Car Key Button Repair
Car key buttons take lots of abuse particularly when they are used regularly. This can result in them becoming faulty over time.
There are a few simple fixes that can get your keys working again. These methods are not without risk however. Changing batteries or tampering your key fob's security can be risky. If you're not comfortable with these methods, it is best to consult an expert auto-locksmith.
Change the Battery
It could be time to replace the battery in the case that your key fob no longer works as it should. You can buy replacement batteries at any chain drugstore nationwide or in the parts department of your local car dealership. Some manufacturers will even include an extra key fob battery in their packaging when you purchase your car from them.
The first thing you'll need to determine what battery is used in your key fob. The manufacturer will likely have this information on their website or you can look it up on the actual key fob. The most common type of battery found in the keyfob is the button cell similar to the ones used in watches and remotes. These kinds of batteries are typically sold at places like Walgreens and Energizer, and can be bought for less than $5 for a pack of two.
Once you know what kind of battery your key fob uses, you can remove it and remove the old battery. The majority of key fobs are made with a seam or notch that connects them, which you can open by using your fingers or with an instrument that is flat, such as a screwdriver. Once the fob is opened, the battery will pop right out and you can then put in the new one in the same orientation that the old one. Most key fobs use CR2032 3V batteries, which are readily accessible at a variety of stores that sell AAA and AA batteries.
You can put the two halves back together after you have inserted the new battery and test the key fob to ensure that all buttons are functioning properly. Pressing the locks and unlock buttons on the key fob while pointing it towards your vehicle will help determine whether or not everything is functioning exactly as it should. If your vehicle is not responding to the key fob, it might be required to reprogram the key fob and re-establish a wireless connection between the two. This is a relatively straightforward process that requires your phone or a different device.
Reprogram the Key Fob
If you're experiencing issues with your key fob and believe it's time to replace it, it might not be necessary to replace it. Instead the battery you have may need to be reprogrammed. This procedure is different for every car and the best option is to refer to the owner's manual (usually available in PDF form on the site of the automaker) or search YouTube for videos that explain how to do this.
In most modern vehicles, a special procedure is required to put the vehicle in "programming mode". This typically involves pressing the power button multiple times on the driver's door or ignition while simultaneously pressing a button on the fob within a time-specific period. The fob transmits its unique digital identification code to the vehicle, which then will save it. The fob functions as normal keys once it is programmed.
Reprogramming a fob will erase any previous keyfobs. Therefore, if you wish to keep other fobs, they should be carefully and quickly reprogrammed following the initial one.
Sometimes, you can find replacement batteries for car key fobs at hardware stores, large retailers, or even online. It is important to know your car's model and make prior to deciding to purchase a fob as it isn't easy to find the right battery.
A CR editor found a battery for her key fob however, it was from a different vehicle. This meant she was able to start her car and unlock the door, but she was unable to lower the windows.
Fortunately, dealers can help in this situation, as most of them have the equipment needed to reprogram a fob for the specific vehicle. Some European vehicles, such as the ones manufactured by Audi and BMW, will usually require a dealer to get this service since they utilize specific security features that can only be reset by the manufacturer. Certain 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 the car you own.
Replace the Button
If you've tried changing the battery, or reprogramming your key fob, but still can't start your car it's time to replace the button on your key. The car key button gets a lot of use and jerking over time and can sometimes become stuck or broken. Each time you press the button on your key fob an individual code is sent in a pattern that the vehicle's receiver can recognize. When you try to operate your car from a distance without the correct code could cause it to not be able to recognize you and car key circuit board repair then lock the doors or shut off the engine.
You can purchase replacement buttons online or at many local hardware stores. They are easy to open and install and only require a little clear plastic tape to cover the button.
Contact an Auto Locksmith
If you're having trouble with the car key button, it may be time to call in the experts. Auto locksmiths specialize in the repair of electronic car keys as well as their associated locks. They have the experience and tools required to recognize and fix a range of issues that may arise with your key fob including replacing batteries and reprogramming them. They also have the skills and experience to handle more complicated jobs like fixing a broken button or even cutting a new replacement key.
The switch on the car key button is usually worn out. This is caused by overuse and exposure to the elements. The switch is made from an extremely hard plastic with several switches on its surface. Each of these switches is responsible for activating the particular function you are using the key to activate. As the switch gets older 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 further damage to the switch and decrease the life span of the switch.
Replace the battery in your key fob. You can find lithium-ion button and coin cell batteries at pharmacies, supermarkets and home improvement stores. After you've replaced the battery the key fob will work again.
If the problem persists it could be because the contacts inside your key fob have become worn out. The contacts are made of rubber and coated with an electric conducting film, which can wear away over time. They are exposed to the elements while you use the keypad which means they are constantly exposed to dirt and moisture. They'll eventually wear down to the point that they can no longer make contact the circuit board or the sensor underneath the keypad.
The dealership can replace the key fob, however it could be costly and take a long time. You can also contact an emergency locksmith who will repair your key fob for less.