Why We Why We Car Key Fob Repair (And You Should Also!)

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

Over time, key fobs can be affected by issues such as losing functionality. While some issues may require professional attention, many can be resolved at home.

Changing the battery is often the first step. Most fobs run on a flat watch-style batteries, which is easily available in hardware or auto parts stores.

Dead Battery

It can be a major issue when a key fob's battery is dead. This is particularly true when you're away from home. There are methods to get your car back on the road if your keyless entry system isn't working.

The first thing to test is if the buttons on the key fob are working. If they do, the issue may be in the locks of your car instead of the fob.

If your keys do not unlock, there may be a mechanical slot in the trim around your door handles or in other places in your car (consult the owner's manual). Insert the mechanical key and try again. If this fails to unlock the door, some vehicles come with an app that allows you to 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. These apps do charge a monthly fee for subscription.

Also, make sure that your key fob does not take the car's battery away by sitting on them. A dead fob will drain your battery quickly especially if it's used to control the TV or phone while you are watching.

Holding the key fob right to the car's start button can sometimes start a key fob with an empty battery. It's a simple fix that will save you going to the dealer or 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's not working it's likely that the battery requires replacement. This is why it's a good idea to keep a spare key fob in your bag or purse.

Damaged Buttons

If your key fob isn't able to open doors or start the vehicle remotely, it's possible that one or more of its buttons are damaged. Your key fob contains an electronic circuit that has "contact pads" which are covered by an electrically conductor film. This film wears off over time. This wear can cause your device to respond less or not at all.

The contact pad on car keys can be easily replaced using a flathead screwdriver. If, however, the key fob is severely damaged or smashed in any way, it might be more difficult to remove the case, and you'll be required to take the fob into an auto shop for repair.

It's not unusual for a key fob to be thrown around, trampled upon, or exposed water. These incidents can cause physical damage, such as bending and snapping the keys.

It could also alter the internals of the fob, which could lead to a malfunction. This is why it's a good idea to carry a spare key fob inside your wallet or pocket in case you break the one you have.

Examine the battery first to determine if your key fob buttons aren't working as they should. Key fobs don't require an 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 functioning properly the buttons could be dirty or worn out. You can easily clean them using a damp cloth. If the buttons do not work, try an alternative car key fob. This will help you determine whether the issue is yours or a specific model. If the other fob is working it's likely that your key fob needs to be reprogrammed, or even replaced completely.

Reprogramming

The hidden world of car key fobs is much more intricate than what some myths suggest. The basic fobs operate on unique radio frequency signals that are assigned to specific vehicles. The fobs must be programmed correctly to be able to unlock and start the vehicle. Unfortunately, reprogramming a fob isn't as simple as pressing a few buttons and with very few exceptions it has to be done by a dealer.

Check the owner's manual for specific instructions. Certain manufacturers, like Mercedes utilize proprietary technology that ensures only the dealership can create a new fob and re-sync it to your vehicle. Some independent shops may offer this service, so be sure to read reviews and prices before selecting the right shop.

Certain models of cars erase all other fobs if they are programmed again. This means that you'll have to have any additional fobs programmed by professionals. This can be costly, especially if you're down to one functioning fob. Even in the event that the mechanical key will not work to start your car, it's a good idea to have a backup that can open the trunk and doors.

If you decide to attempt to reprogram your fob yourself be prepared for a difficult journey. There are many guides online that promise success but you're likely to be disappointed. Many of these guides are created by people who have no prior experience in this field, and they're often based on unsubstantiated claims. Some of these guides claim that you can easily program your car's key fob by yourself in just only a few clicks. This is misleading.

Most key fobs are held by a clip made of plastic that's easy to loosen, however, the battery is located inside the circuit board, which means you'll need to carefully pry it out using a tool. You should be able to find the button battery. This is usually tiny batteries for a watch that you can purchase at most home improvement or pharmacies. Removing the battery is typically simple, and it's always worthwhile to try first before replacing the entire unit.

Replacement

If your car key fob is damaged or isn't functioning it is crucial to know there are several ways to address the issue. A quick fix can be as easy as replacing the battery or programming the key fob but a more in-depth repair might be required. It is also helpful to keep a spare fob in case one is lost or stolen.

Modern key fobs are more expensive and more difficult to replace due to the fact that they have an actual key and electronic. Certain "smart" fobs also include a remote starter built-in. It's important to be aware that it can take up to an hour to cut and program the replacement fob to your vehicle.

Fobs communicate with the car receiver by using a small radio transmitter on circuit boards. Pressing an appropriate button will activate the transmitter, and it transmits an RF signal unique to the car's receiver. The receiver recognizes the signal and validates it against the preprogrammed codes. This allows a driver to start the car from a distance without having to put the key in the ignition.

If  how to repair car key fob  on your key fob are not responding or working intermittently, they could be damaged by water. You could be able to fix the fob by removing it and looking for any damaged or non-responsive buttons. If this doesn't solve the issue, you can try reprogramming it or purchasing a new fob.

Before purchasing a replacement key fob online, seek out an expert locksmith or your local auto dealer to confirm that it is compatible with your vehicle's security systems. Aftermarket fobs can be cheaper, but you should look into the brands and read reviews before trying to program them yourself. Some fobs can be changed by an accredited locksmith however, other models require programming equipment that only a mechanic or dealer can use.