The buttons on keys for cars are exposed to a lot and are especially vulnerable if used frequently. As time passes, they may become damaged.
There are a few quick fixes that can get your keys working again. These solutions are not completely safe however. Making changes to batteries or tampering with the key fob could be risky. If you're not confident doing these yourself, it's recommended to consult a professional auto locksmith.
Change the Battery
It could be time to replace the battery in your key fob if it isn't working as it should. You can purchase replacement batteries at any drugstore chain nationwide or in the parts department of your local car dealership. Some manufacturers even include an extra key fob battery in the packaging when you purchase your car from them.
You will first need to find out the kind of battery is being used in your key fob. The manufacturer may have this information on their website, or you can check the actual key fob. The most commonly used kind of battery that is found in keyfobs is the button cell similar to the ones used in remotes and watches. These kinds of batteries are commonly sold at places like Walgreens and Energizer, and are available for purchase for less than $5 for a pack of two.
You can take the old battery off your key fob once you know what kind of battery it has. You can open most key fobs using your fingers or a flat tool, like a screwdriver at the seam or notch where they join. After the key fob is been opened, the battery will pop out. Then, you can replace it with the same orientation. A lot of key fobs are powered by CR2032 batteries. These batteries can be found at stores that sell AAA or AA batteries.
Once the new battery is installed, you can snap the two halves of the key fob back together and check that all buttons are functioning properly. Pressing the locks and unlock buttons on the key fob while pointing it at your vehicle will allow you to determine if everything is functioning exactly as it should. If your vehicle still does not respond to the fob, you might require reprogramming the fob and establish wireless connectivity. It's quite simple and requires only the use of your phone or other device to perform the procedure.
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If you're having issues with your key fob and believe that it's time to get a new one It may not be necessary to replace it. Instead the battery you have may require reprogramming. This procedure differs for each vehicle. To find out how to go about it, consult your owner's manual. It's typically available in PDF format on the automaker's website. You can also search YouTube for videos.
In the majority of modern vehicles, a specific procedure is required to put the vehicle into 'programming mode'. This typically 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 sends its digital identification code to the car, which saves it in the memory. After the fob is programmed, it will function like an ordinary key.
Reprogramming a fob will erase any previous keyfobs. If you wish to keep the other fobs after the first, then they must be reprogrammed quickly and carefully.
You can often find replacement batteries for a car key fob in hardware stores, big-box retailers or online. However, you must know the make and model of your vehicle prior to purchasing a fob battery because the right kind can be difficult to locate.
A CR editor discovered an battery for her key fob, however, it was from an entirely different vehicle. This meant she could start her car and unlock the door, but couldn't lower the windows.
Dealers can be a great resource in this case, as they have the tools to reprogram the fob on a specific vehicle. Some European automobiles, like those made by Audi and BMW, will usually require you to go to an authorized dealer for this service due to the fact that they have 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 an original fob so they knew the exact make and model of your car.
Replace the Button
If you've tried changing the battery, or reprogramming your key fob, but you're still unable to start your car, it might be time to replace that button on your key. The button on the key of your car is subject to a lot of pressure and jostling, and it can become stuck or damaged over time. Every time you press the button on your key fob, the unique code is sent in a sequence which the receiver in the vehicle can recognize. If you attempt to operate your vehicle from a distance and not using the correct code could cause it not to recognise you and then lock the doors or shut off the engine.
You can buy replacement buttons online or at many local hardware stores. They are easy to open and install and require only a small amount of clear plastic tape to cover the old 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 specialise in the repair of electronic car keys as well as their associated locks. They are equipped with the tools and know-how to diagnose and fix various issues with your key fob. This includes replacing batteries and changing the programming. They have the knowledge and skills to handle more complicated tasks, such as fixing a damaged key or cutting an alternative key.
One of the most frequent reasons for a car key button to stop working is that the switch inside it has worn out. The use of the switch and exposure to elements are the main reasons. The switch is typically made from a hard plastic and has a variety of switches that are located on the surface. Each of these switches is responsible for activating the specific function that you use the key to activate. As the switch wears out over time, it becomes more difficult to turn on each of these functions. You will need to exert more pressure on the switch in order to activate it. This could further damage the switch and decrease its lifespan.
The most straightforward solution to this issue is to replace the battery on your car key fob. It is easy to locate lithium-ion button or coin cell batteries in pharmacies, supermarkets and home improvement stores. After replacing the battery, your key fob should be working again.
If the problem persists it may be that your key fob's contacts have worn out. The contacts are made of rubber and coated with an electric conducting film, which can wear out over time. As you use the key they are continuously exposed to moisture and dust. Eventually, they will get worn down to the point that they are no longer in contact with the circuit board or sensor underneath the keypad.
The dealership can replace your key fob, however it can be expensive and take a long time. The other alternative is to contact an auto locksmith in your area who will be able to fix your key fob and save you money.
