Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs may experience issues with time, like the loss of functionality. While some issues may require professional attention, the majority are fixable at home.
Changing the battery is often the first step. Most fobs utilize flat watch-style batteries that are easy to find in hardware stores or auto parts stores.
Dead Battery
It can be a real problem when a key fob's battery goes out. This is particularly true when you are far from home. However, there are options to get back on the road if your car's keyless entry doesn't work.
One of the first things you should check is to determine if the buttons on the key fob function. If they aren't, the problem could be with the locks on your car.
If your keys don't work, look for a mechanical key slot located in your door handle trim or on another part of the vehicle (consult the owner's manual). Insert the mechanical key and try again. If this doesn't unlock the door, certain cars have an application that lets you unlock the door remotely. For example, the FordPass Connect app, the myChevrolet mobile app, and myMazda app allow owners to unlock their doors using their smartphones. However, these apps require an annual cost.
Also, make sure that your key fob doesn't drain your car's batteries by being plugged into them. A dead fob can quickly drain your battery, especially when you utilize its remote features while watching TV or speaking on the phone.
auto key repair that's low on battery can sometimes be activated by holding it up to the start button. It's a simple fix that can save you a trip to the dealer or even select Interstate All Battery Center locations.
If your key fob doesn't work, you can test it in a car with an ignition button. If it fails, the fob battery probably requires replacement. This is why it's a good idea to keep an extra key fob in a purse or backpack.
Damaged Buttons
If your key fob is unable to unlock 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. These tiny pads are covered with an electricity conducting film which wears down over time. The wear may cause your device to respond slower, or not respond at all.
The pad that contacts the car keyfob is easily replaced with the flathead screwdriver. If the key fob is badly damaged or smashed in any way, it may be more difficult to remove the case, and you'll be required to take the fob into an auto repair shop to be repaired.
It's not unusual for a key fob to be thrown around, trampled upon or exposed to water. All of these events can cause physical damage to the keys, which could result in them breaking or snapping them.
It can also cause internal damage to the fob, which could lead to an issue. This is why it's recommended to keep an extra key fob in your pocket or wallet in case you break the one you already have.
If your key fob's buttons aren't working 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 use the same battery for two dollars that is used in hearing aids and watches. The batteries are available in drug, hardware and online stores.
If the battery is good it is possible that the buttons are worn or dirty. You can easily clean them with a damp cloth. If the buttons do not work, try a different car key fob. This will help you determine if the problem is yours or a particular model. If the other key fob is working it is possible that yours needs to be reset or replaced.
Reprogramming
The world of car keys fobs is much more complicated than most myths suggest. The basic fobs function on unique radio frequency signals that are assigned to specific vehicles. The fobs must be properly programmed to unlock and start the vehicle. Unfortunately it's not as easy as pressing a few buttons, and with very few exceptions it must be handled by the dealer.
The process of reprogramming a fob depends on the make and model year of the car you own and it's essential to refer to the owner's manual for step-bystep instructions. Some manufacturers, such as Mercedes, use proprietary technology that guarantees only dealers can create the new fob and sync it with your vehicle. Some independent shops may offer this service, so make sure to check reviews and prices prior to selecting a shop.
Certain models of cars erase all other fobs if they're programmed again. This means you'll need to have any additional fobs programmed by professionals. This is a costly proposition especially if you're only down to just one working fob. Even in the event that the mechanical key will not start the car, it's a good idea to have a backup option that can open the trunk and doors.
If you decide to try and reprogram your fob yourself be prepared for a difficult journey. You'll be disappointed with the numerous online guides that promise success. A majority of these guides were written by people with no experience and are based on unsubstantiated assertions. Some of them even state that you can program your own car key fob with just a few clicks, which is extremely confusing.
The battery is usually secured with a plastic clip, which can be removed easily. However the circuit board houses the battery, so you'll need to remove the battery with the aid of a tool. Once you've gotten inside, you should be able to find the button cell battery, which is usually a small watch battery that can be found at a variety of pharmacies or at home improvement stores. Removing the battery is typically a straightforward procedure, and it's always worth trying this first before replacing the entire device.
Replacement
There are a variety of ways to fix a damaged or non-functioning car key fob. A quick fix can be as simple as replacing the battery or changing the program on the key fob, however a more extensive repair may be required. A spare fob is helpful in the event that one is stolen or lost.
Most modern key fobs include the physical key in addition the electronics which makes them more expensive and more difficult to replace than traditional keys. Some "smart fobs" even come with remote starters. It's important to understand that it can take up to an hour to cut and program an alternative fob for your vehicle.
Fobs communicate with the car receiver by using a small radio transmitter that is mounted on the circuit board. Pressing the button triggers the transmitter, and it transmits an RF signal that is unique to the car's receiver. The receiver recognizes the signal and verifies it against the preprogrammed codes. This allows the driver to unlock the car and begin it from a distance, without putting the key in the ignition or turning a lock.
If the buttons on your key fob do not respond or operate intermittently, it can indicate that they've been damaged by water or other causes. You can fix the fob by taking it apart and look for buttons that are not responsive or broken. If this doesn't solve the problem, try reprogramming or buying a new fob.
Before buying a replacement key fob online, consult a professional locksmith or your local auto dealer to make sure it's compatible with your vehicle's security systems. There are many aftermarket fobs cheaper, but it's essential to study the brands and read reviews before trying to program them. While some fobs are able to be replaced by a trusted locksmith, others require special equipment for programming that can only be used by a professional auto dealer or auto technician.