The Most Common Car Key Button Repair Mistake Every Beginner Makes

· 5 min read
The Most Common Car Key Button Repair Mistake Every Beginner Makes

Car Key Button Repair

The buttons on car keys are subject to a lot of pressure and are especially vulnerable if frequently used. As time passes, they may be damaged.

There are a few simple fixes that can get your keys working again. However, these techniques carry risks when it comes to changing batteries or altering the key fob. If you're not comfortable performing these things yourself, it's recommended to contact a professional auto locksmith.

Change the Battery

It's possible to replace the battery in the case that your key fob isn't working as it should. You can usually find replacement batteries at any national chain drug store or in the parts department at your car dealership. Some manufacturers will include an extra battery with the car when you purchase it.

It is first necessary to find out the kind of battery is being used in your key fob. This information is typically found on the site of the manufacturer or by examining the key fob. Generally, the most common battery that is used in the key fob is a button cell type similar to the ones used in watches and remote controls. These types of batteries are typically found at stores such as Walgreens and Energizer and are available for purchase for less than $5 for a pack of two.

Once you are aware of the type of battery your key fob uses you can open it and remove the old battery. Most key fobs are constructed with a notch or seam that connects them and can be opened with your fingers, or using an instrument that is flat, such as a screwdriver. After the fob has been opened, the battery will come out, and you can then put in the new one in the same orientation as the previous one. The majority of key fobs are powered by CR2032 3V batteries, which are accessible at a variety of stores that sell AAA and AA batteries.

You can join the two halves together after you have inserted the new battery and test the key fob to make sure that all buttons function correctly. You can test if everything is working properly by pressing the lock and unlock buttons on the key fob while pointing it toward your vehicle. If your car does not respond to the fob, you might need to reprogram the fob to establish wireless connectivity. This is a fairly easy process that requires a phone or other device.

Reprogram your key fob

If your key fob does not work and you believe it needs to be replaced the fact is that it might not require an entirely new battery, but instead the original one must be reset. This procedure is different for each car. To learn  car key repair near me  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.

Modern vehicles require a specific procedure to put the vehicle into "programming mode," which usually involves pressing the power button on the driver's side door or ignition several times while pressing a button on the fob within a certain time frame. This is how the fob communicates its digital identification code to the vehicle, and it stores it in memory. Once the fob is programmed, it can function like an ordinary key.

It's important to note that changing the programming of a key fob will wipe out any other key fobs that had been previously programmed. If you want to keep the other fobs following the first, then they must be reprogrammed quickly and with care.

You can sometimes find replacement batteries for a key fob for your car at hardware stores, big-box retailers or even online. You will need to be aware of your car's make and model before you purchase a fob because it may be difficult to locate the right battery.


A CR editor discovered an battery for her key fob, however, it came from a different vehicle. This meant that while she was able to start the car and open the doors, she wasn't able to lower the windows.

Fortunately, dealers can assist you in this instance, as most of them have the tools needed to reprogram a fob into the specific vehicle. Dealers are required to perform this procedure on certain European automobiles like Audi and BMW due to their unique security features which 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 long as you knew the exact make and model of the car you own.

Replace the Button

If you've tried changing the battery and programming the key fob but not being able to start your car, it may be time to replace the button on the key. The button on the key of your car is subject to a lot of use and jolting and may be damaged or stuck over time. Every time you press the button on your car key fob emits a different code in a sequence that is recognised by the car's receiver. If you attempt to operate your vehicle from a distance without using the correct code could cause it to not be able to recognize you and lock the doors or shut off the engine.

You can purchase replacement buttons online or at many local hardware stores. They are relatively simple to install and open and require only a small amount of clear plastic tape to cover the old button.

Contact an Auto Locksmith

It could be time to seek out the experts when you're having issues with your car's key button. 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 also have the knowledge and experience to handle more complex tasks, such as repairing a broken button or even cutting a replacement key.

The switch on the button for the car key is usually worn out. Overuse and exposure to elements are the main reasons. The switch is usually made of a tough plastic material and has many different switches on the surface. Each of these switches is responsible for activating the specific function you are using the key for. As the switch ages over time, it becomes more difficult to activate these functions. This means that you'll have to press down harder on the switch in order to make it work. This can cause more damage to the switch, thereby reducing its life span.

The easiest way to solve this problem is to replace the battery inside your car key fob. It is easy to find lithium-ion button and coin cell batteries in supermarkets, pharmacies and home improvement stores. Once you've replaced the battery, your key fob should work again.

If the issue persists, it could be that the contacts inside the key fob have worn out. The contacts are made of rubber, and are covered with an electrically conducting film that can wear out. They are exposed to elements while you use the keypad and are constantly exposed to dirt and moisture. They will eventually wear to the point that they are unable to contact with the circuit board or the sensor underneath the keypad.

The dealership can replace the key fob, however it can be expensive and take a lot of time. The other option is to call a local locksmith for your car, who can fix your key fob and save you money.