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 the loss of functionality. While some issues might require professional attention, many can be fixed at home.
The first step is usually to replace the battery. The majority of fobs have flat watch-style batteries that are readily available at hardware stores or auto parts stores.
Dead Battery
It can be an incredibly issue when a key fob's battery is dead. This is especially true when you are far from home. Fortunately, there are ways to get back on the road when your vehicle's keyless entry system isn't working.
The first thing to check is if the buttons on the fob are still working. If they do, the issue may be with your car's locks instead of the fob.
If the keys won't unlock try looking for a mechanical key slot located in the door handle trim or on another part of the vehicle (consult your owner's manual). Insert the mechanical key, and try again. If This Web page doesn't work there are some cars that have an app that lets you unlock doors remotely. FordPass Connect MyChevrolet Mobile App, myMazda apps, for instance let owners unlock their doors using smartphones. However, these apps have a monthly fee.
You should also make sure that your key fob isn't draining your vehicle's battery by resting on it. A dead fob can quickly drain your battery, especially if 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 until you hit the start button. This quick fix can save you from a trip to your dealer or to certain Interstate All Battery Centers.
If your key fob won't work try testing it in a vehicle with an electronic starter button. If it fails it's likely that the battery needs replacement. It's a good idea keep a spare key fob in your backpack or purse.
Damaged Buttons
It is possible that your key fob is damaged and has a button. Your key fob contains an electronic circuit that has "contact pads" that are covered with an electrically conductor film. The film wears off over time. The wear may cause your fob to respond less or not at all.
The pad that contacts a car keyfob can be easily replaced using the flat-head screwdriver. If the case is damaged or badly smashed, it will be difficult to open. You'll have to take it to an auto repair shop to repair the fob.
It's not uncommon for a key fob being dropped, trampled or even exposed to water. All of these events can result in physical damage, like breaking the keys and snapping them.
It could also alter the internals of the fob which could result in 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 damage the one you own.
If your key fob's buttons aren't working as they should, you should first verify that the battery is in good working condition. Remember that key fobs aren't any special kind of electronic device; they're typically powered by the same two-dollar batteries that are used in hearing aids and watches, which are readily accessible at hardware stores, drug stores, and online.
If the battery is in good condition the buttons could be worn or dirty. You can easily clean them using a damp cloth. If they're still not responding, you can try a different key fob to determine whether the issue is with yours, or a specific kind of car key fob. If the other key fob functions it is possible that yours needs to be reset or replaced.
Reprogramming
The world of fobs for car keys is more complex than many myths suggest. Basic fobs function on radio frequency signals unique to each car. The fobs must be properly programmed to unlock and start the vehicle. Unfortunately the process of reprogramming a fob isn't as easy as pressing a few buttons, and with very few exceptions it has to be done by a dealer.
Consult your owner's guide for more detailed instructions. Certain manufacturers, like Mercedes, use proprietary technologies that only dealerships are able to create a new key fob and resync it to your vehicle. Some independent shops may also offer this service, so check reviews and prices before selecting the right shop.
Certain car models erase all other fobs if they're changed. This means that you'll have to have any extra fobs programmed by an expert. This can be costly especially if you're only down to one functioning fob. It's always wise to have at least one spare mechanical key that you can use to unlock the trunk and doors even if it doesn't start the car.
Be prepared for a difficult experience if you decide to reprogram your fob by yourself. There are numerous guides available online that promise to work but you're likely to be disappointed. A lot of these guides were written by people with no experience and are based on unsubstantiated claims. Some even claim that you can program your own car key fob with just a few clicks, which is very confusing.
The battery is typically held in place by an elastic clip that can be easily removed. However the circuit board houses the battery, so you will need to carefully remove the battery using an instrument. Once you've gotten inside, you should be able to locate the button cell battery, which is typically a small watch battery that can be purchased at a variety of pharmacies or home improvement stores. It's typically easy to replace the battery. Before replacing the whole unit, you can try replacing the button cell first.
Replacement
If your car key fob has been damaged or fails to function it is crucial to know that there are several ways to remedy the problem. It is possible to fix the problem quickly by replacing the battery or reprogramming your key fob. However an extensive repair might be required. It is also helpful to have a spare key fob in case one gets lost or stolen.
Most modern key fobs contain the physical key in addition to the electronic component which makes them more expensive and more difficult to replace than traditional keys. Some "smart fobs" even include remote starters. It's therefore important to know that it could take up to an hour to get a new key fob cut and programmed to your vehicle.
This Web page communicate with the car receiver using a small radio transmitter that is mounted on the circuit board. By pressing a button, the transmitter emits an RF signal specific to the car receiver. The receiver detects and compares the signal to preprogrammed codes. This allows the driver to start the car from a distance, without the need to put the ignition key in.
If the buttons on the fob you have purchased fail to respond or function intermittently it could indicate that they've been damaged by water or other factors. You could be able to fix the fob by disassembling it and examining it for broken or non-responsive buttons. If this does not solve the issue, try reprogramming or buying a new fob.
Before buying a replacement key fob on the internet, consult a professional locksmith or your local dealer to confirm that it is compatible with your vehicle's security systems. There are many aftermarket fobs cheaper, but it's important to look up the brands and read reviews prior to trying to program them. While certain fobs can be repaired by a reputable locksmith, others require specialized equipment for programming that can only be used by a professional auto dealer or auto technician.