Car Key Button Repair
The buttons on keys for cars are subjected to a lot particularly if they are often used. In time, they could become faulty.
There are a few simple fixes that will allow your keys back in working order. These methods are not completely safe however. Changing batteries or tampering your key fob can be dangerous. If you're not confident with these methods, it is recommended to seek advice from a professional auto-locksmith.
Change the Battery
It's possible to replace the battery in the case that your key fob doesn't function as it should. You can buy replacement batteries in any national chain drugstore or at the parts department at your local car dealership. Some manufacturers include an extra battery with the car when you purchase it.
The first thing you will need to do is find out which battery is used in your key fob. This information is usually available on the website of the manufacturer or by checking the key fob. The most commonly used battery that is used in the key fob is a button cell type that is similar to the ones used in watches and remote controls. These types of batteries are typically available at stores like Walgreens and Energizer and are available for less than $5 for a pack of two.
You can take the old battery off your key fob after you know the type of battery it has. Most key fobs are constructed with a notch or a seam between them which you can either open with your fingers, or with the flat side of a screwdriver. Once the key fob has been opened, the battery will be released. It is then possible to replace it with the same orientation. Many key fobs are powered by CR2032 batteries. These batteries are available at retailers that sell AAA or AA batteries.
You can join the two halves together after you have inserted the new battery and then test the key fob to ensure that all buttons are functioning correctly. You can verify that everything is working properly by pressing the lock and unlock buttons on the key fob, while pointing it towards your vehicle. If your vehicle is not responding to the key fob, it could be necessary to reprogram your key fob and re-establish an electronic connection between the two. This is a easy process that requires your phone or a different device.
Reprogram your key fob
If your key fob does not function and you believe it needs to be replaced It may not require an entirely new battery, but instead the old one needs to be reset. This procedure is different for every car and the best option is to refer to the owner's manual (usually available in PDF format on the automaker's website) or search YouTube for videos explaining how to accomplish this.

In most modern vehicles, a special procedure is required to put the vehicle into "programming mode". This usually involves pressing the power button several times on the door of the driver or ignition while simultaneously pressing the button on a fob in a time-specific period. This is how the fob transmits its digital identification code to the vehicle, which stores it in the memory. The fob functions as a regular key after it has been programmed.
It's important to note that reprogramming a key fob will erase any other key fobs which have been programmed previously. If you wish to keep the other fobs after the first, then they must be reprogrammed quickly and with care.
You can often find replacement batteries for your car key fob in hardware stores, big-box retailers, or even online. However, you need to know the make and model of your car before purchasing a fob battery because the correct type of battery can be difficult to locate.
A CR editor once found a battery that fit the key fob she owned however it was for a different vehicle. This meant she was able to start her car and unlock the door, but couldn't lower the windows.
Dealers can be extremely helpful in this regard, since they have the equipment to reprogram the fob on a specific vehicle. Dealers are required to carry out this service on some European cars such as Audi and BMW due to their unique security features that can only be reset in the factory. Other dealers we spoke to like those at Toyota and Lexus, were willing to attempt reprogramming the fob in a replacement as they knew the exact model and make of your car.
Replace the Button
If you've tried changing the battery, reprogramming your key fob, but you're still unable to start your car, it might be time to replace the button on your key. The key on your car receives a lot of use and jerking over time and can get stuck or even broken. Each time you press the button on your key fob emits a different code that is recognized by the car's receiver. When you try to operate your vehicle from a distance without the correct code could cause it to not be able to recognize you and lock the doors or shut off the engine.
car key repair cost can buy replacement buttons online or in numerous local hardware stores. They are fairly easy to open up and install and only require a little clear plastic tape to cover the button.
Contact an Auto Locksmith
It's time to consult the experts if you are experiencing problems with the key button on your car. Auto locksmiths specialize in the repair of electronic car keys and their associated locks. These specialists have the tools and expertise to diagnose and fix various issues with your key fob. This includes replacing batteries and changing the programming. They have the expertise and skills to handle more complex jobs, like fixing a damaged key or cutting the replacement key.
The switch inside the button for the car key is usually worn out. Overuse and exposure to elements are the main reasons. The switch is usually made from a hard plastic material and has a variety of switches on the surface. Each switch is able to activate the function that you select with the key. As the switch gets older over time, it becomes harder to turn on each of these functions. You will need to exert more pressure on the switch in order to get it to work. This could further damage the switch and shorten its lifespan.
The most straightforward solution to this issue is to replace the battery inside the key fob of your car. The majority of cars have lithium-ion coin or button cell batteries that you can find in supermarkets, pharmacies and home improvement stores. Once you've replaced the battery, your key fob should work again.
If the problem persists, it could be that the contacts on your key fob are worn out. The contacts are rubber-like and coated with an electric conducting film, which could wear out over time. When you use the key, they are constantly exposed to moisture and dust. In time, they'll get worn down to the point where they no longer make contact with the circuit board or the sensor beneath the keypad.
You can attempt to get the key fob replaced at a car dealership, however it can be costly and can take a long time. You can also contact an expert locksmith in your area who will repair your key fob at an affordable price.