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 malfunction. While some issues may require expert attention, most can be fixed at home.
The battery replacement is usually the first step. Most fobs use flat watches that are easy to find at hardware stores or auto parts stores.
Dead Battery
It can be a major problem when the battery of a key fob is dead. This is particularly true when you're away from home. There are ways to get your vehicle back on the road in case your keyless entry system has stopped working.
The first thing you should check is if the buttons on the fob are still working. If they do, the issue could be in the locks of your car instead of the fob.
If your keys do not unlock, you may 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 doesn't work there are some cars that 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 smartphones. These apps are charged a monthly fee for subscription.
You should also make sure that your key fob isn't draining your car's battery by sitting on it. A dead key fob can drain your battery quickly particularly if it's used to control the TV or phone while you are watching.
A key fob that's just low on battery can be started by holding it up to the start button. Full Content 's a simple fix that will save you going to the dealer or select Interstate All Battery Center locations.
If your key fob doesn't work, you can test it in a vehicle that has an ignition button. If it doesn't, you might need to replace the fob battery. This is why it's a good idea to keep a spare key fob in a purse or backpack.
Damaged Buttons
It's possible that the key fob is damaged and has a button. Your key fob likely contains an electronic circuit board that has "contact pads" for each button, and these tiny pads are covered with an electrically conducting film that wears away over time. The wear may cause your fob to respond more slowly, or even not respond at all.
The good news is that the pad on the key fob of a car is simple to replace and it can be done with the help of a simple flathead screwdriver. If, however, the key fob has been badly smashed or harmed in any way, it may be more difficult to remove the case, and you'll be required to take the fob to an auto shop for repair.
It's not unusual for a key fob to be dropped on hard surfaces, tripped on, or exposed to water. These events can cause physical damage to keys, including bending or snapping them.
This can also cause internal damage to the fob and result in an issue. It's a good idea, that's why you should always carry an additional fob in your wallet or pocket in the event that the one you're using is damaged.
If the buttons on your key fob aren't working as they should, first check to make sure the battery is in good condition. Key fobs don't need a special type of electronic device. They are powered by the same battery for two dollars that is used in hearing aids and watches. The batteries are available at drug, hardware, and online stores.
If the battery is in good condition the buttons could be worn or dirty. You can easily clean them with a damp cloth. If they're still not responding, try a different key fob to determine if the problem is related to yours or with a specific type of car key fob. If the other key fob functions, then yours may need to be reprogrammed or replaced.
Reprogramming
The hidden world of car key fobs is much more intricate than what some myths suggest. The basic fobs work by using unique radio frequency signals that are assigned to specific vehicles. The fobs must be programmed correctly to open and start the car. Reprogramming a key fob not as easy as pressing several keys. It is usually handled by the dealer.
Consult your owner's guide for detailed instructions. Certain manufacturers, such as Mercedes have proprietary technology that only dealers are able to create a new key fob and resync it to your vehicle. However, some independent shops can offer this service as well so make sure to look up reviews and prices prior to selecting the right shop.
Certain models of cars erase all other fobs if they're reprogrammed. This means you'll need to have additional fobs programmed by a professional. This is a costly proposition, especially if you're just one functional fob. It's always wise to have at minimum a spare mechanical key that you can use to open the trunk and doors, even if it won't start the car.
If you do attempt to reprogram your fob on your own, be prepared for a frustrating journey. You'll be disappointed with the numerous guides on the internet that claim to be successful. Many of these guides were written by people with no knowledge of this field, and they're often founded on unsubstantiated claims. Some of these guides claim that you can easily program your car's key fob yourself with the click of a button. This is misleading.
The battery is typically held in place with an elastic clip that is easily removed. However, the circuit board contains the battery, so you will need to carefully remove the battery using an instrument. Once you've got inside, you'll be able to locate the button cell battery which is typically a small watch battery that can be found at a variety of pharmacies or at 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
There are several ways to fix a damaged or non-functioning car key fob. It is possible to resolve the issue quickly by replacing the battery or programming your key fob. However an extensive repair may be required. It can also be helpful to keep a spare fob in the event that one is lost or stolen.
Modern key fobs are more expensive and difficult to replace because they contain the physical key along with electronics. Certain "smart" fobs have a built-in remote starter. It's therefore important to know that it could 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 a button activates the transmitter, which sends an RF signal unique to the car's receiver. The receiver is able to recognize and compare the signal with 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 the fob you have purchased fail to respond or work sporadically it could indicate that they have been damaged by water or other factors. You could be able to repair the fob by taking it apart and inspecting for any broken or unresponsive buttons. If this doesn't resolve the issue, try reprogramming the fob or purchasing an entirely new fob.
Before buying a replacement key fob online, consult a professional locksmith or your local dealer to confirm that it is compatible with your vehicle's security systems. Aftermarket fobs can be cheaper, but you should research brands and read reviews prior to attempting to program them yourself. While some fobs can be replaced by a reputable locksmith others require specialized programming equipment that can only be used by a professional auto dealer or auto technician.