Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can experience problems over time, including a loss of functionality. While some issues may require professional attention, the majority can be resolved at home.
The first step is generally to change the battery. The majority of fobs are powered by flat watch-style batteries, which is easily available at auto parts or hardware stores.
Dead Battery
If a key fob battery dies, it can be a major inconvenience, especially if you're away from home. There are you can try this out to get your car back on the road in case your keyless entry system has stopped working.
One of the first things you should examine is whether the buttons on your key fob function. If they do, the problem may lie in the locks of your car instead of the fob.
If your keys don't work try looking for a mechanical key slot located in your door handle trim or somewhere else on the vehicle (consult the owner's manual). Insert the mechanical key, and try again. If this doesn't work there are some cars that have an app that can unlock the doors remotely. For example the FordPass Connect app, the myChevrolet mobile app and myMazda app permit owners to open their doors with their smartphones. These apps charge a monthly fee for subscription.
It is also important to ensure that your key fob does not take the car's battery away by sitting on them. A dead fob will drain your battery fast especially if it's used to control your phone or TV while you are watching.
Holding you can try this out towards the start button may cause a key fob with a low battery. It's a simple fix that will save you a trip to the dealer or to select Interstate All Battery Center locations.
If your key fob does not work, you can test it in a vehicle that has an ignition button. If it doesn't work, you might need to replace the battery in your fob. It's a good idea to keep a spare key fob in your purse or backpack.
Damaged Buttons
If your key fob isn't able to open doors or start the car remotely, it's likely that one or more of its buttons have been damaged. Your key fob contains a circuit with "contact pads" that are covered with an electrically conductive film. The film wears away over time. This wear could cause your fob to respond slower, or not at all.
The pad that contacts a car keyfob can be easily replaced with a flat-head screwdriver. If, however, the key fob is severely smashed or harmed in any way, it may be more difficult to open up the case, and you'll have to take the fob into an auto shop for repair.
It's not common for a key fob being dropped, trampled or even exposed to water. All of these can cause physical damage to keys, such as bending or snapping them.
This can also cause internal damage to the fob that could lead to malfunction. This is why it's always recommended to keep a spare key fob in your purse or pocket in case you break the one you have.
If your key fob's buttons aren't responding in the way they should, first check to make sure the battery is in good working condition. Key fobs don't require an electronic device. They utilize the same two-dollar battery that is used in hearing aids and watches. These batteries are available at drug, hardware, and online stores.
If the battery is good the buttons could be dirty or worn out. You can easily clean them using a damp cloth. If the buttons don't work, you can test a different car key fob. This will help determine if the problem is yours or a specific model. If the other key fob works, then yours may need to be reprogrammed or replaced.
Reprogramming
The hidden world of car key fobs is much more complex than some myths would suggest. Basic fobs function using radio frequency signals that are unique to each car. The fobs must be properly programmed to unlock and begin the vehicle. Reprogramming a key fob not as simple as pressing several keys. It is usually handled by the dealer.
The procedure for reprogramming the fob is based on the model and model year of your car and it's essential to consult the owner's manual for step-bystep instructions. Certain manufacturers, like Mercedes utilize proprietary technology that makes sure only dealerships can design the new fob and sync it with your vehicle. Some independent shops may also offer this service, so make sure to check reviews and prices prior to choosing a shop.
Certain car models erase other fobs when they're changed, so you'll need any additional fobs programmed professionally. This can be costly especially if the fob isn't working anymore. Even when the mechanical key doesn't work to start your vehicle, it's a great idea to have a backup that can open the doors and trunk.
Be prepared for a frustrating experience if you decide to reprogram your fob by yourself. You'll be disappointed with the numerous guides on the internet that promise success. A lot of these guides were created by people who have no experience in this area, and they're often founded on unsubstantiated claims. Some even claim that you can program your car key fob with just a few clicks, which is very misleading.
The majority of key fobs are held in place by a plastic clip that's easy to loosen, however, the battery is located inside the circuit board, which means you'll have to carefully pry it out using a tool. Once you get inside, you should be able locate the button cell battery, which is usually a small watch battery that is available in most pharmacies or at home improvement stores. Removing the battery is typically simple, and it's always worthwhile to try this first before replacing the entire device.
Replacement
If a car key fob is damaged or fails to function it is crucial to know that there are several ways to address the issue. It may be possible to resolve the issue quickly by replacing the battery or programming your key fob. However it is possible that a more extensive repair may be needed. A spare fob can be helpful in the event that one is lost or taken.
Modern key fobs are more expensive and more difficult to replace since they have the physical key along with electronic. Some "smart" fobs come with a remote starter. It's therefore important to understand that it can take up to an hour to have a replacement key fob cut and programmed to your vehicle.
Fobs communicate with the car's receiver using a small radio transmitter on a circuitboard. Pressing the button triggers the transmitter, and it transmits a unique RF signal to the car's receiver. The receiver recognizes and compares the signal to preprogrammed codes. This lets the driver unlock the car and begin it from a distance, without placing the key in the ignition or turning a lock.
If your key fob buttons aren't working or responding intermittently, they could be damaged by water. You can fix the fob if you take it apart and look for buttons that are not responsive or broken. If this doesn't resolve the issue, try reprogramming the fob or purchasing a new fob.
You should check with a local auto dealer or a locksmith prior to purchasing a replacement keyfob online to make sure it's compatible with the security system of your vehicle. There are many aftermarket fobs cheaper, but it's essential to research the brands and read reviews before trying to program them. While some fobs can be replaced by a trusted locksmith, others require special equipment for programming that can only be used by a professional auto dealer or auto technician.