Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can experience problems with time, like a loss of functionality. Some issues may need professional attention, but many are fixable at home.
Changing the battery is often the first step. The majority of fobs are powered by flat watches-style batteries that is easily available at hardware stores or auto parts stores.
Dead Battery
It can be a real inconvenience when a key fob's battery dies. This is especially true when you're away from home. Fortunately, there are ways to get back on the road even the car's keyless entry isn't working.
One of the first things you should check is to determine if the buttons on your key fob function. If they do not then the issue could be with the locks on your car.
If the keys won't unlock try looking for a mechanical key slot concealed in the door handle trim or in another location on the car (consult your owner's manual). Insert the mechanical key and try again. If this fails there are some cars that have an app that lets you open doors remotely. For web page , myChevrolet mobile app and myMazda app allow owners to unlock their doors using their smartphones. These apps do charge a monthly fee for subscription.
It is also important to ensure that your key fob doesn't drain your car's batteries by sitting on them. A dead fob can drain your battery fast particularly if it's used to control your phone or TV while you are watching.
A key fob that's low on battery can sometimes be activated by holding it until you hit 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 is actually dead by testing it in a different vehicle that has push-button ignition. If it's not working it's likely that the battery requires replacement. It's a good idea to keep a spare key fob in your bag or purse.
Damaged Buttons
If your key fob is unable to unlock doors or start your car remotely, it's likely that one or more of its buttons is damaged. The key fob has a circuit with "contact pads" that are covered with an electrically conductory film. The film wears off over time. This wear can cause your device to respond slow or not respond at all.
The contact pad on a car keyfob can be easily replaced using the flat-head screwdriver. If the case is damaged or badly smashed, it will be difficult to open. It is necessary to take it to an auto repair shop to get the fob repaired.
It's not unusual for a key fob to being dropped, trampled, or exposed water. These incidents can result in physical damage, like bending and snapping the keys.
It could also alter the internals of the fob which could result in an issue. It's a good idea, so, always keep a spare fob in your wallet or pocket in the event that the one you currently have is damaged.
If the buttons on your key fob aren't responding to the extent they should, you should first check to make sure the battery is in good condition. Key fobs don't need any special electronic device. They use the same two-dollar battery that is used in hearing aids and watches. They are sold at hardware, drug, and online stores.
If the battery is in good condition it's likely that the buttons are dirty or worn out and can be easily cleaned using a damp cloth to wipe them down. If they're still not responding, you can try a different key fob to determine if the issue is with yours or a specific kind of car key fob. If the other key fob is working, then yours may need to be reprogrammed or replaced.
Reprogramming
The world of car key fobs is much more complex than some myths suggest. Basic fobs work on radio frequency signals specific to each car. The fobs must be properly programmed to unlock and start the vehicle. Unfortunately, reprogramming a fob isn't as simple as pressing a few buttons and with a few exceptions, it has to be done by a dealer.
The process of reprogramming a fob depends on the make and model year of your vehicle and it's essential to read the owner's manual for step-bystep instructions. Certain manufacturers, like Mercedes, use proprietary technology that guarantees only dealerships can design an entirely new fob and then sync it to your vehicle. Some independent shops may offer this service, so be sure to read reviews and prices prior to choosing the right shop.
Some car models will erase all other fobs if they are reprogrammed. This means you'll need to have additional fobs programmed by a professional. This can be expensive particularly if your fob isn't working anymore. It is always advisable to have at minimum a spare mechanical key that you can use to open the doors and trunk even if it's not able to start the car.
If you decide to attempt to reprogram your fob yourself, be prepared for a frustrating journey. You'll be disappointed by the numerous online guides that claim to be successful. Many of these guides were written by people with no experience and are based on unsubstantiated assertions. Some even claim that you can program your car key fob in only a few clicks, which is very false.
The majority of key fobs are held in place by a clip made of plastic which is easy to remove, however, the battery is located inside the circuit board, so you'll need to carefully pull it out using a tool. Once you get inside, you should be able locate the button cell battery which is usually a small watch battery that can be found at a variety of pharmacies or home improvement stores. Removing the battery is typically an easy process, but it's always worthwhile to try first before replacing the entire unit.
Replacement
If the car key fob has been damaged or isn't functioning, it's important to know that there are several options to remedy the problem. It's as simple as replacing the battery or reprogramming the key fob, however a more extensive repair may be required. A spare fob can be helpful in the event that one is stolen or lost.
Modern key fobs are more expensive and harder to replace due to the fact that they have the physical key and electronic. Some "smart fobs" include a remote starter. Therefore, it's important to know that it could take up to an hour to get a new key fob cut and programmed for your vehicle.
Fobs utilize a small radio transmitter that is mounted on a circuit board to communicate with the car's receiver. When you press a button, the transmitter transmits an RF signal unique to the car's receiver. The receiver detects and compares the signal to preprogrammed codes. This allows drivers to start the car from a distance without the need to insert the key in the ignition.
If the buttons on your key fob aren't working or responding in a sporadic manner, they may be damaged by water. You can fix the fob by taking it apart and check for damaged or non-responsive buttons. If this doesn't fix the issue, try reprogramming the fob or purchasing a new one.
Before buying a replacement key fob on the internet, contact a professional locksmith or your local auto dealer to ensure that it's compatible with the security system of your vehicle. The fobs from the aftermarket can be less expensive, but you should study the brands and read reviews before trying to program them yourself. Certain fobs can be modified by an accredited locksmith however, other models require programming equipment that only a car technician or dealer can use.