Now That You've Purchased Car Key Fob Repair ... Now What?
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, such as the loss of functionality. While some issues might require professional attention, many can be resolved at home.
The first step is usually to change the battery. The majority of fobs are powered by flat watches-style batteries that is easily available at hardware stores or auto parts stores.
Dead Battery
If a key fob battery fails, it can be a major inconvenience especially if you're far from home. There are ways to get back on the road the vehicle's keyless entry system isn't working.
The first thing to check is if the buttons on the key fob still work. If they do, the problem may lie in the locks of your car instead of the fob.
If your keys don't work, look for a mechanical key slot located in the trim of your door handle or on another part of the car (consult the owner's manual). Insert the mechanical key, and try again. If this fails certain cars come with an app that can unlock the doors remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for instance, allow owners to unlock their doors using their smartphones. These apps charge a monthly subscription fee.
It is also important to ensure whether your key fob won't take the car's battery away by sitting on them. A dead key fob can drain your battery, especially when you utilize its remote feature while watching TV or talking on the phone.
A key fob that's just low on battery may be activated by bringing it up to the start button. This quick fix can save you from a trip to your dealer or certain Interstate All Battery Centers.
You can also find out whether your key fob actually dead by testing it in a different vehicle that has the push-button ignition. If it doesn't work, you might need to replace the fob battery. 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 your car remotely, it's possible that one or more of its buttons have been damaged. Your key fob contains a circuit with "contact pads" which are covered by an electrically conductive film. This film wears off over time. This wear could make your fob respond slow or not respond at all.
The good news is that the contact pad on the car key fob is easy to replace, and it can be done by using a flathead screwdriver. However, if the key fob is severely damaged or broken in any way, it could be more difficult to open the case, and you'll have to take the fob to an auto repair shop to be repaired.
It's not unusual for a key fob to be dropped, trampled on or exposed to water. All of these events can result in physical damage, like bending and snapping the keys.
This could also cause internal damage to the fob, which could result in malfunction. It is a good idea, so, always keep an additional fob in your wallet or pocket in case the one you currently have breaks.
Examine the battery first to determine if your key fob buttons aren't responding like they should. Be aware that key fobs aren't a special kind of electronic device; most of them run on the same two-dollar batteries used in hearing aids and watches that are readily available at drug stores, hardware stores, and even online.
If the battery is working, it's likely that the buttons are worn down or dirty, and can be easily cleaned using a moist cloth to clean them. If they're still not responding, test a different key fob to determine if the issue is with yours, or a specific kind of car key fob. If the other fob is working, it's likely that your key fob has to be reprogrammed, or perhaps replaced entirely.
Reprogramming
The world of car key fobs is much more complex than some myths suggest. Basic fobs work with radio frequency signals that are specific to each vehicle. The fobs have to be properly programmed in order for them to be able to unlock and start the vehicle. Unfortunately the process of reprogramming a fob isn't as easy as pressing a few buttons and with only a few exceptions it needs to be handled by a dealer.
The procedure of reprogramming a fob is dependent on the manufacturer and model year of the car you own, so it's important to consult the owner's manual to get step-by-step instructions. Certain manufacturers, like Mercedes utilize proprietary technology that makes sure only dealers can create an entirely new fob and then sync it to your vehicle. However some independent shops provide this service too so make sure to check reviews and prices before choosing a shop.
Some car models will erase all other fobs once they're changed. This means that you'll need to have additional fobs programmed by a professional. This is a costly proposition, especially if you're down to one functioning fob. It's always recommended to have a 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 decide to reprogram your fob yourself. You'll be disappointed with the numerous online guides that promise success. A majority of these guides were written by individuals with no experience and are based on unsubstantiated assertions. car key fob repairs of these guides claim that you can easily program your car key fob with just a few clicks. This is false.
The battery is typically held in place by clips made of plastic, which can be removed easily. However, the circuit board contains the battery, and you will need to carefully remove the battery with the aid of a tool. Once you get inside, you'll be able locate the button cell battery which is typically a tiny watch battery that can be found at a variety of pharmacies or home improvement stores. Replacing the battery is usually a straightforward procedure, and it's always worth trying this first before replacing the entire unit.
Replacement
There are many ways to fix a broken or damaged car key fob. It is possible to resolve the issue quickly by replacing the battery or reprogramming your key fob. However an extensive repair may 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 harder to replace due to the fact that they have a physical key along with electronics. Some "smart" fobs even include a remote starter built-in. It's important to be aware that it can take an hour or more to cut and program an alternative fob for your vehicle.
Fobs communicate with the car's receiver by using a small radio transmitter built into circuit boards. Pressing an appropriate button will activate the transmitter, and it transmits a unique RF signal to the car's receiver. The receiver is able to recognize and compare the signal to preprogrammed codes. This allows the driver to unlock the vehicle and begin it from a distance, without inserting the key into the ignition or turning a lock.
If your key fob buttons aren't working or responding intermittently, they may be damaged by water. You could be able to fix the fob by taking it apart and inspecting for any broken or unresponsive buttons. If this doesn't resolve the issue, you can try reprogramming your fob or buying another one.
You should check with an auto dealer in your area or a locksmith prior to buying a replacement keyfob on the internet to ensure it is compatible with the security system of your vehicle. The fobs from the aftermarket can be less expensive, but you should look into the brands and read reviews prior to attempting to program them yourself. While some fobs can be replaced by a trusted locksmith, other models require special equipment for programming that can only be used by a professional auto dealer or auto technician.