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, including the loss of functionality. Certain issues might require professional attention, but most can be resolved at home.
Changing the battery is often the first step. Most fobs use flat watch-style batteries which are easily found at auto parts stores.
Dead Battery
If a key fob battery is dead, it could be a huge inconvenience particularly if you're away from home. There are methods to get your vehicle back on the road if your keyless entry system isn't working.
One of the first things to be sure of is to determine if the buttons on your key fob work. If they do, the issue may be with the car's locks instead of the fob.
If the keys aren't unlocking, look for a key slot with a mechanical lock concealed in your door handle trim or in another location on the car (consult your owner's manual). Insert the mechanical key and try again. If this doesn't unlock the door, some vehicles have an application that lets you unlock the door remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for example allow owners to open their doors using their smartphones. These apps charge monthly subscription fees.
Also, make sure whether your key fob won't drain your car's batteries by resting on them. A dead fob will drain your battery quickly particularly if it's used to control your phone or TV while you're watching.
Holding the key fob right towards the start button can sometimes start a key fob with low battery. It's a quick solution that could save you going to the dealer or even select Interstate All Battery Center locations.
You can also determine whether your key fob is actually dead by trying it in another vehicle that has push-button ignition. If it fails, the fob battery probably requires replacement. This is why it's a good idea keep an extra key fob in the bag or purse.
Damaged Buttons
If your key fob doesn't have the ability to unlock doors or start the car remotely, it's likely that one or more of its buttons have been damaged. The key fob may contain a circuit board with "contact pads" for each button. These little pads are coated with an electricity conducting film which wears down over time. This wear can cause your fob to respond slower, or not respond at all.
The pad that contacts car keys can be easily replaced using an flathead screwdriver. If the case is damaged or badly damaged it will be difficult to open. It is necessary to take it to an auto shop to get the fob repaired.
It's not common for a key fob being dropped, trampled or exposed to water. These incidents can cause physical damage, including breaking and snapping keys.
This could also cause internal damage to the fob that could result in a malfunction. This is why it's always recommended to keep a spare key fob in your wallet or pocket in case you accidentally break the one you have.
Make sure the battery is charged first if your key fob buttons are not responding in the way they should. Key fobs do not require a special type of electronic device. They use the same two-dollar battery that is used in hearing aids and watches. They are sold in drug, hardware and online stores.
If the battery is in good condition it's likely that the buttons are dirty or worn down, and can be easily cleaned using a moist cloth to wipe them clean. If the buttons do not work, you can test another car key fob. This will help you determine if the problem is yours or an specific model. If the other fob works then it's likely the key fob you have needs to be reprogrammed, or possibly replaced entirely.
Reprogramming
The hidden world of car keys fobs is more complex than many myths suggest. Basic fobs operate with radio frequency signals that are specific to each vehicle. The fobs need to be correctly programmed to unlock and begin the vehicle. Unfortunately it's not as easy as pressing a few buttons and with only a few exceptions it has to be done by the dealer.
The procedure of reprogramming a fob is dependent on the manufacturer and model year of your vehicle and it's essential to consult the owner's manual to get step-by-step instructions. Certain manufacturers, such as Mercedes utilize proprietary technology that only dealers are capable of creating a brand new key fob and resync it to your vehicle. Some independent shops might offer this service, so be sure to read reviews and prices before choosing a shop.
Certain models of cars erase all other fobs if they are changed. This means that you'll need to have additional fobs programmed by an expert. This can be expensive particularly if your fob isn't working anymore. It's always recommended to have at least one spare mechanical key you can use to open the trunk and doors even if it's not able to start the car.
Be prepared for a gruelling experience if you choose to reprogram your fob by yourself. There are many guides online that promise success, but you'll likely be disappointed. A lot of these guides were written by individuals with no experience and are based on unsubstantiated statements. Some of them even state that you can program your car key fob in only a few clicks, which can be very confusing.
The majority of key fobs are held in place by a clip made of plastic that's easy to loosen, but the battery is inside the circuit board, so you'll need to carefully pull it out using a device. Once you've gotten inside, you'll be able to locate the button cell battery which is typically a small watch battery that is available at a variety of pharmacies or at home improvement stores. Removing the battery is typically a straightforward procedure, and it's always worthwhile to try first before replacing the entire device.
Replacement
If the car key fob is damaged or has stopped working it is crucial to know there are several ways to remedy the problem. 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. It is also helpful to have a spare key fob in case one is lost or stolen.
Most modern key fobs contain an incredibly small physical key in addition to the electronic components which makes them more expensive and more difficult to replace than traditional keys. Some "smart fobs" include remote starters. It's important to be aware that it could take up to an hour to cut and program the replacement fob to your vehicle.
Fobs communicate with the car's receiver by using a small radio transmitter that is mounted on the circuit board. By pressing a button, the transmitter emits an RF signal unique to the car receiver. The receiver recognizes and compares the signal to preprogrammed codes. This allows a driver to start the car from a distance, without the need to insert the key in the ignition.
If remote car key repairs on the fob you have purchased fail to respond or function intermittently it could indicate that they've been damaged due to water or other elements. You could be able to fix the fob by removing it and looking for any damaged or unresponsive buttons. If this doesn't solve the problem, try reprogramming it or purchasing an entirely new fob.
Before you purchase a replacement fob on the internet, contact an expert locksmith or your local auto dealer to make sure it's compatible with the security system of your vehicle. The fobs from the aftermarket can be less expensive however, you must study the reviews and brands before trying to program them yourself. remote car key repair can be changed by an experienced locksmith, but other models require programming equipment that only a technician in the automotive industry or dealer can utilize.