Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs may experience issues with time, like the loss of functionality. While some issues may require professional attention, the majority can be fixed at home.
The first step is typically to replace the battery. The majority of fobs are powered by flat watch-style battery, which are easily found at hardware stores or auto parts stores.
Dead Battery
It can be a real issue when the battery of a key fob dies. This is particularly true when you're away from home. There are ways to get your car back on the road in case your keyless entry system isn't working.
One of the first things you should be sure of is to determine if the buttons on your key fob work. If they do, then the issue may be with your car's locks instead of the fob.
If your keys do not unlock, you might find an electronic slot in the trim around the door handles or in your car (consult the owner's manual). Insert the mechanical key and try again. If this fails, some cars have an app that lets you unlock the doors remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for example let owners unlock their doors using their smartphones. These apps charge a monthly fee for subscription.
Also, you should ensure that your key fob isn't draining your vehicle's battery by resting on it. A dead key fob can drain your battery, particularly when you use its remote feature while watching TV or speaking on the phone.
A key fob that's just low on battery may be activated by bringing it up to the start button. It's a quick fix that will save you going to the dealer or even select Interstate All Battery Center locations.
You can also determine if your key fob is actually dead by testing it in another vehicle with push-button ignition. If it doesn't work the battery of the fob needs replacement. It's a good idea keep a spare key fob in your bag or purse.
Damaged Buttons
If your key fob isn't able to open doors or start your car remotely, it's possible that one or more of its buttons are damaged. Your key fob likely contains circuit boards with "contact pads" for each button, and these tiny pads are covered with an electricity conducting film which wears down over time. This wear can cause your fob to react less quickly, or not to respond at all.
The contact pad on car keys can be easily replaced using an flathead screwdriver. If the key fob is badly damaged or broken in any way, it might be more difficult to remove the case, and you'll have to take the fob to an auto repair shop for repairs.
It's not unusual for a key fob to be dropped, trampled on or even exposed to water. All of these incidents can cause physical damage, including bending and snapping the keys.
It can also cause internal damage to the fob, which could result in malfunction. This is why it's a good idea to carry a spare key fob inside your pocket or wallet in case you accidentally break the one you already have.
If the buttons on your key fob aren't responding to the extent they should, you should first make sure the battery is in good working condition. Key fobs don't require a special type of electronic device. They utilize the same two-dollar battery that is used in hearing aids and watches. The batteries are available at hardware, drug, and online stores.
If the battery is working, it's likely that the buttons are worn down or dirty, and can be cleaned using a moist cloth to wipe them down. If the buttons don't work, you can test another car key fob. This will help determine if the problem is yours or a particular model. If the other fob functions then it's likely your key fob has to be reprogrammed or possibly replaced entirely.
Reprogramming
The world of car key fobs is much more complicated than the myths suggest. The basic fobs work by using unique radio frequency signals that are assigned to specific cars. The fobs must be properly programmed to unlock and start the vehicle. Unfortunately the process of 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.
Consult your owner's guide for specific 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. key car repair may offer this service, so be sure to read reviews and prices before selecting a shop.
Some car models will erase all other fobs once they are changed. This means that you'll have to have additional fobs programmed by a professional. This can be expensive particularly if your fob isn't working anymore. It's always recommended to have at minimum a backup mechanical key that you can use to open the trunk and doors even if it doesn't start the car.
If you attempt to reprogram your fob yourself be prepared for a difficult journey. 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 who have no experience and are based on unsubstantiated statements. Some of these guides claim that you can easily program your car key fob by yourself in just a few clicks. This is a false claim.
The majority of key fobs are held in place by a plastic clip that is easy to remove however, the battery is located inside the circuit board, and you'll have to carefully pry it out using a device. You should be able to find the button cell battery. It's usually an insignificant battery for watches that is available at most home improvement or pharmacies. It's usually easy to replace the battery. Before replacing the whole device, you should try it first.
Replacement
There are a variety of methods to fix a broken or damaged car key fob. An easy fix could be as easy as replacing the battery or reprogramming the key fob, but a more thorough repair may be required. It is also 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 the physical key as well as the electronics. Certain "smart" fobs even come with a remote starter. It's therefore important to be aware that it could take up to an hour to have a new key fob cut and programmed to your vehicle.
Fobs use a small radio transmitter mounted on a circuit board to communicate with the car's receiver. Pressing the button triggers the transmitter, and it transmits an RF signal unique to the car's receiver. The receiver receives the signal and verifies it against 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 your key fob aren't responding or working intermittently, they could be damaged by water. You can repair the fob if you take it apart and look for damaged or non-responsive buttons. If this doesn't resolve the issue, try reprogramming or buying a new fob.
It is recommended to consult an auto dealer in your area or a locksmith before purchasing a replacement keyfob to ensure it is compatible with the security system of your vehicle. There are a variety of aftermarket key fobs available less expensive, but it's crucial to look up the brands and read reviews prior to attempting to program them. While some fobs can be replaced by a reputable locksmith, others require special equipment to program them that can only be used by a vehicle dealer or auto technician.