How to Repair Car Key Fobs
Even though we test them many a times keys are not indestructible. In fact, they could break down in a variety of ways.
Other issues can be more important than the battery being dead. Most of these issues can be resolved with a quick fix at home.
Dead Battery
A dead battery is probably the most frequent reason the car key fob stops functioning. Fob batteries can deplete quickly, particularly if they are exposed to hot or cold temperatures, humidity, or water. It is a good idea to keep an additional fob battery in your wallet just in case.
The LED light will usually stop blinking when the battery in the car key fob is running low. It's also possible that your key fob won't function from the same distance as it used to. In this case it might be necessary to re-program your key fob or even replace it entirely.
Fortunately, replacing a car key fob battery is easy. First, you need to determine the type of battery is used. The type should be engraved on the side of the fob. If you're unsure it is, a quick Google search will help. Once you have found the battery type and the key fob, you can open it at the junction. Use a flathead screwdriver, or your fingernail to pry apart the two halves. Then, remove the old battery and put an alternative one in its place. Then, insert the new battery so that the positive (+) face is facing the buttons on the fob.
Some drivers may not realize their fob is dead until they try to lock or unlock their car and the buttons do not respond. This can be fixed by reprogramming your fob. However it can be costly and time-consuming. Another option is to call roadside assistance and see if they can jump your car and get you back on the road.
If you've tried all three of these methods but your car won't start and you're not sure why, it's time for a professional. A certified technician can determine the computer in your car needs reprogramming, or if the fob simply needs a new battery. They can also recommend a reliable auto repair shop to replace your key fob. Sometimes, however, a new fob could be the best option.
Damaged Circuit Board
Key fobs aren't impervious to destruction, but it can withstand a lot of physical damage. The battery, circuit board buttons, and other components all suffer their fair share of wear and tear over the course of time and it's crucial to be vigilant and take care of them to keep your car key fob working well.
The easiest thing to check is to ensure that the battery inside your key fob isn't dead. If it is, replace the battery and check if it fixes your problem. If not, you'll need to open the key fob and clean the contact surfaces. This can be a challenge since some key fobs do not have a release mechanism that is easy to unlock them and you may end up damaging your key fob if attempt to break it. You can purchase a special tool for opening your key fob. However, you should follow the directions of the manufacturer to avoid damaging it.
A damaged or corrupted key circuit board for the fob is another frequent issue. This can be caused by many things, including dirt or moisture entering the battery compartment. Software issues or an unintentional firmware update may also cause this. If your key fob has stopped functioning, you might want to consider having it changed. This can be done by a locksmith who is skilled in this kind of work.
Radio interference is another possibility. This could happen if there are other wireless devices transmitting on the same frequency your key fob, like radar detectors or home security systems. If this is the case, check with the other manufacturers of your device to make sure that your key fob's signal isn't affected by their signals.
It's also possible that your key fob may have an unreliable switch or electrical component that should be replaced. This is a harder fix however, there are guides online that explain how to do it yourself. Be cautious, however, as the circuit board inside the key fob is tiny and is prone to breaking if handled with care. If you do this yourself, make sure to use a good quality SMT switch and solder it in place correctly.
Buttons that are worn out
Car key fobs are prone to lots of wear and tear. They are more prone to being lost and spend a significant amount of time being tossed around in your purse or pocket. The constant jostling can cause the buttons to wear down or become stuck. In this case, a simple adjustment may be all that's needed to get it working again.
Modern key fobs are fitted with sensors that detect when they've been hit. They're designed to do this because they can help decrease the chance of someone stealing your car. If the buttons on your key fob aren't responding when pushed this is a sign that they're worn out and need to be replaced.
The circuit board that is in the key fob also sends signals to your car. These signals include unlock and lock commands and also commands to start your engine. If the circuit board inside is damaged, then your key fob may not unlock or start your engine. This kind of damage is typically caused by water or blunt force.
You'll be able to tell that the buttons on your key fob are deteriorating If you're finding yourself pressing more than usual to get them to work. The fob may be unable to send signals to your car or have a lower range.
Contact a locksmith right away if you are unable to use your key fob to access your vehicle. They can tell if the key fob is damaged or the cylinder of your ignition is worn out.
Fortunately, most key fobs for cars problems aren't too difficult or serious. The best way to avoid being surprised by an issue with your key fob is to keep an extra in your pocket at all times. You'll never be caught in the middle due to an issue with your key or a lost one. Of course, if you do happen to lose your car key spare, a locksmith will be able to rekey it to work with the ignition in your car. They can also repair any internal damage to the key fob.
Broken Case
The case of the key fob is more than protect the batteries and buttons. The case also houses the circuitry that does all the electrical magic when you press a key fob button. This board takes the signal from your key fob, and then transmits it to your car.
The key fob won't work if this board is damaged. A dead key fob might require reprogramming by a local auto locksmith or dealership.
Another reason your key fob might not be working is that the batteries are dying. This is a quick fix that can be accomplished at home by replacing the battery. You can get an alternative battery at your local auto parts shop or on the internet. These batteries are not only for key fobs.
There are many ways to open a key fob to get inside it, depending on the type. homesite on the internet will identify the type of key fob yours is and the type of battery it requires. You can then buy a new one, take the old one out and put the new one into.
When repairing a broken key fob, the main goal is not to harm the circuit or buttons more. Trying to pry apart the fob using a hard edge like a screwdriver can damage the case or even crack the plastic. A replacement case isn't expensive and you can buy the entire fob including the electronics on eBay or Amazon for less than $40.
If your key fob does not function, make sure you've damaged the circuit board or batteries. If this is not the case, you can have it repaired quickly and cheaply by a professional. Otherwise, it might be the time to purchase an upgrade. Make sure to verify the warranty on any replacement or used fobs purchased online.