Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs can experience problems such as loss of functionality. Certain issues may require professional attention, but many can be fixed at home.
The first step is usually to replace the battery. The majority of fobs have flat watches which are easily found in hardware stores or auto parts stores.
Dead Battery
When a key fob battery fails, it can be a major inconvenience particularly if you're away from home. There are solutions to get your car back on the road in case your keyless entry system has stopped working.
One of the first things to check is to determine if the buttons on your key fob function. If they don't, the problem could be with the locks on your car.
If the keys won't unlock try looking for a mechanical key slot concealed in the trim of your door handle or in another location on the vehicle (consult your owner's manual). Insert the mechanical key, and try again. If this fails to unlock the door, certain cars have an application that lets you unlock it remotely. For example, the FordPass Connect app, the myChevrolet mobile app and myMazda app permit owners to open their doors using their smartphones. These apps charge a monthly fee for subscription.
It is also important to ensure whether your key fob won't take the car's battery away by resting on them. A dead key fob can drain your battery, particularly when you use its remote feature while watching TV or talking on the phone.
A key fob that's just low on battery may be activated by holding it up to the start button. This simple fix could save you from having to visit your dealer or Interstate All Battery Centers.
You can also determine if your key fob is actually dead by trying it in another vehicle that has push-button ignition. If it doesn't, you might need to replace the fob battery. This is why it's a good idea keep an extra key fob in your bag or purse.
Damaged Buttons
If your key fob is unable to unlock doors or start the vehicle remotely, it's possible that one or more of its buttons have been damaged. Your key fob contains an electronic circuit that has "contact pads" which are covered by an electrically conductory film. The film wears away over time. This wear can cause your device to respond more slowly, or even not at all.
The pad that contacts the car keyfob is easily replaced with an flat-head screwdriver. If the case is damaged or badly damaged it may be difficult to open. It is necessary to take it to an auto shop to repair the fob.
It's not uncommon for a key fob to be dropped on hard surfaces, tripped on, or exposed to water. These events can cause physical damage to keys, such as bending or snapping them.
This can also affect the internals of your fob, which could lead to an issue. This is why it's an ideal idea to keep an extra key fob in your purse or pocket in the event that you break the one you already have.
If the buttons on your key fob aren't working in the way they should, first verify that the battery is in good working condition. Key fobs don't need any special electronic device. They use the same battery for two dollars that is used in hearing aids and watches. They are sold in drug, hardware and online stores.
If the battery is fine, it's likely that the buttons are just dirty or worn out, and can be cleaned using a moist cloth to wipe them down. If the buttons do not work, try a different car key fob. This will help determine whether the issue is yours or a specific model. If car remote key repair 's likely the key fob you have needs to be reprogrammed, or possibly replaced entirely.
Reprogramming
The world of car keys fobs is much more complex than many myths suggest. The basic fobs operate using radio frequency signals that are assigned to specific vehicles. The fobs have to be programmed to unlock and start the vehicle. Unfortunately it's not as easy as pressing a few buttons, and with only a few exceptions it has to be done by the dealer.
Check the owner's manual for detailed instructions. Certain manufacturers, like Mercedes, use proprietary technology that guarantees only dealerships can design the new fob and sync it with your vehicle. However some independent shops offer this service as well and you should check reviews and prices before selecting the right shop.
Certain models of cars will erase other fobs after they've been changed, so you'll have to have any additional fobs professionally programmed as well. This can be expensive, especially if your fob has stopped working. It's always wise to have at least one backup mechanical key that you can use to open the trunk and doors even if it's not able to start the car.
Be prepared for a frustrating experience if you choose to reprogram your fob yourself. There are countless guides online that promise to work, but you'll likely be disappointed. A lot of these guides were created by people who have no prior experience in this field, and they're often founded on unsubstantiated claims. Some of them even state that you can program your own car key fob in only a few clicks, which is extremely confusing.
The majority of key fobs are held in place by a plastic clip that is easy to remove but the battery is inside the circuit board, so you'll have to carefully pry it out using a tool. You should be able find the button battery. It's usually tiny batteries for a watch that is available at most home improvement or pharmacies. Replacing the battery is usually simple, and it's always worthwhile to try this first before replacing the entire unit.
Replacement
If the car key fob has been damaged or isn't functioning it is important to know there are several ways to address the issue. It's as simple as replacing the battery or reprogramming the key fob, however a more extensive repair might be required. It can also be helpful to keep a spare fob in case one is lost or stolen.
Modern key fobs are more expensive and more difficult to replace since they have an actual key as well as the electronics. Some "smart" fobs include a remote starter built-in. It's important to know that it can take up to an hour to cut and program an alternative fob for your vehicle.
Fobs communicate with the car's receiver using a small radio transmitter that is mounted on circuit boards. When you press a button, the transmitter sends an RF signal that is unique to the car's receiver. The receiver is able to recognize and compare the signal with preprogrammed codes. This allows the driver to start the car from a distance, without the need to insert the key in the ignition.
If the buttons on your key fob do not respond or function intermittently it could indicate that they have been damaged due to water or other elements. You could be able to repair the fob by disassembling it and inspecting for any broken or non-responsive buttons. If this doesn't fix the problem, you can try reprogramming your fob or getting a new one.
You should check with a local auto dealer or a locksmith prior purchasing a replacement keyfob to ensure that it's compatible with the security system of your vehicle. You can find aftermarket fobs cheaper, but it's important to research the brands and read reviews prior to trying to program them. While some fobs can be replaced by a trusted locksmith, others require special programming equipment that can only be used by a professional auto dealer or auto technician.