace a car keyfob battery. Find out the type of battery used. The type should be engraved on the back of the fob. please click the following webpage can assist you when you're not sure. Unlock the key fob along the seam once you have identified the battery type. Use a flathead screwdriver, or even your fingernail, to pry apart the two halves. Take the old battery out, and replace it with a new one. Be sure to insert the new battery with the positive (+) side facing towards the buttons on the fob.

Some drivers may not realize the fob is dead until they attempt to lock or unlock their car and the buttons aren't responding. This can be fixed by reprogramming your fob. However it can be time-consuming and expensive. Another option is to contact roadside assistance and see if they are able to jump your vehicle and get you back on the road.

If you've tried both of these solutions but your car won't start then it's time to call a professional. A qualified technician can determine the computer in your car needs reconfiguring, or if your key fob is only in need of replacement batteries. They can also suggest an auto repair shop that can replace your key fob. Sometimes an entirely new fob could be the best solution.

Circuit Board Damage

A key fob can take some physical abuse and isn't indestructible. The circuit board, battery and buttons are all subject to wear and wear and tear. It is crucial to take care of these components to ensure your key fob remains in good condition.

Make sure that the battery still functioning in your key fob. If it is then replace the battery and determine if this fixes the issue. If this does not work, you might need to open the fob and clean its contact surfaces. This can be difficult since some key fobs do not have a release mechanism that is easy to open them up and you could damage your fob if you try to pull it apart. You can purchase a specific tool to open your key fob, however it is recommended to adhere to the manufacturer's guidelines to avoid damaging it.


A damaged or defective key fob circuit board is another common problem. This could be due to various factors, including dirt or moisture getting into the battery compartment. Software issues or an accident firmware update could be the cause for this. If your key fob isn't working completely, think about having it reprogrammed with locksmiths who specialize in this kind of work.

Radio interference is a different possibility. This can occur in the event that you have other wireless devices that transmit on the same frequency, like radar detectors or home security systems. If this is the case, you should inquire with the other device manufacturers to make sure that your key fob isn't affected by their signals.

You may also need to replace a switch or an electrical component of your key fob. This is a harder fix however, you can find online guides that will show you how to do it yourself. Be cautious when doing this, though because the circuit boards that are inside your key fob are tiny and are susceptible to breaking if they are handled roughly. If you're doing this yourself, be sure to use an SMT switch of good quality and then solder the switch into place correctly.

Worn Out Buttons

Car key fobs can suffer lots of wear and wear and tear. They are more prone to being dropped and spend a lot time being tossed around in your purse or pocket. This jostling can sometimes cause buttons to wear out or get stuck. If this happens, a simple adjustment may be all it takes to restore the button's functionality.

Most modern key fobs have sensors on them that can tell if they've been pressed. This is because they reduce the chances of someone stealing your vehicle. If the buttons on your key fob aren't responding when pushed, that's an indication that they're worn out and need to be replaced.

Key fobs also have an internal circuit board that transmits signals to the car. The signals include commands to unlock and lock and instructions to start your engine. If the circuit board within your vehicle is damaged, your key fob might not be able to unlock or start your engine. Most of the time, this kind of damage is caused by water, blunt force, or something scratching the circuit board.

You'll notice that the buttons on your key fob are deteriorating if you find yourself pressing the buttons more than normal to get them to function. Your fob might also stop sending an alert to your car or have a smaller range.

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

Fortunately, the majority of car keyfob issues aren't very complicated or even serious. The best way to avoid being caught off guard by a malfunctioning key fob is to have an extra in your pocket at all times. You'll never be caught in the middle because of an issue with your key or a lost one. If you have lost your spare key, an expert locksmith can rekey it to work with your vehicle's engine. They can also repair any internal damage to the key fob.

Broken Case

The case for your key fob is more than just a place to store the battery and buttons. The case also houses the circuitry that does all the electrical magic when you press the button on your key fob. This board receives the signal from your key fob, and then transmits it to your car.

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

Another reason your key fob might not be functioning is that the batteries are dying. This is a simple fix that can be accomplished at home by replacing the battery. The positive side is that you can find a replacement battery on the internet or at your local auto parts store since the batteries aren't limited to key fobs.

There are a variety of ways to open a key fob and get inside it, depending on the type. A quick search online should show you which type of key fob you have and what kind of battery it takes. From there, you can buy a replacement and easily pop the old one out and the new one in.

When repairing a broken key fob, the primary concern is not to destroy the circuit or buttons further. If you try to pry off the key fob with a screwdriver or other hard edge, it can crack the plastic or damage the case. Luckily, a replacement case is cheap and you can get a whole fob assembly with the electronics on eBay or Amazon for less than $40.

So, if your key fob doesn't work, check to see if the batteries are depleted or if the circuit board has been damaged. If that's not the case, a professional can repair it for you quickly and cheaply. If not, it could be the time to purchase an upgrade. Be sure to check the warranty on any fob replacement or used purchased online.

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