Even though we test them a lot, key fobs are not indestructible. They are able to break down in different ways.
Other issues could be more important than the battery being dead. Luckily, most of these issues can be solved with a quick DIY fix at home.
Dead Battery
A dead battery is probably the most common reason a car key fob stops working. Fob batteries tend to drain quickly, especially if they are exposed or cold temperatures, humidity or water. It is a good idea to keep an extra battery in your wallet in case.
The LED light will typically cease to blink when the battery in the car key fob is low. It's also possible that the fob won't function from the same distance as it used to. In this case it might be necessary to reprogram the key fob or even replace it entirely.
It is simple to replace the car keyfob battery. Find out the type of battery that is used. The type of battery you are using should be engraved on the back of your key fob. Google can help you if you're not sure. The key fob can be opened along the seam once you've identified the type of battery. Make use of a flathead screwdriver or even your fingernail, to break the two halves. Take car key fob repairs out, and replace it with a brand new one. Make sure to insert the new battery with the positive (+) side facing towards the buttons on the fob.
Some drivers aren't aware that their fob is dead until they lock or unlock their car, and the buttons don't work anymore. In some cases, this can be solved by reprogramming your fob, however, this can be expensive and time-consuming. Another option is to call roadside assistance and ask them to jump your car and get you back on the road.
If you have tried all of these options and your car still won't start, then it's time to contact an expert. A trained technician can determine if the vehicle's computer system requires reprogramming or the fob simply requires a new battery. They can also recommend a reliable auto repair shop to replace your fob's key. Sometimes an entirely new fob may be the best solution.
Circuit Board Damage
Key fobs aren't indestructible, but it is able to withstand a lot of physical damage. The battery, the circuit board and buttons will all experience their fair amount of wear and tear with time and it's crucial to be on guard and take care of them to ensure that your car key fob functioning efficiently.
The most straightforward thing to do is to ensure that the battery inside your key fob isn't dead. Replace the battery to see if it solves your problem. If not, you may need to open the key fob and clean the contact surfaces. It is sometimes difficult to open certain key fobs due to the fact that they do not have an easy-release mechanism. You may damage your fob by trying take it apart. You can purchase a specific tool to open your key fob, but you must always follow the manufacturer's instructions to avoid damaging it.
Another common problem is a damaged or corrupted circuit board inside the key fob. This could be due to various factors, including dirt or moisture getting into the battery compartment. Issues with software or an unintentional firmware update may also cause this. If your key fob is not functioning, you might want to consider having it reprogrammed. This can be accomplished by a locksmith that specializes in this type of work.
Radio interference is also a possibility. This can happen if there are other wireless devices that transmit on the same frequency your key fob, like radar detectors or home security systems. If this is the case, you should contact the other device manufacturer to ensure that your key fob won't be affected by their signals.
It's also possible that your key fob has an issue with the switch or another electrical component that must be replaced. This is a more difficult fix, but you can find guides online that explain how to do it yourself. Be careful, however, as the circuit board inside your key fob is very small and is prone to breaking if handled roughly. If you're doing it yourself, ensure you make use of an SMT switch that is of high-quality and then solder the switch into place correctly.
Buttons that are worn out
Car key fobs can suffer quite a bit of wear and tear. They are susceptible to being dropped and spend a lot time in your pocket or purse. Sometimes, this can cause the buttons to become worn out or snagged. If this happens it's possible that a simple adjustment will be all that's needed to make it work again.
Modern key fobs come with sensors that detect when they've been press. They're made to do this because they can help lower the risk of thieves stealing your car. If your key fob's buttons don't respond when pushed, that's an indication that they're worn-out and need to be replaced.
Key fobs also contain 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 your internal circuit board is damaged, then the key fob you have may not unlock your vehicle or start the engine. Generally, this kind of damage is caused by water, blunt force or something that scratches the circuit board.
You'll be able to tell that the buttons on your key fob are wearing down when you press the buttons more than usual in order to get them working. Additionally your fob could cease transmitting signals to the car, or have less range than before.
Contact a locksmith immediately when you're unable to use your key fob for your vehicle. They'll be able determine whether the key fob is damaged or your ignition cylinder is worn out.
Luckily, most key fob issues in cars aren't too serious or complex. The best way to ensure you don't get taken by surprise by an issue with your key fob is to have an extra in your pocket at all times. This will ensure that you're never left stranded somewhere due to a lost or malfunctioning key. If you lose your spare key, a professional locksmith can reset it to work with your vehicle's engine. They can also fix any internal damage to your key fob.
Broken Case
The case of the key fob does more than just protect the buttons and batteries. It also houses the circuit board that is responsible for all the electrical magic when you press a button on your key fob. This 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 reprogrammed which is something that your local auto locksmith or the dealership can assist you with.
Batteries could be the reason your key fob's battery not working. The battery can be replaced at your home. You can purchase a replacement battery at the local auto parts store or online. These batteries aren't only intended for key fobs.
Depending on the kind of key fob, there are different ways to open it and get inside. You can determine the kind of battery your key fob uses by conducting a quick online search. You can then buy a new one, take the old one out, and then put the new one in.
The biggest concern when repairing a broken car key fob is that you don't want to damage the circuit board or buttons further. If you attempt to remove a key fob with an edge that is sharp like screwdrivers can damage the case or even scratch the plastic. A replacement case isn't much and you can find the entire fob including the electronics on eBay or Amazon for under $40.
If your key fob does not work, you should check if you've damaged the circuit board or the batteries. If this isn't the situation, you can get it repaired quickly and easily by an expert. In the event that it isn't, it's time to consider an upgrade. Just be sure to check for a warranty on any replacement or used fobs you purchase online.
