Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs may be affected by issues such as losing functionality. While some issues might require professional attention, many can be resolved at home.
The battery replacement is usually the first step. The majority of fobs are powered by flat watch-style batteries, which is easily available in hardware or auto parts stores.
Dead Battery
If a key fob battery fails, it can be a huge inconvenience particularly if you're away from home. There are methods to get your car back on the road if you're keyless entry system isn't working.
The first thing to test is if the buttons on the key fob are working. If they don't then the issue could be in the car's locks.
If your keys won't unlock, you might find a mechanical 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 doesn't work certain cars come with an app that can open doors remotely. FordPass Connect MyChevrolet Mobile App, myMazda apps, for example allow owners to open their doors with their smartphones. However, these apps are subject to an annual cost.
It is also important to ensure that your key fob doesn't drain your car's batteries by sitting on them. A dead key fob can drain your battery fast, especially if it is used to control your phone or TV while you are watching.
A key fob that's just low on battery can sometimes be started by holding it right up to the start button. This simple fix can save you from having to visit your dealer or to certain Interstate All Battery Centers.
You can also determine whether your key fob is actually dead by testing it in another vehicle with the push-button ignition. If it doesn't, you might need to replace the battery in your fob. It's a great idea to keep an extra key fob in your bag or purse.
Damaged Buttons
It is possible that your key fob has a damaged button. The key fob has a circuit with "contact pads" that are covered with an electrically conductor film. This film wears off over time. This wear can make your fob respond slow or not respond at all.
The pad that contacts car keys can be easily replaced using a flat-head screwdriver. If, however, the key fob is severely damaged or smashed in any way, it could be more difficult to remove the case, and you'll need to take the fob into an auto repair shop for repairs.
It's not uncommon for a key fob being dropped, trampled or even exposed to water. These incidents can cause physical damage, such as breaking and snapping keys.
This can also alter the internals of the fob and could cause an issue. It's a good idea, that's why you should always carry an extra fob in your purse or pocket in case the one you currently have fails.
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 condition. Key fobs don't need an electronic device. They are powered by the same two-dollar battery that is used in hearing aids and watches. These batteries are available at drug, hardware, and online stores.
If the battery is in good condition, it's likely that the buttons are just dirty or worn out, and can be cleaned by using a damp cloth to wipe them down. If they're still not responding, try a different key fob to determine whether the issue is with yours or with a particular type of car key fob. If the other key fob works it is possible that yours needs to be reprogrammed or replaced.
Reprogramming
The hidden world of car key fobs is more complicated than the myths suggest. The basic fobs function on unique radio frequency signals that are assigned to specific vehicles. The fobs need to be properly programmed in order to open and start the vehicle. Reprogramming a key fob not as easy as pressing a few keys. It's usually done by the dealer.
The process of reprogramming a fob depends on the make and model year of your vehicle, so it's important to consult the owner's manual for step-bystep instructions. Certain manufacturers, such as Mercedes have proprietary technology that only the dealership is able to create a new key fob and then resync it to your vehicle. auto key repair might offer this service, so check reviews and prices before choosing the right shop.
Certain models of cars erase other fobs when they are programmed again. This means that you'll have to have any additional fobs programmed by professionals. This can be expensive, especially if your fob isn't working anymore. It's always recommended to have a spare mechanical key that you can use to open the doors and trunk even if it doesn't start the car.
Be prepared for a gruelling experience if you choose to reprogram your fob yourself. There are numerous guides available online that promise to work, but you'll likely be disappointed. A lot of these guides were written by people with no knowledge of this field, and they're often founded on unsubstantiated claims. Some of them even state that you can program your car key fob with just a few clicks, which can be very confusing.
Most key fobs are secured by a plastic clip that is easy to remove but the battery is inside the circuit board, and you'll have to carefully pry it out with a tool. You should be able to locate the button battery. It's typically tiny batteries for watches that can be purchased at any pharmacies or home improvement stores. The replacement of the battery is generally a straightforward procedure, and it's always worth trying first before replacing the entire unit.
Replacement
There are a variety of ways to fix a broken or non-functioning car key fob. A quick fix can be as simple as replacing the battery or programming the key fob but a more in-depth repair may be needed. It can also be helpful to keep a spare fob in the event that one is lost or stolen.
The majority of modern key fobs have a small physical key in addition to the electronic component they use, which makes them both more expensive and more complex to replace than traditional keys. Some "smart" fobs come with a remote starter. It's important to understand that it could take up to an hour to cut and program an alternative fob for your vehicle.
Fobs use a small radio transmitter that is mounted on a circuit board to communicate with the car's receiver. Pressing an appropriate button will activate the transmitter, which sends a unique RF signal to the car's receiver. The receiver is able to recognize and compare the signal to preprogrammed codes. This allows a driver to start the car from a distance without the need to put the key in the ignition.
If the buttons on your key fob fail to respond or function intermittently it could mean that they've been damaged due to water or other elements. You could be able to fix the fob by removing it and inspecting for any broken or unresponsive buttons. If this doesn't solve the issue, you can try reprogramming it or purchasing a new fob.
It is recommended to consult a local auto dealer or a locksmith prior to purchasing a replacement keyfob online to ensure it's compatible with the security system of your vehicle. Aftermarket fobs can be cheaper however, you must look into the brands and read reviews prior to trying to program them yourself. While certain fobs can be repaired by a trusted locksmith, others require specialized equipment for programming that can only be used by a professional auto dealer or auto technician.