Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can have issues with time, like an inability to function. While some issues may require professional attention, the majority can be resolved at home.
The first step is typically to replace the battery. Most fobs use flat watch-style batteries that are readily available at hardware stores or auto parts stores.
Dead Battery
It can be a real problem when a key fob's battery goes out. This is particularly true when you're away from home. However, there are options to get back on the road the vehicle's keyless entry system isn't working.
One of the first things you should examine is whether the buttons on your key fob function. If they do, the issue could be in the locks of your car instead of the fob.
If the keys aren't unlocking try looking for a key slot with a mechanical lock hidden in the trim of your door handle or somewhere else on the car (consult the owner's manual). Insert the mechanical key and try again. If this doesn't work there are some cars that have an app that can unlock doors remotely. For instance, the FordPass Connect app, the myChevrolet mobile app, and myMazda app allow owners to unlock 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 your vehicle's battery by being plugged into it. A dead key fob will quickly drain your battery, especially when you utilize its remote features while watching TV or speaking on the phone.
A key fob that's low on battery may be started by holding it until you hit the start button. 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 trying it in another vehicle that has push-button ignition. If it doesn't work, you may need to replace the battery in your fob. It's a good idea to keep a spare key fob in your purse or backpack.
Damaged Buttons
It's possible that your key fob is damaged and has a button. Your key fob is likely to have circuit boards with "contact pads" for each button, and these tiny pads are coated with an electrically conducting film which wears down over time. This wear can cause your device to respond less quickly, or not respond at all.
The contact pad on a car keyfob can be easily replaced with a flat-head screwdriver. However, if the key fob is severely smashed or harmed in any way, it might be more difficult to open the case, and you'll have to take the fob into an auto shop for repair.
It's not uncommon for a key fob being dropped, trampled or even exposed to water. These events can cause physical damage to the keys, which could result in them breaking or snapping them.
This can also affect the internals of your fob and could cause a malfunction. It is a good idea, that's why you should always carry an additional fob in your purse or pocket in the event that the one you currently have fails.
Examine the battery first to determine to determine if the buttons on your key fob aren't working like they should. Key fobs don't need an electronic device. They use the same battery for two dollars that is used in hearing aids and watches. The batteries are available in drug, hardware and online stores.
If the battery is fine, it's likely that the buttons are worn down or dirty and can be cleaned by using a damp cloth to clean them. If they're still not responding, try a different type of key fob to determine whether the problem is with yours or with a specific type of car key fob. If the other key fob works, then yours may need to be reprogrammed or replaced.
Reprogramming
The secret world of car key fobs is much more complex than some myths suggest. Basic fobs function with radio frequency signals that are specific to each vehicle. The fobs have to be programmed correctly to open and start the vehicle. Reprogramming a key fob not as easy as pressing several keys. It is usually handled by the dealer.
The process of reprogramming a fob depends on the make and model year of your vehicle, so it's important to read the owner's manual to get step-by-step instructions. Certain manufacturers, like Mercedes, use proprietary technology that guarantees only the dealership can create a new fob and re-sync it with your vehicle. However, some independent shops can provide this service too, 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 have to have any extra fobs programmed by professionals. This can be costly particularly if you're just one functional fob. It is always advisable to have a spare mechanical key that you can use to unlock the trunk and doors, even if it won't start the car.
If you attempt to reprogram your fob yourself, be prepared for a gruelling journey. You'll be disappointed with the numerous online guides that claim to be successful. A majority of these guides were written by people who have no experience and are based on unsubstantiated statements. Some even claim that you can program your own car key fob in only a few clicks, which can be very misleading.
The battery is typically held in place by a plastic clip, which is easily removed. However the circuit board is home to the battery, and you will need to carefully remove the battery using the aid of a tool. Once you get 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. Removing the battery is typically a straightforward procedure, and it's always a good idea to test this first before replacing the entire unit.
Replacement
There are many methods to fix a broken or damaged car key fob. It is possible to fix the problem quickly by replacing the battery or reprogramming the key fob. However an extensive repair may be required. A spare fob could be useful in the event that one is stolen or lost.
Most modern key fobs include the physical key, in addition to the electronic components, making them both pricier and more difficult to replace than traditional keys. Some "smart fobs" include a remote starter. It's therefore important to know that it can take up to an hour to have an alternative key fob cut and programmed to your vehicle.
Fobs utilize a small radio transmitter mounted on a circuit board to communicate with the car's receiver. Pressing an appropriate button will activate the transmitter, and it transmits a unique RF signal to the car's receiver. The receiver detects the signal and checks it against the preprogrammed codes. This allows the driver to unlock the vehicle and start it from a distance without inserting the key into the ignition or turning a lock.
If your key fob buttons aren't responding or working in a sporadic manner, they may be damaged by water. You can fix the fob by taking it apart and examine for broken or non-responsive buttons. If key fob repairs doesn't fix the issue, try reprogramming your fob or purchasing another one.
It is best to check with an auto dealer in your area or a locksmith prior to buying a replacement keyfob on the internet to ensure that it's compatible with the security system of your vehicle. There are many aftermarket fobs cheaper, but it's essential to study the brands and read reviews before trying to program them. Certain fobs can be programmed by an accredited locksmith however, other models require programming equipment that only a technician in the automotive industry or dealer can utilize.