Key fobs today do a lot more than just unlock and start vehicles. This added complexity can result in costly repairs if it breaks.
The good news is that the majority of fobs use flat watch-style batteries that are simple to replace at home. You may even find that a reset will bring it back to life.
Battery Replacement
A dead battery is the main reason for a key fob not working. This is easy to repair, and is worth a try before you decide to spend money on a new key fob. You can buy an additional button cell battery at your local auto part retailer or hardware store if you have one. You can also consult your owner's guide (or YouTube for videos explaining how to replace the battery) to get specific instructions on how to replace and open the battery in your fob.
You'll need to gently pry away the sides of the majority of fobs in order to access the battery. You'll need a small flat-bladed screwdriver or another tool with a blade that is thin. It might help to look for a notch on the bottom of the fob which you can use to put your tool in between. It is also advisable to keep an eye out for small pieces that might break loose while working.
Install the new battery in the same manner as you removed the old one. Make sure the positive (+) side is facing upwards toward the buttons and that the negative (-) side of the battery is aligned with the markings in the battery compartment of your fob.
Check the fob to determine if it works by pushing the button. If it doesn't work, you may have an issue with your car that requires a professional to repair or replace.
Certain key fobs are difficult to open and the contacts may be fragile and easily corrosion-prone. In these situations the best solution is to speak with a specialist or dealer. If you're in need of replacing a battery, try to be gentle and follow the specific instructions in your owner's manual. You may be able to locate the same battery at a big-box retailer or discounter, however, make sure you read the owner's manual to ensure that it's compatible with your vehicle.
Replace the internal key
Most key fobs contain the physical key mechanical that is hidden within the fob to stop thieves from getting. When the battery in the fob goes out it will leave a blank key left behind and can be used to unlock trunks and doors. In some cases it is possible to start certain cars. Most people aren't aware of this, but they can save a trip to the dealership by simply replacing the fob battery. Most modern fobs use flat-watch-style batteries which are readily available in hardware stores and auto parts shops. Using the correct type of battery is essential, however. The wrong kind can damage the electronic circuitry, causing the fob to fail sooner.
If the problem persists after you replace the battery, it could be a sign that something else is wrong with your vehicle. Review the owner's manual of your vehicle to see if there's an option to reset the fob and restore the fob's factory-setup. If that doesn't help, you'll need to go to a dealership or an independent shop that specializes in vehicle-security systems and fob programming.
Fobs could also fail due to malfunctioning transmitter receivers. These are usually built into the dashboard or near the steering wheel, and transmit signals that allow you to unlock and start your car using the fob. If you're having to get closer and closer to your vehicle to be able to make it work, there's a great chance that the transmitter isn't working.
It may be required for a professional to remove the case of the fob in order to replace the transmitter. A simple screwdriver will usually do the job however, some fobs have complex release mechanisms that require a special tool or specialized equipment available only at a dealership. It is a good idea to have a qualified mechanic handle this job to ensure you don't accidentally break the fob or cause injury to yourself.
Reprogramming the Key
A key fob that is not working could just require an upgrade in battery. They are easily available in home improvement and pharmacy stores and are cheap. This is a great way to start before buying the new key fob.
Alternately, you might be able to reprogram the fob yourself by following the steps. This procedure can differ between vehicles, so it is recommended to read the owner's manual and research your specific model. A key fob may require that the ignition switch be turned on while reprogramming. One key fob may require the key to be inserted several times.
The process is straightforward. Make sure that the battery is securely in place. Close all doors, with the exception of the driver's door. This will ensure that the new key fob communicates with the vehicle correctly. Put the old key in the ignition, turn it on, but don't start the engine. Press the lock button while aiming the fob towards the transmission receiver. It is usually located on the left side, just above the mirror. Within car key fob repair near me will announce to the vehicle that it's been programmed by turning off the doors' locks or emitting an emitted sound. This can be a difficult process so it's essential to pay attention to the timing and don't over-press the key button.
If the key fob won't work after reprogramming, try using new batteries. If the problem persists, a visit to your dealer for your car or a locksmith is a good idea. A professional will have all the tools and equipment required to reprogram your car's fob or design a new one, if required.
Genesky says he's able to program newer fobs that range between $200 and $250, depending on the vehicle. However, he's had to turn away customers with European models because they don't have the costly equipment required. A majority of the aftermarket fobs are programmed, but you should always check with your local dealer to find out the cost.
Finding a New Fob
If your key fob is beyond repair, you may need to purchase an entirely new one. Based on the model and make, an auto locksmith or dealership may be able help. The dealership is likely to be the most expensive choice for a replacement fob however, it will also have the tools and software required to program your car correctly. Many locksmiths in independent shops offer a brand new car key fob for an affordable price.
Before you purchase a new key fob it's an excellent idea to try resetting your current device. Your owner's manual should outline the proper reset procedure, which is usually just pushing a few buttons which restores the factory settings.
It's also a good idea to review your owner's manual and warranty information before deciding the best place to get an replacement fob for your key. If your car is under warranty or you have a car insurance policy or auto club membership that provides bumper-to-bumper insurance, you might be able to receive some reimbursement for the cost of an entirely new fob.
The process of getting a fob can be simple enough however, finding the right place to have it done can be a challenge. You may want to go to the dealer for this service if you have a newer vehicle and you are looking to feel secure knowing that your key fobs work properly. However, if you're looking for an option that is more affordable it is usually possible to find a locksmith independent who can provide the same services for a significantly lower price.
A locksmith who is professional is a good option for those who aren't comfortable with this type of work. They are equipped and trained to change or reprogram car key fobs of all kinds and can do it quickly. Locksmiths can also visit your office or home, which is convenient for many people. They can cut and program keys on the spot in case you've lost them. This is perfect for those who do not want to leave their car without a key.
