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Key fobs today are more than just a way to unlock and start vehicles. This added complexity can cause costly repair costs if it breaks.
The good news is that the majority of fobs have flat-watch-style batteries that are simple to replace at home. It is possible that a reset can get yours working again.
Battery Replacement
The most frequent reason the key fob ceases to function is due to the battery being dead. It’s a simple fix, and it’s worth trying before you decide to spend money on a new fob. You can purchase an additional button cell battery at your local auto part retailer or hardware store in the event that you already have one. You can also consult the owner’s manual (or in the case that you don’t have one, YouTube is full of videos from people explaining how to do it) for specific instructions on opening and replacing the battery in your particular type of fob.
Most fobs come with two halves that snap togetherYou’ll need to pull the sides apart to get to the battery. You’ll usually need a small screwdriver or some other tool that has a flat, thin blade. It may be helpful to look for a groove along the lower edge of the fob that you can use to place your tool between. You might also want to look for small pieces that could be loosened while working.
When you have your new battery, you can insert it in the same manner that you removed the old one. The positive (+) side should be facing the buttons and the reverse (-) the marks on the compartment for the battery.
Check the fob to determine whether it functions by pressing a button. If it doesn’t work, there might be a problem with your vehicle that needs to be fixed or replaced by a specialist.
Certain key fobs require special tools to open, and the contacts inside may be delicate and easily corroded. In these cases the best solution is to consult a car specialist or a dealer. When replacing a battery, be gentle and follow your owner’s guide. You may be able to locate a battery similar at a big-box store or discounter, however, make sure to check the owner’s manual to make sure it’s compatible with your vehicle.
Replace the internal key
Most key fobs contain the physical key mechanical, but it’s hidden inside the fob to prevent thieves. When the battery in a fob dies and the key is discarded, a blank one is left behind, which can be used to unlock doors and trunks. In certain cases it is possible to start certain cars. Most people aren’t aware of this however, they can save from a trip to the dealer by simply replacing the fob’s battery. The flat watch-style batteries are used in most modern fobs. These batteries can be found at hardware and auto parts stores. It is important to use the correct type of battery. A wrong battery can harm the circuitry and lead to the fob’s failure much sooner.
If you try replacing the battery and discover that the issue persists, it could be a sign that something else is going on with your car. Go through the owner’s manual to determine if you have an option to reset the fob and restore the fob’s factory-setup. If this doesn’t help, you’ll need to visit a dealer or an independent shop that specializes in vehicle security systems and fob programming.
Fobs may also malfunction because of faulty transmitter receivers. They are typically placed on the dashboard or next to the steering wheel, and they send signals that allow you to unlock and start your car with the fob. If you’re being required to get closer and closer to your vehicle to be able to make it work, there’s a good possibility that the transmitter is not working.
A professional might need to open the case of the fob to replace the transmitter. A simple screwdriver is usually enough to do the trick, but some fobs require a specialized tool or equipment that can only be purchased at a dealer. This is a job that should be performed by a certified mechanic to avoid damaging the fob as well as yourself.
Reprogramming the Key
A key fob that is not functioning simply requires a new battery. Because they are cheap and readily available in pharmacies and home improvement stores, it’s a good first step before purchasing the purchase of a new car key fob.
Alternately, you might be able to reprogram the fob by following the steps. The procedure varies for different vehicle makes, so it’s important to read the owner’s manual as well as research the specifics of the model you own. A key fob may require the ignition to be turned on while reprogramming. Another might need the key to be inserted and removed several times.
The basic procedure is simple. First, make sure the new battery is securely in place. Then, sit in the driver’s seat and close all doors, with the exception of the driver’s side door. This will ensure the new key is communicating with the vehicle correctly. After that, put the old key back into the ignition and turn it to the ON position, but do not start the engine. Press the lock button while aiming the fob towards the transmission receiver. This is typically located on the front, above the mirror. Within a short time frame the key will announce to the vehicle that it’s being programmed by cycling the doors locks or emitting a chime. This process can be tricky so it’s essential to be attentive to the timing and to not over-press the key button.
If the key fob still isn’t working, try reprogramming it again using new batteries. If the issue persists, a visit to your car dealer or locksmiths should be considered. A professional will have the tools and equipment to reprogram your car’s fob, or create an entirely new key if required.
Genesky says he can usually program newer fobs for around $200-$250, based on the model of vehicle. Genesky has experienced European models turned away because he lacks the expensive equipment needed. Fortunately, most aftermarket fobs can be programmed but it’s always best to talk to a car dealer first to see what their price is.
Getting a New Fob
If your key fob is damaged beyond repair, you could need to purchase an entirely new one. Depending on the model and make, an auto locksmith or dealership may be able help. The dealership will likely be the most expensive alternative for replacing a fob However, they’ll have all the required tools and software needed to program your car correctly. Many locksmiths in independent shops offer a new car key fob for the lower cost.
It’s a good idea to attempt to reset your current device before you rush out to buy a new one. The owner’s manual should outline the correct method of reset. This is usually the result of a series of button presses that restores the factory programming.
It’s also a good idea to review your owner’s manual as well as warranty information before deciding the best place to get an replacement fob for your key. If your car’s warranty in good standing or you have an auto club or insurance policy that covers bumper to bumper you could qualify for a reimbursement of the cost of replacing the fob.
Getting a fob is easy enough however, finding the right place to have it done can be a challenge. If you own a new vehicle and you want the assurance with knowing that your keys fobs are in good condition, you may be better off visiting the dealership to get this service. If you are looking for a cheaper alternative, it’s possible to find a locksmith that can provide the same service for an affordable cost.
A locksmith professional is a good option if you’re not comfortable doing this type of work. They are skilled and equipped to replace or reprogram the majority of car key fobs and they can often complete the task quickly. A locksmith is also able to visit your office or home which is a great option for many. They can even cut and program keys on-site when you’ve lost keys, which is great for those who don’t like to leave their cars unattended.