How to Repair Car Key Fobs
Key fobs can be damaged even if we use them frequently. They can break down in different ways.
Other issues could be more important than a dead battery. Fortunately, the majority of these can be fixed by a simple DIY fix at home.
Dead Battery
A dead battery is likely the most common reason the car key fob stop functioning. Fob batteries can be drained quickly, particularly if they're exposed to extreme temperatures, humidity or water. It's a good idea keep an additional fob battery in your wallet in case.
It is easy to tell the moment the battery in your car key fob is depleted because the LED light will stop glowing. The fob may be unable to function from the same distance that it used to. In this case it might be necessary to re-program your key fob or replace it completely.
Fortunately the replacement of a car key fob battery is simple. Find out the kind of battery used. The type of battery should be stamped on the back of your key fob. Google can assist you in case you're unsure. Unlock the key fob along the seam once you have identified the battery type. Utilize a flathead screwdriver or even your fingernail, to separate the two halves. Remove the old battery, and replace it with a brand new one. Be sure to insert the new battery with the positive (+) side facing upwards towards the buttons in the fob.
Some drivers don't even realize that their fob has died until they lock or unlock their car and the buttons no longer work. This can be fixed by reprogramming the fob. However, it can be costly and time-consuming. Another option is to contact roadside assistance and see if they can jump your car and get you back on the road.
If you've tried both solutions and your vehicle still won't start, it's time to speak with an expert. A trained technician will be able to determine whether your vehicle's computer system requires reprogramming or the fob simply requires an upgrade in battery. They can also suggest an auto shop that will replace your key fob. Sometimes, however, a new fob could be the best option.
Damaged Circuit Board
A key fob is not indestructible, but it can withstand a lot of physical damage. The battery, circuit board and buttons are all susceptible to wear and tear. It is essential to take care of these parts to ensure that your key fob is in good condition.
The easiest thing to check is that the battery in your key fob isn't dead. Replace the battery to determine if it resolves your problem. If not, you'll require opening the key fob and clean the contact surfaces. This can be tricky since some key fobs don't have a release mechanism that is easy to open them up and you could end up damaging your key fob if try to force it apart. You can purchase a special tool to open your key fob, however you should always adhere to the manufacturer's guidelines to avoid damaging it.
Another problem that is frequently encountered is a damaged or faulty circuit board on the key fob. This could be due to various factors, including dirt or moisture entering the battery compartment. Software issues or even an unintentional firmware update may be the cause of this. If your key fob is not functioning, you might be interested in having it replaced. This can be accomplished by a locksmith who is skilled in this kind of work.
Radio interference is another possibility. This could happen if you have other wireless devices around that transmit at the same frequency, for example, radar detectors or home security systems. If this is the case you need to contact the manufacturer of the other device to make sure that your key fob will not be affected by their signals.
It's also possible that your key fob is equipped with a bad switch or other electrical component that needs to be replaced. This is a harder fix however, there are guides online that show you how to do it yourself. You should be careful when doing this, however, because the circuit board that is inside your key fob is very small and is prone to breaking if handled with care. If you decide to do this yourself, make sure to use a good quality SMT switch and solder it to the correct place.
Buttons that are worn out
Car key fobs are subject to a lot of wear and wear and tear. They are more prone to being lost and spend a significant amount of time being tossed around in your pocket or purse. This jostling can sometimes cause the buttons to wear out or become stuck. A simple adjustment can fix the issue.
Modern key fobs are equipped with sensors that are able to detect when they have been hit. They're designed to do this because they can help lower the risk of thieves stealing your car. If the buttons on your key fob don't work when you press them, 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, as well instructions to start the engine. If the circuit board inside your vehicle is damaged, your key fob might not unlock your vehicle or even start the engine. Typically, this type 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 wearing down when you press the buttons more than normal to get them to function. Additionally, your fob may cease transmitting signals to the car or have less range than it did prior to.
If you're not able to get your key fob to unlock or start your car, you need to call a locksmith near you immediately. They'll be able determine whether the key fob itself is damaged or your ignition cylinder is worn out.
Fortunately, most key fob issues in cars aren't serious or complicated. The best way to avoid being surprised by an unresponsive key fob is to keep a spare in your possession at all times. You won't be left stranded due to a malfunctioning or lost key. If you lose your spare key, a professional locksmith can reset it to work with your car's engine. They'll also be able to fix any internal damage that may have occurred on the key fob.
Broken Case
The case of a key fob does more than protect the buttons and batteries. It also houses the circuit board that is responsible for doing all of the electrical magic when you press a button on your key fob. The circuit board receives the signal from your key fob and sends it to your car.
Your key fob will not work if the board is damaged. Sometimes, a key fob that is dead can be reset which is something your local auto locksmith or the dealership can help you with.
Another reason why your key fob might not be working is because the batteries are dying. This is a simple solution that can be done at home by replacing the battery. You can get a replacement battery at the local auto parts store or online. These batteries aren't only intended for key fobs.
There are many ways to open a key fob to get inside it, depending on the kind. linked here can find out what type of battery your key fob has by conducting a quick internet search. You can then purchase a new replacement and pop the old one out and then put the new one in.
The main concern when you repair a broken car key fob is that you don't want to harm the circuit board or buttons further. When you try to break a key fob with a hard edge like a screwdriver could damage the case or even scratch the plastic. A replacement case isn't expensive and you can buy the entire fob including the electronic components on eBay or Amazon for less than $40.
If your key fob does not work, you should check if you have damaged the circuit board or batteries. If that's not the case, a professional can repair it quickly and inexpensively. If not, it might be time to replace the fob. Be sure to look for a warranty on any used or replacement fobs you buy on the internet.