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

Key fobs can have issues over time, including the loss of functionality. Certain issues might require professional attention, however many are fixable at home.

Change the battery is often the first step. Most fobs run on a flat watch-style battery, which are easily found at hardware stores or auto parts stores.

Dead Battery

It can be an incredibly inconvenience when the battery of a key fob is dead. This is especially the case when you are far from home. Fortunately, there are ways to get back on the road the car's keyless entry isn't working.

The first thing you should check is if the buttons on the key fob are working. If they do, the issue could be with your car's locks instead of the fob.

If your keys will not unlock, you might find an electronic slot in the trim around your door handles or in other places on your car key repair service (consult the owner's manual). Insert the mechanical key, and try again. If this fails, some cars have an app that lets you open doors remotely. For example the FordPass Connect app, myChevrolet mobile app, and myMazda app allow owners to unlock their doors with their smartphones. These apps charge monthly subscription fees.

Also, make sure that your key fob does not drain the batteries of your car by being plugged into them. A dead key fob can drain your battery, especially if you use its remote feature while watching TV or speaking on the phone.

Holding the key fob right towards the start button may cause the key fob that has low battery. It's a simple fix that will save you going to the dealer or to select Interstate All Battery Center locations.

If your key fob won't work, you can test it in a vehicle with a push-button starter. If it doesn't work, the fob battery probably requires replacement. This is why it's a good idea keep an extra key fob in the bag or purse.

Damaged Buttons

It's possible that your key fob is damaged and has a button. The key fob may contain circuit boards with "contact pads" for each button. These little pads are coated with an electrically conducting film that wears down over time. The wear may cause your fob to react more slowly, or even not at all.

The good news is that the contact pad in the car key fob is easy to replace, and is done using a simple flathead screwdriver. However, if the key fob is badly damaged or smashed in any way, it might be more difficult to open the case, and you'll have to take the fob into an auto repair car remote control key shop for repairs.

It's not unusual for a key fob to being dropped, trampled, or exposed water. These events can cause physical damage to the keys, such as bending or snapping them.

It could also affect the internals of your fob and could cause a malfunction. It's a good idea, therefore, to always carry an extra fob in your purse or in your pocket in case the one you're currently using breaks.

Check the battery first if your key fob buttons are not responding as they should. Be aware that key fobs aren't any special kind of electronic device; they're typically powered by the same batteries for two dollars that are used in hearing aids and watches and are accessible at hardware stores, drug stores, and online.

If the battery is in good condition, the buttons may be dirty or worn out. You can easily clean them using a damp cloth. If they're still not responding, test a different key fob to see whether the issue is related to yours or with a specific type of car key fob. If the other fob is working, it's likely that your key fob needs to be reprogrammed, or even replaced completely.

Reprogramming

The secret world of car key fobs is more complicated than the myths would suggest. The basic fobs operate on unique radio frequency signals that are assigned to specific cars. The fobs have to be programmed to unlock and begin the vehicle. Unfortunately, reprogramming a fob isn't as simple as pressing a few buttons and with only a few exceptions it needs to be handled by a dealer.

Refer to the owner's manual for more detailed instructions. Certain manufacturers, such as Mercedes, use proprietary technologies that only dealers are capable of creating a brand new key fob and then resync it to your vehicle. However some independent shops offer this service as well, so be sure to check reviews and prices before selecting a shop.

Certain models of cars erase all other fobs if they are programmed again. This means that you'll need to have any additional fobs programmed by professionals. This can be costly particularly if your fob has stopped working. Even if the mechanical key won't work to start the vehicle, it's a good idea to have a backup option that can open the trunk and doors.

Be prepared for a difficult experience if you opt to reprogram your fob yourself. There are many guides on the internet that promise success, but you'll likely be disappointed. A lot of these guides were written by people with no experience and are based on unsubstantiated assertions. Some of these guides claim that you can easily program your car's key fob yourself with a few clicks. This is false.

Most key fobs are held in place by a clip made of plastic which is easy to remove, however, the battery is located inside the circuit board, and 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 typically a tiny watch battery that can be purchased at most pharmacies or home improvement stores. It's usually easy to replace the battery. Before replacing the whole unit, you can try replacing the button cell first.

Replacement

If a car key fob has been damaged or isn't functioning it is crucial to know there are several options to fix the issue. It could be possible to repair the issue quickly by replacing the battery or reprogramming the key fob. However an extensive repair might be required. It can also be helpful to have a spare key fob in case one gets lost or stolen.

Modern key fobs are more expensive and difficult to replace due to the fact that they have a physical key along with electronic. Some "smart fobs" even come with a remote starter. It's therefore important to be aware that it can take up to an hour to get an alternative key fob cut and programmed for your vehicle.

Fobs utilize a small radio transmitter that is mounted on circuit boards to communicate with the car keys repairs's receiver. Pressing the button triggers the transmitter, which sends an RF signal that is unique to the car's receiver. The receiver receives the signal and validates it against the preprogrammed codes. This allows the driver to open the car and begin it from a distance without placing the key in the ignition or turning the lock.

If your fob's buttons aren't working or responding intermittently, they could have been damaged by water. It is possible to fix the fob by removing it and inspecting for any broken or unresponsive buttons. If this doesn't solve the issue, try reprogramming your fob or purchasing a new one.

It is best to check with an auto dealer in your area or a locksmith before purchasing a replacement keyfob to ensure that it is compatible with the security system of your vehicle. Aftermarket fobs can be cheaper but you should look into the brands and read reviews prior to attempting to program them yourself. While some fobs are able to be replaced by a reputable locksmith, others require specialized equipment to program them that can only be used by a car dealer or auto technician.