Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs can have issues, such as a malfunction. While some issues may require expert attention, most can be resolved at home.
The first step is typically to change the battery. The majority of fobs have batteries with a flat design which are easily found in hardware stores or auto parts stores.
Dead Battery
If a key fob battery is dead, it could be a major inconvenience, especially if you're away from home. Fortunately, there are ways to get back on the road even when your car's keyless entry isn't working.
The first thing to test is if the buttons on the key fob still work. If they do, the issue could be with the car's locks instead of the fob.
If the keys aren't unlocking you need to look for a mechanical key slot concealed in the trim of your door handle or somewhere else on the vehicle (consult your owner's manual). Insert the mechanical key, and try again. If this doesn't unlock the door, some cars come with an application that lets you unlock it remotely. For example the FordPass Connect app, myChevrolet mobile app, and myMazda app allow owners to open their doors using their smartphones. These apps do charge a monthly fee for subscription.
Also, you should ensure that your key fob isn't draining the car's battery by being plugged into it. A dead fob will drain your battery quickly especially if it's used to control the TV or phone while you're watching.
Holding the key fob right to the car's start button could cause the key fob that has an empty battery. This simple fix could save you from having to visit your dealer or certain Interstate All Battery Centers.
If your key fob won't work try testing it in a vehicle with an ignition button. If it doesn't, you may need to replace the fob battery. It's a great idea to keep a spare key fob in your purse or backpack.
Damaged Buttons
If your key fob is unable to open doors or start the car remotely, it's possible that one or more of its buttons are damaged. Your key fob contains a circuit with "contact pads" which are covered by an electrically conductory film. The film wears off over time. The wear may cause your fob to respond more slowly, or even not respond at all.
The good news is that the pad inside the key fob of a car can be replaced easily, and it can be done by using a simple flathead screwdriver. If the case is damaged or badly smashed, it will be difficult to open. You'll need to take it to an auto repair shop to get the fob repaired.
It's not unusual for keys to be dropped on hard surfaces, walked on, or exposed to water. These incidents can result in physical damage, like bending and snapping the keys.
This can also alter the internals of the fob, which could lead to malfunction. This is why it's always recommended to keep a spare key fob in your wallet or pocket in the event that you break the one you already have.
If your key fob's buttons aren't working in the way they should, you should first check to make sure the battery is in good working condition. Key fobs don't need an 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 in good condition it is possible that the buttons are worn or dirty. You can easily clean them with a damp cloth. If the buttons do not work, try an alternative car key fob. This will help you determine if the problem is yours or a particular model. If the other key fob functions, then yours may need to be reprogrammed or replaced.
Reprogramming
The secret world of car key fobs is much more complicated than the myths would suggest. The basic fobs function using radio frequency signals that are assigned to specific vehicles. The fobs must be properly programmed in order to unlock and start the car. Unfortunately it's not as simple as pressing a few buttons and with only a few exceptions it needs to be handled by the dealer.
The process of reprogramming a fob is based on the model and model year of your car It is therefore essential to consult the owner's manual for step-bystep instructions. Certain manufacturers, like Mercedes utilize proprietary technology that makes sure only the dealership can create a new fob and re-sync it with your vehicle. Some independent shops may offer this service, so make sure to check reviews and prices prior to selecting a shop.
Certain models of cars erase all other fobs if they are reprogrammed. This means you'll need to have any extra fobs programmed by professionals. This is an expensive proposition, especially if you're down to just one working fob. Even when the mechanical key doesn't start the car, it's a good idea to have a backup key that can open the doors and trunk.
Be prepared for a gruelling experience if you choose to reprogram your fob by yourself. There are numerous guides available online that promise success but you're likely to be disappointed. Many of these guides were written by people with no knowledge of this field and are often founded on unsubstantiated claims. Some of them even claim that you can program your own car key fob in only a few clicks, which is extremely misleading.
Most key fobs are held in place by a plastic clip that's easy to loosen, however, the battery is within the circuit board, so you'll need to carefully pull it out using a tool. Once you've got inside, you'll be able to locate the button cell battery which is typically a small watch battery that is available at most pharmacies or home improvement stores. The replacement of the battery is generally a straightforward procedure, and it's always worth trying first before replacing the entire device.
Replacement
There are many methods to fix a broken or malfunctioning car key fob. It may be possible to repair the issue quickly by replacing the battery or reprogramming your key fob. However, a more extensive repair may be needed. It can also be helpful to have a spare key fob in the event that one is lost or stolen.
Most modern key fobs include an incredibly small physical key, in addition to the electronics, making them both pricier and more complex to replace than traditional keys. Some "smart fobs" even include remote starters. Therefore, it's important to understand that it could take up to an hour for an alternative key fob cut and programmed to your vehicle.
Fobs communicate with the car's receiver using a tiny radio transmitter on circuit boards. Pressing the button triggers the transmitter, which transmits an RF signal unique to the car's receiver. The receiver recognizes and compares the signal to preprogrammed codes. This allows the driver to unlock the vehicle and begin it from a distance without placing the key in the ignition or turning a lock.
If the buttons on your key fob do not respond or work sporadically it could indicate that they have been damaged by water or other causes. You may be able to repair the fob by removing it and looking for any damaged or non-responsive buttons. If this doesn't fix the issue, you can try reprogramming the fob, or getting a new one.
Before purchasing a replacement key fob on the internet, contact an expert locksmith or your local dealer to ensure that it's compatible with your vehicle's security systems. remote car key repairs can find aftermarket fobs cheaper, but it's important to study the brands and read reviews before attempting to program them. While some fobs can be replaced by a reputable locksmith, other models require special equipment to program them that can only be used by a professional auto dealer or auto technician.