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Car Key Fob Repair – How to Get Back on the Road Even If Your Keyless Entry isn’t Working

Key fobs can experience problems over time, such as an inability to function. Some issues may need professional attention, however many can be resolved at home.

The battery replacement is usually the first step. The majority of fobs have flat watch-style batteries that are easy to find at auto parts stores.

Dead Battery

When a key fob battery fails, it can be a major hassle especially if you’re far from home. There are methods to get your vehicle back on the road in case your keyless entry system has stopped working.

The first thing you should check is if the buttons on the fob still work. If they do, then the issue may be in the locks of your car instead of the fob.

If your keys won’t unlock, you might find a mechanical slot within the trim around the door handles or in other places on your car (consult the owner’s manual). Insert the mechanical key, and try again. If this fails to unlock the door, some cars have an app that allows you to unlock it remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for example, allow owners to unlock their doors using their smartphones. These apps are charged a monthly fee for subscription.

You should also check whether your key fob won’t drain your car’s batteries by resting on them. A dead fob will drain your battery fast particularly if it’s used to control the TV or phone while you’re watching.

broken car key repair that’s low on battery can sometimes be started by holding it right up to the start button. This simple fix could save you from having to visit your dealer or to certain Interstate All Battery Centers.

You can also determine whether your key fob is actually dead by trying it in another vehicle with push-button ignition. If it doesn’t work, you might need to replace the fob battery. It’s a great idea to keep an extra key fob in your backpack or purse.

Damaged Buttons

It’s possible that your key fob has a damaged button. Your key fob is equipped with a circuit with “contact pads” that are covered with an electrically conductor film. This film wears off over time. This wear can cause your fob to respond slower or not at all.

The good news is that the contact pad on the key fob of a car can be replaced easily, and it can be done with the help of an easy flathead screwdriver. If the key fob is badly damaged or smashed in any way, it might be more difficult to open up the case, and you’ll need to take the fob into an auto repair shop to be repaired.

It’s not unusual for keys to be dropped on hard surfaces, trodden on, or exposed to water. These incidents can result in physical damage, like breaking the keys and snapping them.

It can also cause internal damage to the fob and lead to an issue. It is a good idea, so, always keep an extra fob in your purse or pocket in case the one you currently have is damaged.

If your key fob’s buttons aren’t working in the way they should, you should first check to make sure the battery is in good working condition. Key fobs do not require an electronic device. They are powered by the same two-dollar battery that is used in hearing aids and watches. These batteries are available at hardware, drug, and online stores.

If the battery is functioning properly the buttons could be dirty or worn out. You can easily clean them with a damp cloth. If they’re still not responding, try a different key fob to determine if the problem is with yours, or a specific kind of car key fob. If the other key fob functions, then yours may need to be reprogrammed or replaced.

Reprogramming

The secret world of car key fobs is more intricate than what some myths suggest. Basic fobs work with radio frequency signals that are specific to each car. The fobs need to be programmed correctly for them to open and start the car. Unfortunately, reprogramming a fob isn’t as easy as pressing a few buttons, and with a few exceptions, it must be handled by a dealer.

The procedure for reprogramming the fob is based on the model and model year of the car you own and it’s essential to refer to the owner’s manual for step-bystep instructions. Certain manufacturers, like Mercedes utilize proprietary technology that ensures only the dealership 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 before choosing the right shop.

Certain car models wipe out all other fobs once they’ve been reprogrammed, which means you’ll have to have any additional fobs professionally programmed. This can be expensive particularly if your fob is no longer working. Even if the mechanical key won’t work to start the vehicle, it’s a great idea to have a backup option that can open the trunk and doors.

Be prepared for a difficult experience if you choose to reprogram your fob by yourself. You’ll be disappointed with the numerous online guides that claim to be successful. 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 own car key fob in only a few clicks, which can be very confusing.

The battery is usually held in place with clips made of plastic, which can be easily removed. However the circuit board houses the battery, so you’ll need to pry the battery out using a tool. You should be able to find the button battery. It’s typically a small battery for watches that is available at most pharmacies or at home improvement stores. Removing the battery is typically simple, and it’s always a good idea to test first before replacing the entire device.

Replacement

If your car key fob is damaged or isn’t functioning it is important to know there are several ways to remedy the problem. It’s as simple as replacing the battery or programming the key fob but a more thorough repair may be required. It is also helpful to have a spare key fob in case one gets lost or stolen.

Modern key fobs are more expensive and difficult to replace due to the fact that they have a physical key and electronics. Certain “smart” fobs also come with a remote starter. It’s therefore important to be aware that it can take up to an hour for a new key fob cut and programmed to your vehicle.

Fobs communicate with the car’s receiver using a small radio transmitter on a circuitboard. By pressing a button the transmitter emits an RF signal that is unique to the car’s receiver. The receiver recognizes and compares the signal to preprogrammed codes. This lets the driver unlock the car and begin it from a distance, without putting the key in the ignition or turning the lock.

If the buttons on your key fob fail to respond or operate intermittently it could mean that they’ve been damaged due to water or other elements. You can repair the fob by taking it apart and look for damaged or non-responsive buttons. If this doesn’t resolve the problem, try reprogramming the fob or purchasing an entirely new fob.

You should check with an auto dealer in your area or a locksmith prior purchasing a replacement keyfob to ensure that it is compatible with the security system of your vehicle. Aftermarket fobs can be cheaper however, you must research brands and read reviews prior to attempting to program them yourself. Some fobs can be changed by an accredited locksmith and other models require programming equipment that only a mechanic or dealer is able to utilize.