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Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working

Over time, key fobs could experience problems such as losing functionality. Certain issues might require professional attention, however many can be fixed at home.

The first step is generally to change the battery. Most fobs run on a flat watch-style battery, which is easily available in hardware or auto parts stores.

Dead Battery

If a key fob battery dies, it can be a major inconvenience especially if you're far from home. There are ways to get back on the road even when your car's keyless entry doesn't work.

The first thing to test is to see if the buttons on the fob are still working. If they do, then the issue could be in the locks of your car instead of the fob.

If your keys do not unlock, there may be a mechanical slot in the trim around your door handles or in other places on your car (consult the owner's manual). Insert the mechanical key and try again. If this fails certain cars come with an app that allows you to open doors remotely. FordPass Connect MyChevrolet Mobile App, myMazda apps, for example let owners unlock their doors using smartphones. However, these apps are subject to an annual cost.

It is also important to ensure that your key fob isn't draining the car's battery by being plugged into it. A dead key fob can drain your battery, especially if you use its remote features while watching TV or talking on the phone.

Holding the key fob right up to your car's start button can sometimes start the key fob that has an empty battery. It's a quick solution that could save you a trip to the dealership or select Interstate All Battery Center locations.

You can also find out if your key fob is actually dead by testing it in another vehicle with the push-button ignition. If it fails it's likely that the battery requires replacement. This is why it's a good idea keep a spare key fob in a purse or backpack.

Damaged Buttons

If your key fob isn't able to unlock doors or start your car remotely, it's likely that one or more of its buttons have been damaged. The key fob may contain a circuit board with "contact pads" for each button, and these little pads are coated with an electricity conducting film which wears down over time. This wear can cause your fob to react more slowly, or even not to respond at all.

The good news is that the pad inside the car key fob can be replaced easily, and can be done so by using a flathead screwdriver. If, however, the key fob is badly damaged or broken in any way, it may be more difficult to remove the case, and you'll need to take the fob to an auto repair shop to be repaired.

It's not unusual for a key fob to be dropped on hard surfaces, walked on, or exposed to water. All of these can cause physical damage to keys, including bending or snapping them.

This could also cause internal damage to the fob and result in malfunction. This is why it's always a good idea to carry a spare key fob in your purse or pocket in case you accidentally break the one you already have.

Check the battery first If your key fob's buttons aren't responding in the way they should. Be aware that key fobs aren't a special kind of electronic device - most of them run on the same two-dollar batteries used in hearing aids and watches that are readily available at hardware stores, drug stores, and online.

If the battery is in good condition the buttons could be dirty or worn out. You can easily clean them with a damp cloth. If the buttons don't work, you could try 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 reset or replaced.

Reprogramming

The secret world of fobs for car keys is more complex than many myths suggest. Basic fobs operate with radio frequency signals that are unique to each car. The fobs need to be programmed correctly to be able to be able to unlock and start the car. Reprogramming a key fob is not as simple as pressing several keys. It's usually done by the dealer.

Refer to the owner's manual for specific instructions. Some manufacturers, such as Mercedes utilize proprietary technology that ensures only dealerships can design a new fob and re-sync it with your vehicle. Some independent shops may also 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're changed. key repairs means that you'll need to have any extra fobs programmed by a professional. This can be costly particularly if you're down to just one working fob. It's always recommended to have at minimum a spare mechanical key you can use to open the trunk and doors, even if it won't start the car.

Be prepared for a gruelling experience if you opt to reprogram your fob yourself. You'll be disappointed by the countless online guides that promise success. Many of these guides were written by people who have no experience in this area, and they're often based 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.

The battery is typically held in place with a plastic clip, which can be removed easily. However the circuit board is home to the battery, so you'll need to remove the battery with an instrument. Once you've gotten inside, you'll be able to locate the button cell battery, which is usually a small watch battery that is available in most pharmacies or at home improvement stores. It's usually simple to replace the battery. Before replacing the whole unit, it's worth trying first.





Replacement

There are many ways to fix a broken or damaged car key fob. It's as easy as replacing the battery or reprogramming the key fob, however a more extensive repair might be required. A spare fob could be useful in the event that one is stolen or lost.

Modern key fobs are more expensive and difficult to replace due to the fact that they have a physical key as well as the electronic. Some "smart fobs" even include a remote starter. It's important to be aware that it could take an hour or more to cut and program an alternative fob for your vehicle.

Fobs communicate with the car receiver by using a small radio transmitter on a circuitboard. Pressing an appropriate button will activate the transmitter, which sends a unique RF signal to the car's receiver. The receiver receives the signal and verifies it against the preprogrammed codes. This allows the driver to unlock the vehicle and start it from a distance without placing the key in the ignition or turning the lock.

If the buttons on the fob you have purchased fail to respond or operate intermittently it could indicate that they have been damaged by water or other causes. You can fix the fob if you take it apart and look for damaged or non-responsive buttons. If this doesn't resolve the problem, you can try reprogramming the fob, or buying a new one.

Before buying a replacement key fob online, you should seek out an expert locksmith or your local auto dealer to make sure it's compatible with the security system of your vehicle. There are many aftermarket fobs cheaper, but it's important to research the brands and read reviews before attempting to program them. Certain fobs can be modified by a locksmith who is reputable, but other models require programming equipment that only a mechanic or dealer is able to utilize.