Car Key Button Repair
Car key buttons undergo lots of abuse particularly when they are used regularly. This could lead to them becoming damaged over time.
There are a few easy solutions that will get your keys working again. However, relevant website come with the potential for dangers when changing batteries or altering the key fob. If you are not comfortable with these methods, it is best to consult an expert auto-locksmith.
Change the Battery
It's possible to change the battery if your key fob isn't working as it should. You can typically purchase replacement batteries at any national chain drug store or in the parts department of your car dealership. Some manufacturers even include an extra key fob battery in the packaging when you purchase a car from them.
First, you'll need to find out what type of battery is used in your key fob. The manufacturer will likely have this information on their website or on the actual key fob. The most popular type of battery found in a keyfob is the button cell that is like the ones found in watches and remotes. These batteries are available at Walgreens, Energizer and other stores for less than $5 per pack of two.
You can remove the old battery from your key fob after you know what kind of battery it uses. The majority of key fobs are made with a notch or seam where they join together, which you can open with your fingers, or by using an instrument that is flat, such as a screwdriver. Once the key fob has been opened the battery will pop out. It is then possible to replace it with the same design. A lot of key fobs are powered by CR2032 batteries. These batteries are available at stores 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 make sure that all buttons function properly. You can test if everything is functioning properly by pressing the lock and unlock button on the key fob, while pointing it toward your vehicle. If your vehicle doesn't respond to the key fob, you may have to reset the fob and establish an internet connection. Fortunately, this is a relatively easy process and requires only the use of your smartphone or another device to do so.
Reprogram your key fob
If you're having trouble with your key fob and think that it's time to get a new one however, it may not be required to replace it. Instead the battery you have may need to be reprogrammed. This procedure differs for each car. To find out the procedure go through the owner's manual. It's typically available in PDF format on the automaker's website. You can also search YouTube for videos.
The majority of modern automobiles require a particular procedure to put the vehicle in 'programming mode,' which usually involves pressing the power button on the driver's side door or ignition a few times while pressing the fob's button within a specified time. The fob sends its digital identification code to the vehicle, and then will save it. The fob will work like a regular key after it has been programmed.
Reprogramming a keyfob will erase any previous keyfobs. Therefore, if you'd like to keep other fobs, they should be carefully and quickly reprogrammed following the initial one.

There are a few replacement batteries for your car key fob at hardware stores, big-box retailers or online. But, it is important to be aware of the model and make of your car prior to purchasing a battery for your fob because the correct type of battery can be tricky to find.
A CR editor found the battery for her key fob however, it was from another vehicle. This meant that while she was able to start the car and open the doors, she wasn't able to lower the windows.
Dealers can be of great assistance in this regard, since they have the equipment necessary to reprogram the fob on a specific vehicle. Dealers are required to perform this service on certain European cars such as Audi and BMW because they come with specialized security features which can only be reset by the manufacturer. Some dealers, such as those at Toyota and Lexus were willing to reprogramme the key fob in a replacement provided you knew the exact model and make of your car.
Replace the Button
If you've tried changing the battery, reprogramming your key fob, and you're still unable to start your car, it's time to replace that button on your key. The button on the car key is subject to a lot of pressure and jostling, and it can get damaged or stuck over time. Every time you press the button on your car key fob releases a distinct code in a sequence that is recognised by the car's receiver. If you try to operate your vehicle from a distance, it may not recognise you. It could lock the doors or shut off the engine.
You can purchase replacement buttons online or in several local hardware stores. They are fairly easy to open and install and require just a bit of clear plastic tape to cover the button.
Contact an Auto Locksmith
If you're experiencing issues with your car key button, it may be time to consult the experts. Auto locksmiths are experts in the repair of electronic keys and locks. These specialists have the knowledge and tools necessary to diagnose and fix a range of issues that may arise with your key fob including replacing batteries and changing the programming. They are equipped with the knowledge and expertise to tackle more complex jobs, like repairing a broken key or cutting a replacement key.
One of the most common reasons for a car key switch to stop working is because the switch inside has worn out. The use of the switch and exposure to elements are the primary reasons. The switch is constructed of hard plastic and has multiple switches on its surface. Each of these switches activates the function that you select with the key. As the switch wears out over time, it becomes harder to activate these functions. You will need to exert more pressure on the switch in order to make it work. This can further damage the switch and reduce its lifespan.
Replace the battery in your key fob. You can locate lithium-ion button or coin cell batteries in supermarkets, pharmacies and home improvement stores. Your key fob should work once you have replaced the battery.
If the issue persists, it could be because your key fob's contacts have worn out. The contacts are made of rubber, and covered with an electrically conducting film that wears out. When you use the keypad, they are exposed to dust and moisture. They will eventually wear to the point where they can no longer make contact the circuit board or the sensor underneath the keypad.
You can attempt to get the key fob replaced at a vehicle dealership, but this could be expensive and could take quite a while. You can also call an emergency locksmith who can repair your key fob at a lower price.