Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs could have issues, such as a losing functionality. Certain issues may require professional attention, but many are fixable at home.
The first step is generally to replace the battery. Most fobs utilize flat watches which are easily found at auto parts stores.
Dead Battery
If the battery for a key fob dies, it can be a major inconvenience particularly if you're away from home. There are methods to get your vehicle back on the road in case your keyless entry system isn't working.
One of the first things you should check is whether the buttons on the key fob work. If they do, then the issue may be with the car's locks instead of the fob.
If the keys aren't unlocking, look for a mechanical key slot concealed in your door handle trim or on another part of the car (consult the owner's manual). Insert the mechanical key, and try again. If this doesn't unlock the door, some cars come with an application that lets you unlock it remotely. FordPass Connect MyChevrolet Mobile App, myMazda apps, for example allow owners to open their doors with their smartphones. However, these apps require an annual cost.
Also, you should ensure that your key fob isn't draining the car's battery by being plugged into it. A dead fob can drain your battery quickly, especially if it is used to control the TV or phone while you are watching.
The key fob should be held right up to your car's start button could cause an ignition key fob with low battery. This quick fix can save you from having to visit your dealer or certain Interstate All Battery Centers.
You can also find out if your key fob is actually dead by trying it in another vehicle that has push-button ignition. If it doesn't work, it could be necessary to replace the battery on your fob. This is why it's a good idea keep a spare key fob in a purse or backpack.
Damaged Buttons
It is possible that your key fob is damaged and has a button. The key fob may contain circuit boards with "contact pads" for each button, and these little pads are coated with an electrically conducting film which wears down over time. This wear could make your fob respond slower or not at all.
The good news is that the pad on the car key fob is simple to replace and is done with the help of a simple flathead screwdriver. However, if the key fob is severely damaged or broken in any way, it could be more difficult to open up the case, and you'll need to take the fob to an auto repair shop for repairs.
It's not uncommon for a key fob be thrown around, trampled upon or exposed to water. All of these can cause physical damage to keys, such as bending or snapping them.
It can also cause internal damage to the fob and cause malfunction. It's a good idea, that's why you should always carry a spare fob in your wallet or pocket in the event that the one you're currently using fails.
If your key fob's buttons aren't responding in the way they should, you should first make sure the battery is in good condition. Keep in mind that key fobs don't come with a particular kind of electronic device; most of them run on the same two-dollar batteries used in watches and hearing aids that are readily accessible at drug stores, hardware stores, and online.
If the battery is working it's likely that the buttons are just dirty or worn out, and can be cleaned using a damp cloth to wipe them down. If they're still not responding, you can test a different key fob to see whether the problem is with yours, or a specific kind of car key fob. If the other fob is working, it's likely that the key fob you have needs to be reprogrammed or perhaps replaced entirely.
Reprogramming
The world of car key fobs is more intricate than what some myths would suggest. Basic fobs operate on radio frequency signals specific to each car. The fobs must be programmed correctly in order for them to open and start the vehicle. Unfortunately, reprogramming a fob isn't as easy as pressing a few buttons, and with very few exceptions it has to be done by a dealer.
The procedure of reprogramming a fob is dependent on the manufacturer and model year of your car It is therefore essential to consult the owner's manual to get step-by-step instructions. Some manufacturers, such as Mercedes, use proprietary technology that ensures only the dealership can create an entirely new fob and then sync it with your vehicle. However, some independent shops can provide this service as well, so be sure to review reviews and prices prior to selecting the shop.
Some car models will erase all other fobs once they've been programmed, meaning you'll need to get any additional fobs professionally programmed. key fob repairs can be expensive, especially if your fob is no longer working. Even if the mechanical key won't work to start your car, it's a good idea to have a backup that can open the trunk and doors.
If you do decide to try and reprogram your fob yourself be prepared for a frustrating journey. You'll be disappointed by numerous guides on the internet that promise success. A majority of these guides were written by people with no experience and are based on unsubstantiated statements. Some of them even state that you can program your car key fob in just a few clicks, which is very confusing.
The majority of key fobs are held by a plastic clip that is easy to remove but the battery is inside the circuit board, which means you'll need to carefully pull it out using a tool. You should be able find the button battery. It's usually an insignificant battery for watches that is available at most pharmacies or home improvement stores. The replacement of the battery is generally simple, and it's always worthwhile to try first before replacing the entire unit.
Replacement
There are several ways to fix a broken or non-functioning car key fob. An easy fix could be as simple as replacing the battery or changing the program on the key fob, however a more extensive repair may be needed. It can also be helpful to keep a spare fob in case one gets lost or stolen.
Modern key fobs are more expensive and harder to replace because they contain a physical key as well as the electronics. Some "smart" fobs also include a remote starter built-in. Therefore, it's important to understand that it can take up to an hour to have an alternative key fob cut and programmed for your vehicle.
Fobs utilize a small radio transmitter that is mounted on circuit boards to communicate with the car's receiver. Pressing an appropriate button will activate the transmitter, which sends an RF signal unique to the car's receiver. The receiver detects and compares the signal to preprogrammed codes. This allows the driver to unlock the car and begin it from a distance without inserting the key into the ignition or turning the lock.
If the buttons on your key fob do not respond or operate intermittently it could mean that they have been damaged by water or other causes. It is possible to repair the fob if you take it apart and look for buttons that are not responsive or broken. If this doesn't solve the issue, you can try reprogramming the fob or purchasing a new one.
It is best to check with a local auto dealer or a locksmith before buying a replacement keyfob on the internet to make sure it is compatible with the security system of your vehicle. There are a variety of aftermarket key fobs available cheaper, but it's essential to study the brands and read reviews prior to trying to program them. Some fobs can be changed by an accredited locksmith and other models require programming equipment that only a mechanic or dealer can use.