Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs may experience issues over time, such as the loss of functionality. Certain issues may require professional attention, however many are fixable at home.
The first step is usually to change the battery. Most fobs use batteries with a flat design that are readily available at hardware stores or auto parts stores.
Dead Battery
It can be an incredibly inconvenience when the battery of a key fob dies. This is particularly true when you are far from home. There are ways to get your car back on the road in case you're keyless entry system isn't working.
One of the first things to check is whether the key fob's buttons still work. If they aren't it could be a problem in the car's locks.
If your keys will not unlock, you might find a mechanical slot within the trim around the door handles or in other places on your car (consult the owner's manual). Insert the mechanical key, and try again. If this doesn't unlock the door, some cars come with an app that allows you to unlock the door remotely. FordPass Connect MyChevrolet Mobile App, myMazda apps, for example allow owners to open their doors using their smartphones. However, these apps require an annual cost.
It is also important to ensure that your key fob isn't draining your vehicle's battery by being plugged into it. A dead key fob can drain your battery quickly especially if it's used to control your phone or TV while you're watching.
The key fob should be held right towards the start button can sometimes start a key fob with low battery. It's a simple solution that could save you a trip to the dealer or even select Interstate All Battery Center locations.
You can also find out whether your key fob actually dead by testing it in another vehicle that has push-button ignition. If it doesn't, you might need to replace the battery in your fob. It's a good idea keep an extra key fob in your bag or purse.
Damaged key car repair
If your key fob is unable to open doors or start the car remotely, it's likely that one or more of its buttons are damaged. The key fob may contain an electronic circuit board that has "contact pads" for each button, and these tiny pads are covered with an electrically conducting film which wears down over time. This wear could cause your fob to respond slower or not at all.
The good news is that the contact pad in the car key fob is easy to replace, and is done with the help of an easy flathead screwdriver. If the case is damaged or badly damaged, it will be difficult to open. You'll have to take it to an auto repair shop to get the fob repaired.
It's not uncommon for keys to be dropped on hard surfaces, tripped on or exposed to water. These events can cause physical damage to keys, which could result in them breaking or snapping them.
This can also cause internal damage to the fob and lead to an issue. This is why it's always a good idea to carry a spare key fob inside your pocket or wallet in the event that you break the one you already have.
If your key fob's buttons aren't responding in the way they should, you should first verify that the battery is in good 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. They are sold at drug, hardware, and online stores.
If the battery is fine it's possible that the buttons are worn down or dirty, and can be easily cleaned using a damp cloth to wipe them down. If the buttons don't work, you can test an alternative car key fob. This will help determine whether the issue is yours or an specific model. If the other fob works, it's likely that your key fob has to be reprogrammed or even replaced completely.
Reprogramming
The secret world of car key fobs is more complicated than the myths would suggest. The basic fobs work using radio frequency signals that are assigned to specific vehicles. The fobs need to be properly programmed in order 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 must be handled by a dealer.
Refer to the owner's manual for specific instructions. Certain manufacturers, like Mercedes have their own proprietary technology that guarantees only the dealership can create the new fob and sync it to your vehicle. Some independent shops may offer this service, so be sure to read reviews and prices prior to selecting the right shop.
Certain models of cars will erase other fobs when they're changed, so you'll have to have any additional fobs professionally programmed. This can be costly especially if the fob isn't working anymore. It's always recommended to have a spare mechanical key 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 yourself, be prepared for a gruelling journey. There are numerous guides available on the internet that promise success however, you're likely to be disappointed. Many of these guides were written by people who have no experience in this area and are often founded on unsubstantiated claims. Some even claim that you can program your car key fob with just a few clicks, which is extremely false.
The battery is usually held in place with an elastic clip that can be easily removed. However, the circuit board contains the battery, and you will need to carefully remove the battery with a tool. You should be able to locate the button cell battery. It's typically tiny batteries for watches that you can purchase at most pharmacies or at home improvement stores. Removing the battery is typically simple, and it's always a good idea to test first before replacing the entire unit.
Replacement
There are several ways to fix a damaged or damaged car key fob. It is possible to repair the issue quickly by replacing the battery or reprogramming the key fob. However it is possible that a more extensive repair may be needed. A spare fob is useful in the event that one is lost or taken.
Modern key fobs are more expensive and harder to replace since they have a physical key and electronics. Certain "smart" fobs include a remote starter built-in. As such, it's important to understand that it could take up to an hour to get an alternative key fob cut and programmed to your vehicle.
Fobs utilize a small radio transmitter on circuit boards to communicate with the car's receiver. By pressing a button the transmitter emits an RF signal that is unique to the car receiver. The receiver is able to recognize and compare the signal with preprogrammed codes. This allows drivers to start the car from a distance without the need to put the ignition key in.
If your key fob buttons are not responding or working intermittently, they could have been damaged by water. You can repair the fob if you take it apart and look for broken or non-responsive buttons. If this doesn't resolve the issue, you can try reprogramming the fob or buying an entirely new one.
It is best to check with an auto dealer in your area or a locksmith prior buying a replacement keyfob on the internet to make sure it is compatible with the security system of your vehicle. You can find aftermarket fobs cheaper, but it's important to study the brands and read reviews prior to trying to program them. While some fobs are able to be replaced by a reputable locksmith others require specialized equipment for programming that can only be used by a vehicle dealer or auto technician.