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. Certain issues may require professional attention, but most can be resolved at home.
The first step is usually to change the battery. Most fobs use flat watches that are readily available at hardware stores or auto parts stores.
Dead Battery
It can be an incredibly problem when the battery of a key fob is dead. This is especially the case when you are far from home. Fortunately, there are ways to get back on the road when your vehicle's keyless entry system isn't working.
One of the first things you should check is whether the buttons on your key fob function. If they do, then the issue could be with the car's locks instead of the fob.
If the keys won't unlock, look for a mechanical key slot hidden in the door handle trim or somewhere else on the car (consult your owner's manual). Insert the mechanical key and try again. If this doesn't work, some cars have an app that allows you to unlock doors remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for instance let owners unlock their doors using smartphones. However, these apps are subject to a monthly 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 fob can quickly drain your battery, particularly when you use its remote functions while watching TV or speaking on the phone.
A key fob that's just low on battery can be activated by bringing it up to the start button. It's a quick fix that will save you a trip to the dealer or even select Interstate All Battery Center locations.
If your key fob does not work, you can test it in a car with an ignition button. If it doesn't work, it could be necessary to replace the battery in your fob. It's a good idea keep an extra key fob in your backpack or purse.
Damaged Buttons
It's possible that your key fob is damaged and has a button. The key fob may contain an electronic circuit board that has "contact pads" for each button, and these tiny pads are coated with a conductor of electricity which wears down over time. This wear could cause your fob to respond slow or not respond at all.
The good news is that the pad inside a car key fob is easy to replace, and it can be done using a simple flathead screwdriver. If, however, auto key repair is severely smashed or harmed 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 common for a key fob be thrown around, trampled upon, or exposed water. These incidents can cause physical damage, such as breaking the keys and snapping them.
This can also cause internal damage to the fob and cause a malfunction. This is why it's always recommended to keep a spare key fob inside your purse or pocket in case you break the one you already have.
Make sure the battery is charged first If your key fob's buttons aren't working like they should. Be aware that key fobs aren't any special kind of electronic device; the majority of them use the same two-dollar batteries used in watches and hearing aids, which are readily accessible at drug stores, hardware stores, and on the internet.
If the battery is working it's possible that the buttons are just dirty or worn out, and can be cleaned by using a damp cloth to wipe them down. If the buttons still don't work, try another car key fob. This will help determine whether the issue is yours or an specific model. If the other key fob functions it is possible that yours needs to be reprogrammed or replaced.
Reprogramming
The hidden world of car keys fobs is more complicated than most myths suggest. The basic fobs operate using radio frequency signals that are assigned to specific vehicles. The fobs have to be properly programmed in order to be able to unlock and start the car. Reprogramming a key fob is not as simple as pressing several keys. It's usually done by the dealer.
Refer to the owner's manual for specific instructions. Some manufacturers, like Mercedes have proprietary technology that only dealers are capable of creating a brand new key fob, and then sync it to your vehicle. Some independent shops might offer this service, so check reviews and prices before selecting a shop.
Certain car models erase all other fobs once they're programmed again. This means you'll need to have any additional fobs programmed by a professional. This is an expensive proposition, especially if you're just one functional fob. Even in the event that the mechanical key will not work to start the vehicle, it's a good idea to have a backup option that can open the doors and trunk.
Be prepared for a gruelling experience if you decide to reprogram your fob yourself. You'll be disappointed by the numerous online guides that promise success. A lot of these guides were written by people with no experience and are based on unsubstantiated assertions. Some of these guides claim that you can program your car key fob yourself with the click of a button. This is misleading.
Most key fobs are held by a plastic clip that is easy to remove however, the battery is located inside the circuit board, so you'll need to carefully pull it out with a tool. You should be able to locate the button cell battery. This is usually tiny batteries for a watch, which can be purchased at any pharmacies or at home improvement stores. Replacing the battery is usually a straightforward procedure, and it's always worth trying this first before replacing the entire device.
Replacement
There are many ways to fix a damaged or malfunctioning car key fob. It is possible to repair the issue quickly by replacing the battery or programming your key fob. However it is possible that a more extensive repair might be required. It is also helpful to keep a spare fob in case one gets lost or stolen.
Modern key fobs are more expensive and difficult to replace since they have the physical key along with electronic. Some "smart fobs" even come with remote starters. It's important to be aware that it could take an hour or more to cut and program an alternative fob for your vehicle.
Fobs communicate with the car's receiver using a tiny radio transmitter on the circuit board. By pressing a button, the transmitter sends an RF signal unique to the car receiver. The receiver receives the signal and verifies it against the preprogrammed codes. This lets the driver unlock the vehicle and start it from a distance, without placing the key in the ignition or turning the lock.
If your fob's buttons aren't responding or working in a sporadic manner, they may have been damaged by water. It is possible to repair the fob by taking it apart and examining it for broken or unresponsive buttons. If this does not solve the issue, try reprogramming or buying an entirely new fob.
Before buying a replacement key fob online, seek out an expert locksmith or your local auto dealer to confirm that it is compatible with your vehicle's security systems. Aftermarket fobs can be cheaper, but you should look into the brands and read reviews prior to attempting to program them yourself. 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.