How to Repair Car Key Fobs
Even though we use them numerous times, key fobs are not indestructible. They can break down in various ways.
While the most common issue is a dead battery however, other issues could be more grave. Many of problems can be fixed with a simple fix at home.
Dead Battery
A dead battery is the most frequent reason for a key fob not working. Fob batteries are prone to draining quickly, especially when they're exposed to extreme temperatures, humidity or water. Keep an extra battery in your wallet in case you need it.
It is easy to tell the moment your car key fob's battery is depleted by the fact that the LED light will cease to glow. It's also possible that your key fob will no longer work from the same distance it did in the past. In this scenario it could be necessary to re-program your key fob or even replace it entirely.
It is easy to replace the battery in a car keyfob. First, find out what type of battery is used. The type of battery should be engraved on the back of your key fob. If you are not sure, doing a quick Google search can help. Once you've identified the kind of battery you want, open the key fob near the seam. You will need to use a small flathead screwdriver or your fingernail to break the two halves. Then, take out the battery that was removed and replace it with 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 don't even realize that their fob has gone out of service until they lock or unlock their vehicle and the buttons no longer work. This can be corrected by reprogramming the fob. However it can be time-consuming and expensive. Another option is to call roadside assistance and see if they are able to jump your vehicle and get you back on the road.
If you've tried every solution but your vehicle doesn't start, it's time to call an expert. 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 shop that will replace the key fob. Sometimes an entirely new fob could be the best option.
Circuit Board Damage
Key fobs can withstand a lot of physical abuse and isn't indestructible. The battery, the circuit board, and buttons all get their fair amount of wear and tear with time, so it's important to be on guard and take care of them to keep your car key fob functioning well.
The easiest way to test is to ensure that the battery inside your key fob isn't dead. If it is then replace the battery and check if it fixes your problem. If not, you might need to open the key fob and clean the contact surfaces. It isn't easy to open some key fobs due to the fact that they don't have an easy-release mechanism. You can cause damage to your fob by trying to break it. You can buy a special tool to open your key fob, however it is recommended to adhere to the manufacturer's guidelines to avoid damaging it.
A damaged or damaged key fob circuit board is another common problem. It can be caused by many things, including dirt or moisture getting into the battery compartment. Issues with software or an accidental firmware update can be the cause of this. If your key fob is not working, you may want to consider having it changed. This can be done by a locksmith who specializes in this type of work.
Radio interference is another possible cause. It could happen if are other wireless devices operating at the same frequency as your key fob, for instance radar detectors, home security systems. If this is the case, check with the other manufacturers of the device to ensure that your key fob isn't being affected by their signals.
It's also possible that your key fob may have a bad switch or other electrical component that should be replaced. This is a difficult fix however, there are guides online that explain how to fix it yourself. It is important to be cautious when doing this, though it is important to be careful, since the circuit boards that are inside the key fob are tiny and are susceptible to breaking in the event of rough handling. If you decide to do this yourself, be sure to use a good quality SMT switch and then solder it to the correct place.
Buttons that are worn out
Car key fobs are prone to lots of wear and wear and tear. They are more prone to being lost and spend a significant amount of time being jostled in your purse or pocket. The jolting can cause the buttons to wear out or become stuck. In this case an easy adjustment could be all it takes to get it working again.
The majority of modern key fobs have sensors on them that detect when they've been used. They're designed to detect this to reduce the likelihood of thieves stealing your car. If your key fob's buttons aren't responding when pushed it's 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 commands to unlock and lock your car, and instructions to start the engine. If your internal circuit board is damaged, your key fob might not be able to unlock your vehicle or even start the engine. Typically, this type of damage is caused by water, force blunt or a scratch on the circuit board.
If you have to press the buttons more than usual in order to make them function If this is the case, then your key fob buttons are becoming worn out. Your fob might also stop sending a signal to your car or have a lower range.
Contact a locksmith immediately in the event that you are not able to use the key fob to start your vehicle. They'll be able to determine whether the key fob is damaged or the ignition cylinder has worn out.
Luckily, most car key fob problems aren't serious or complicated. The best way to avoid getting caught off guard by a malfunctioning key fob is to keep an extra key in your possession at all times. You'll never be stranded because of an unresponsive or lost key. If you do lose your car key spare, a locksmith will be able to change the key to work with your car's ignition. They'll also be able fix any internal damage that may have occurred on your key fob.
Broken Case
The case of your key fob provides more than just protection for the buttons and battery. The case also houses the circuitry that does all the electrical magic every time you press the button on your key fob. The circuit board relays the signal from your keyfob to your car.
Your key fob won't work if this board is damaged. A dead key fob may only need to be reprogrammed by your local auto locksmith or dealership.
Another reason your key fob may not be functioning is that the batteries are 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 on the internet or at your local auto parts shop since the batteries aren't limited to key fobs.
There are many ways to open a key fob and get inside it, based on the type. You can find out what kind of battery your key fob is using by doing a quick online search. You can then buy a new one, take the old one out and then put the new one in.
The main concern when you repair an old car key fob is that you don't want to cause damage to the circuit board or buttons further. If you attempt to pull away the key fob with the screwdriver or another sharp edge, it can crack the plastic or break the case. A replacement case isn't much and you can purchase a complete fob assembly including the electronics on eBay or Amazon for under $40.
If your key fob isn't working Check to see if the batteries are depleted or whether the circuit board has been damaged. If this isn't the situation, a professional could repair it quickly and cost-effectively. If not, it might be time to replace the fob. Make sure to verify the warranty of any replacement or used fobs that you purchase online.