"A Guide To Repair Car Key In 2023 How to Repair Car Key Fobs

Although we put them through many a times keys aren't indestructible. In fact, they can break down in a variety of ways.

Other issues can be more grave than a dead battery. Many of these issues can be solved by a quick fix at home.

Dead Battery

A dead battery is probably the most common reason a car key fob stops working. Fob batteries are known to drain quickly, especially when they are exposed to extreme heat or humid temperatures or even water. It's a good idea keep an extra battery in your wallet just in case.

The LED light will typically cease to blink when the battery in your car key fob is low. It's also possible that your key fob will no longer work at the same distance it did in the past. In this instance it might be necessary to re-program the key fob or even replace it entirely.

Fortunately, replacing a car key fob battery is a simple task. Find out the type of battery used. The type should be engraved on the side of the fob. Google can help if you're not sure. Unlock the key fob across the seam after you have identified the type of battery. Use a flathead screwdriver, or even your fingernail, to break the two halves. Remove the old battery, and replace it with a brand new one. 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 attempt to lock or unlock their vehicle and the buttons don't respond. In some instances this problem can be resolved by reprogramming the fob, however, it can be costly and time-consuming. Another option is to call roadside assistance and see if they are able to jump your car and get you back on the road.

If you've tried every solution but your vehicle doesn't turn on, it's time to contact an expert. A trained technician can tell if your car's computer needs reprogramming, or if the fob simply needs a new battery. They can also recommend a reliable auto repair shop to replace your fob's keys. In the end it is not always the case that a new fob is the most effective solution.

Damaged Circuit Board

A key fob is able to withstand some physical abuse and is not impervious to destruction. The battery, circuit board, and buttons all get their fair amount of wear and tear over time, so it's important 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 the key fob isn't dying. Replace the battery to see if it solves the issue. If not, you'll need to open the key fob and clean the contact surfaces. This can be difficult because some key fobs don't have easy-release mechanisms to open them up and you may damage your fob if you attempt to break it. You can purchase a special tool to open your key fob, but you must always follow the manufacturer's instructions to avoid damaging it.

Another issue that is common is a damaged or damaged circuit board in the key fob. It can be caused by many things, including dirt or moisture getting into the battery compartment. Software issues or even an accident firmware update could be the cause for this. If repair car key fob isn't functioning completely, you should think about having it reprogrammed with a locksmith that specializes in this type of work.

Radio interference is another possibility. It could happen in the event that 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, check with the other manufacturers of your device to make sure that your key fob isn't being affected by their signals.

There may be a need to replace a switch or an electrical component of your key fob. This is a harder fix however, you can find guides online that show you how to fix it yourself. Be cautious, however, as the circuit board inside your key fob is very small and could easily break if handled roughly. If you're doing it yourself, make sure to make use of an SMT switch of good quality and then solder the switch into place in a proper manner.

Buttons that are worn out

Car key fobs are prone to lots of wear and tear. They're prone to being dropped and often are frequently moving around in your purse or pocket. The jolting can cause the buttons to wear down or become stuck. A simple adjustment can fix the issue.

The majority of modern key fobs have sensors on them that detect when they've been used. This is because they lower the chance of someone else stealing your vehicle. If your key fob's buttons aren't responding when pushed, that's an indication that they're worn-out and need to be replaced.

Key fobs also contain a circuit board inside them which transmits signals to your car. The signals include unlock and lock commands and instructions to start your engine. If your internal circuit board is damaged, then your key fob might not unlock your vehicle or start the engine. This kind of damage is usually caused by blunt force or water.

If you have to press the buttons harder than usual in order to make them function the key fob buttons are wearing out. Your fob might also stop sending a signal to your car or have a lower range.

If you're unable to get your key fob to unlock or start your car, it's important to contact an emergency locksmith in your area. They'll be able to determine whether the key fob itself is damaged or your ignition cylinder is worn out.


Luckily, most car key fob issues aren't a major or difficult issue. The best way to avoid getting taken by surprise by an unresponsive key fob is to keep an extra key in your possession at all times. You'll never be stranded due to an unresponsive or lost key. If you do lose your car key spare A locksmith can change the key to ensure it is compatible with the ignition of your car. They'll also be able fix any internal damage that's been caused to your key fob.

Broken Case

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

Your key fob won't work if the board is damaged. Sometimes, a key fob that is dead can be reprogrammed which is something that your local auto locksmith or the dealership can help you with.

Another reason your key fob may not be working is because the batteries are not working. This is a quick fix that you can do 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 intended for key fobs.

There are many ways to open up the key fob and go inside it, based on the type. You can determine the kind of battery your key fob uses by doing a quick online search. From there, you can buy an alternative and then simply pop the old one out and the new one in.

When repairing a broken key fob, the main concern is not to damage the circuit or buttons more. If you try to pry off the key fob with an instrument like a screwdriver or any other sharp edge, it can crack the plastic or break the case. A replacement case is inexpensive and you can find an entire fob, including the electronics 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 the batteries. If this isn't the case, a professional can fix it quickly and inexpensively. Otherwise, it might be the time to purchase an upgrade. Make sure you check for a warranty on any replacement or used fobs you buy on the internet.