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Car Key Button Repair

Car key buttons take a lot of abuse, especially if used frequently. This could lead to them becoming faulty over time.

Fortunately, there are several quick solutions to make your keys work again. However, these techniques carry risks when it comes to changing batteries or tampering with the key fob. If you're not comfortable performing these yourself, it's recommended to contact an expert auto locksmith.

Change the Battery

If you notice that your key fob not working as it should, it could be time to replace the battery. You can buy replacement batteries in any chain drugstore nationwide or in the parts department at your local dealership for cars. Some manufacturers even include an extra key fob battery in their packaging when you purchase a car from them.

You will first need to determine the 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 actual key fob. The most common type of battery in the keyfob is the button cell similar to those found in watches and remotes. These batteries are available at Walgreens, Energizer and other stores for less than $5 per pack of two.

Once you know what kind of battery your key fob is using then you can open it and remove the old battery. It is possible to open most key fobs by using your fingers or a flat tool, like a screwdriver, at the seam or notch at which they join. Once the fob is opened, the battery will come out, and you can then put in the new one in the same orientation as the old one. The majority of key fobs are powered by CR2032 3V batteries, which are easily available at numerous retailers that sell AAA and AA batteries.

After the new battery has been installed After that, you can connect the two parts of the key fob back together and check that all buttons work correctly. Pressing the lock and unlock buttons on the key fob while it is pointed at your vehicle will help you determine whether or not everything is functioning as it should be. If your vehicle still isn't responding to the key fob, you may have to reset the fob to establish an internet connection. It's quite simple and only requires the use of your phone or other device to accomplish this.

Reprogram your key fob

If your key fob does not function and you believe it's time to replace it the fact is that it might not require a new battery, but instead the old one has to be reprogrammed. This process varies by car and the best option is to read the owner's manual (usually available in PDF format on the site of the automaker) or look on YouTube for videos explaining how to accomplish this.

In the majority of modern vehicles, a specific procedure is required to put the vehicle in 'programming mode'. This usually involves pressing the power button multiple 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 sends its digital identity code to the car, which saves it in its memory. Once try this is programmed, it will function like a normal key.

Reprogramming a fob will erase any previous keyfobs. Therefore, if you'd like to keep other fobs, they need to be carefully and swiftly reprogrammed following the initial one.

There are a few replacement batteries for your key fob for your car at hardware stores, big-box retailers, or on the internet. However, you need to know the make and model of your car before purchasing a battery for your fob because the correct type of battery can be difficult to locate.

A CR editor found an battery for her key fob, but it was from another vehicle. This meant she could start her car and unlock the door, but she couldn't lower the windows.


Fortunately, dealers can assist in this case, as most of them have the equipment needed to reprogram a fob into the specific vehicle. Dealers are required to carry out this service on certain European automobiles like Audi and BMW because they come with specialized security features which can only be reset in the factory. Some dealers, like those at Toyota and Lexus were willing to reprogramme an alternative key fob in the event that you could identify the exact model and brand of your car.

Replace the Button

If you've tried changing the battery, or reprogramming your key fob, and you're still unable to start your car, it's time to replace that button on the key. The button on your car key is subjected to a lot use and jostling, and it can 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 recognized by the receiver inside the vehicle. When you try to operate your vehicle from a distance and not using the correct code can cause it to not recognize you and lock the doors or shut off the engine.

You can purchase replacement buttons online or in many local hardware stores. It is simple to install them and they are also very simple to open.

Contact an Auto Locksmith

It could be time to consult the experts when you're having issues with your car's key switch. Auto locksmiths specialise in the repair of electronic car keys and their associated locks. They have the expertise and tools required to recognize and fix a range of issues with your key fob including replacing batteries and changing the programming. They are equipped with the knowledge and skills to handle more complicated tasks, such as repairing a broken key or cutting an alternative key.

The switch in the button for the car key is often worn out. This is due to excessive use and exposure to the elements. The switch is typically constructed of a tough plastic material and has a variety of switches that are located on the surface. Each switch is responsible for activating a specific function that you use the key to activate. As the switch gets older over time, it becomes harder to activate these functions. You will have to apply more pressure to the switch in order to activate it. This could cause more damage to the switch, decreasing its longevity.

The easiest way to solve this problem is to replace the battery in your car key fob. You can find lithium-ion button and coin cell batteries in supermarkets, pharmacies and home improvement stores. After replacing the battery your key fob should work once more.

If the issue persists, it could be that the contacts on the key fob have 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. Eventually, they will become worn until they're no longer in contact with the circuit board or the sensor beneath the keypad.

The dealership can replace your key fob, but it's costly and take a long time. Another option is to call an auto locksmith in your area, who can fix your key fob and save you money.

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