Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can have issues over time, such as an inability to function. While some issues might require expert attention, most can be fixed at home.
The battery replacement is usually the first step. Most fobs use batteries with a flat design that are readily available in hardware stores or auto parts stores.
Dead Battery
It can be an incredibly inconvenience when a key fob's battery dies. This is especially true if you are away from home. Fortunately, there are ways to get back on the road even 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 work. If they don't then the issue could be with the locks on your car.
If your keys don't work you need to look for a key slot with a mechanical lock located in your door handle trim or somewhere else on the vehicle (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 can unlock doors remotely. For instance, the FordPass Connect app, myChevrolet mobile app, and myMazda app allow owners to open their doors using their smartphones. However, these apps require an annual cost.
You should also check that your key fob doesn't drain the batteries of your car by being plugged into them. A dead fob can quickly drain your battery, especially when you utilize its remote functions while watching TV or talking on the phone.
key repairs near me that's just low on battery may be started by holding it right up to the start button. This quick fix can save you from a trip to your dealer or to certain Interstate All Battery Centers.
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, it could be necessary to replace the fob battery. This is why it's a good idea to keep a spare key fob inside the bag or purse.
Damaged Buttons
If your key fob is unable to open doors or start your car remotely, it's possible that one or more of its buttons have been damaged. Your key fob likely contains a circuit board with "contact pads" for each button, and these little pads are coated with an electrically conducting film that wears down over time. The wear may make your fob respond slow or not respond at all.
The good news is that the pad inside the key fob of a car is easy to replace, and can be done so using an easy flathead screwdriver. If, however, the key fob is severely damaged or broken in any way, it may be more difficult to open the case, and you'll need to take the fob into an auto shop for repair.
It's not unusual for keys 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 affect the internals of your fob which could result in a malfunction. This is why it's always a good idea to carry an extra key fob in your purse or pocket in the event that you break the one you already have.
If the buttons on your key fob aren't responding in the way they should, first verify that the battery is in good condition. Key fobs don't need any special electronic device. They utilize 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 it's possible that the buttons are dirty or worn down, and can be easily cleaned using a moist cloth to wipe them clean. If they're still not responding, you can try a different key fob to determine if the problem is with yours, or with a specific type of car key fob. If the other fob functions it's likely that your key fob needs to be reprogrammed or even replaced completely.
Reprogramming
The secret world of car keys fobs is more complicated than most myths suggest. Basic fobs operate using radio frequency signals that are specific to each car. The fobs have to be programmed to unlock and start the vehicle. Unfortunately it's not as simple as pressing a few buttons and with a few exceptions, it has to be done by the dealer.
The process of reprogramming a fob is based on the model and model year of your car It is therefore essential to refer to the owner's manual for step-bystep instructions. Certain manufacturers, like Mercedes, use proprietary technology that ensures only dealers can create an entirely new fob and then sync it to your vehicle. However, some independent shops can provide this service too so make sure to check reviews and prices before choosing a shop.
Certain car models erase all other fobs if they are programmed again. This means that you'll have to have additional fobs programmed by a professional. This is a costly proposition particularly if you're just one functional fob. It's always recommended to have at minimum a spare mechanical key that you can use to open the doors and trunk, even if it won't start the car.
If you decide to try and reprogram your fob on your own be prepared for a frustrating journey. There are countless guides online that promise to work, 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 them even claim that you can program your car key fob in only a few clicks, which is extremely misleading.
The battery is typically held in place with an elastic clip that can be easily removed. However the circuit board houses the battery, and you'll need to remove the battery using a tool. You should be able find the button cell battery. It's usually an insignificant battery for watches that can be purchased at any pharmacies or home improvement stores. It's usually simple to replace the battery. Before replacing the whole device, you should try it first.
Replacement
There are many ways to fix a damaged or malfunctioning car key fob. A quick fix can be as easy as replacing the battery or reprogramming the key fob, however a more extensive repair may be needed. It's also beneficial to have a spare key fob in case one gets lost or stolen.
Most modern key fobs contain the physical key in addition to the electronics which makes them more expensive and more complex to replace than traditional keys. Certain "smart" fobs also include a remote starter built-in. As such, it's important to be aware that it could take up to an hour to get a replacement key fob cut and programmed for 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, and it transmits a unique RF signal to the car's receiver. The receiver receives the signal and verifies it against preprogrammed codes. This lets the driver unlock the car and begin it from a distance without placing the key in the ignition or turning a lock.
If your fob's buttons aren't responding or working intermittently, they could be damaged by water. You may be able to fix the fob by disassembling it and looking for any damaged or non-responsive buttons. If this doesn't solve the problem, you can try reprogramming your fob or purchasing another one.
Before purchasing a replacement key fob online, you should consult a professional locksmith or your local auto dealer to confirm that it is compatible with the security system of your vehicle. Fobs purchased from a third party can be cheaper however, you must research brands and read reviews prior to attempting to program them yourself. Certain fobs can be programmed by an experienced locksmith however, other models require programming equipment that only a technician in the automotive industry or dealer is able to utilize.