Car Key Button Repair

The buttons on the car keys are exposed to a lot and are especially vulnerable if used frequently. This can result in them becoming faulty over time.

There are a few quick fixes that will allow your keys back in working order. However, these techniques carry risks when it comes to changing batteries or altering the key fob. If you are not comfortable with these methods, it's recommended that you consult with a professional auto-locksmith.

Change the Battery

If you notice that your key fob no longer working as it should, it may be time to replace the battery. You can typically purchase replacement batteries from any chain drug store or the parts department of your car dealership. Some manufacturers include an extra battery in your car when you buy it.

You will first need to find out what kind of battery is used in your key fob. The manufacturer may have this information on their website or you can look it up on the key fob's specifications. Generally speaking, the most popular battery used in key fobs is a button cell type that is similar to the ones used in watches and remote key repairs controls. These types of batteries are typically found at stores such as Walgreens and Energizer and can be bought at less than $5 for a pack of two.

You can remove the old battery from your key fob once you know which type of battery it is using. Most key fobs are designed with a notch or seam where they join together which you can either open by using your fingers, or by 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 insert the new one with the same orientation that the old one. Most key fobs use CR2032 3V batteries, which are readily available at many retailers that sell AAA and AA batteries.

After the new battery has been in place after which you can take the two halves of the key fob together and test it to ensure that all buttons are functioning correctly. You can determine if everything is working properly by pressing the lock and unlock button on the key fob while pointing it toward your vehicle. If your car isn't responding to the keyfob, you may require reprogramming the fob to establish a wireless connection. Fortunately, this is a relatively easy process and only requires the use of a smartphone or another device to accomplish this.

Reprogram your key fob

If you're having trouble with your key fob and believe it needs a new one however, it may not be required to replace it. Instead the battery you have may require reprogramming. This procedure is different for every mobile car key repair and the best option is to read the owner's manual (usually available in PDF form on the website of the automaker) or search YouTube for videos that explain how to accomplish this.

In modern vehicles, a specific procedure is required to put the vehicle into "programming mode". This usually involves pressing the power button a few times on the driver's door or ignition, while simultaneously pressing the button on a fob within a specific time frame. This is how the fob transmits its digital identification code to the vehicle, which stores it in the memory. Once the fob is programmed, it can behave as normal keys.

It is important to remember that reprogramming a key fob will wipe out any other key fobs that had been programmed previously. Therefore, if you'd like to keep other fobs, they must be carefully and quickly reprogrammed after the first one.

Sometimes, you can find replacement batteries for car key fobs at hardware stores, major retailers, or even on the internet. You will need to know the make and model before you purchase a key fob since it isn't easy to find the right battery.

A CR editor found a battery for her key fob however, it came from another vehicle. This meant that, while she could start the car and unlock the doors, she was not able to lower the windows.

Luckily, dealers can assist you in this instance, as most of them have the tools needed to reprogram a fob for specific cars. Certain European automobiles, like those manufactured by Audi and BMW generally require you to go to a dealer to get this service because they use specialized security features that can only be reset by the manufacturer. Other dealers we spoke with such as those at Toyota and Lexus, were willing to reprogramme a replacement fob as provided you know the exact make and model of the car you own.

Replace the Button

If you've tried changing the battery, reprogramming your key fob, and still haven't been able to start your car it could be time to replace the button on the key. The button on your car key is subjected to a lot of pressure and jostling, and it can get damaged or stuck over time. Each press of the button on your key fob emits a different code in a sequence that is recognized by the car's receiver. When you try to operate your car from a distance and not using the proper code could cause it to not recognize you and shut the doors or shut off the engine.

You can buy replacement buttons online or at several local hardware stores. They are relatively simple to open and install and require just a bit of clear plastic tape to cover the button.

Contact an Auto Locksmith

If you're having trouble with the car key button it could be time to call in the experts. Auto locksmiths specialize in the repair of electronic car keys and their associated locks. They are equipped with the tools and expertise to diagnose and fix various issues with your key fob. This includes replacing batteries and reprogramming them. They are equipped with the knowledge and skills to handle more complex tasks, like fixing a broken key or cutting an alternative key.

The switch on the button for the car key is often worn out. The use of the switch and exposure to elements are the primary reasons. The switch is usually made from a hard plastic and has many different switches on its surface. Each switch is able to activate the function that you select with the key. As the switch ages over time, it becomes harder to turn on each of these functions. As a result, you'll have to press down more force on the switch to make it work. This could cause more damage to the switch, reducing its longevity.

The most straightforward solution to this issue is to replace the battery on your car's key fob. Many models of car use lithium-ion button or coin batteries that you can find at pharmacies, supermarkets and home improvement stores. Once you've replaced the battery the key fob will be working again.

If the issue persists, it could be that the contacts inside your key fob are worn out. The contacts are rubber-like and coated with an electric conducting film that can wear out over time. As you use the key they are exposed to moisture and dust. In time, they'll become worn to the point where they're no longer in contact with the circuit board or sensor underneath the keypad.

The dealer can replace the key fob, but it can be expensive and take a long time. You can also call an emergency locksmith who will repair your key fob for an affordable price.