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Car Key Fob Repairs

Key fobs today can do much more than simply unlock and start vehicles. However, that added complexity can add up to expensive repair costs when one of them fails.

The good news is that the majority of fobs are equipped with flat-watch-style batteries that are simple to replace at home. It is possible that a simple reset is enough to make your fob work again.

Battery Replacement

A dead battery is the main reason for the fob's key not working. This is a simple fix, and it's worth a try before you spend money on a new fob. Take your car to an hardware or auto parts retailer that stocks button cell batteries and purchase a replacement. You can also consult your owner's manual (or, if 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 the particular type of fob.

Most fobs come with two halves that snap together- you'll need to gently break the sides to access the battery. You'll need a small, flat-bladed screwdriver or another tool with a small blade. You can wedge your tool into a slot on the bottom of the key fob. You may also want to watch for tiny pieces that might break loose as you work.

Insert the new battery the same manner as you removed the old one. Make sure that the positive (+) side is facing up towards the buttons, and that the negative (-) side of the battery is aligned correctly with the marks inside the battery compartment of your fob.

Push a button to test the fob. If it fails, it may be a problem with your car that needs to be fixed or replaced by a professional.

Some key fobs require special tools to open and close them, and the contacts inside can be fragile and susceptible to corroding. In these instances, a car specialist or a dealer could be your best option. When replacing a battery be patient and follow your owner's guide. You may be able to find a similar battery at a discounter or a big-box retailer but you'll have to refer to your owner's manual to be sure that it's the right one for your vehicle.

Replace the internal key

Most key fobs include the physical key mechanical that is hidden within the fob to keep it from being stolen. When navigate here in the fob dies, it leaves an internal key blank that is able to unlock trunks and doors (and in some cases, even start certain cars). Most people don't realize they can save a trip to a dealership by recharging the fob batteries. The flat watch-style battery is used in the majority of modern fobs. They can be located at auto parts stores and hardware stores. The right kind of battery is crucial, however. The wrong kind can damage the electronic circuitry and cause the battery to fail sooner.


If you try replacing the battery, and the issue persists it could be a sign something else is going on with your vehicle. If you have an owner's guide, check to see if there is a reset option available to restore the fob's original programming. If this doesn't work then you'll need to visit a dealer or an independent shop that specializes in vehicle security systems and fob programming.

Fobs can also malfunction due to 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 notice that you're required to move closer and closer to your vehicle to be able to make it work, there's a good chance the transmitter is failing.

It may be necessary for a professional to open the case of the fob to replace the transmitter. A simple screwdriver will usually suffice, but certain fobs require a special tool or special equipment that can only be purchased at a dealer. This task 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 needs a fresh battery. Because they are cheap and easily available at pharmacies and home improvement stores, it's a good first step before investing in a new car key fob.

You can also re-program your key fob by yourself If you follow some basic steps. This process can vary between vehicles, so you should consult your owner's guide and study the specific model of your vehicle. For instance, one key fob may require that the ignition be turned on while reprogramming it. A key fob might require the key to be inserted several times.

The procedure is simple. Make sure that the battery is securely in place. Then, get into the driver's seat, and close all doors, with the exception of the driver's side door. This will ensure that the new key is communicating with the vehicle properly. Then, put the old key back in the ignition and switch it to the ON position, but do not start the engine. Next press the lock button on the fob while making sure to point it towards the transmission receiver, which is typically situated on the front of the vehicle above the mirror. Within a short time frame, the key will indicate to the vehicle that it's been programmed by triggering the doors' locks or generating a chime. This procedure can be difficult 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 with fresh batteries. If the issue isn't resolved you should visit your dealer for your car or a locksmith is a good idea. A professional locksmith will have the tools and equipment required to reprogram the car fob, or even create a brand new one, if required.

Genesky says he can usually program newer fobs for around $200-$250, depending on the car. However, he's had the need to refuse customers with European models due to the fact that they don't have the costly equipment they require. Fortunately, most aftermarket fobs can be programmed but it's always best to talk to an auto dealer first to find out the price.

How do I get a brand new fob

If your key fob cannot be repaired, you might need to buy a new one. Depending on your vehicle's model and make, an auto locksmith or dealership might be able to assist. The dealership is likely to be the most expensive option to replace your fob, but it also has the tools and software necessary to program your car correctly. If you are looking for a less expensive solution, many independent locksmiths will be able to provide you with new car keys at a lower cost.

Before you rush to get a new key fob it's a good idea to try resetting your current one. The owner's manual should provide the correct method of reset. It is typically a series button presses that restores the factory programming.

You should also look over the owner's manual and warranty information to determine if you can get an alternative fob for your key. If your car is under warranty, or you have a car insurance policy or auto club membership that includes bumper-to-bumper coverage, you may be eligible to receive a reimbursement for the cost of the new fob.

Getting a fob is easy enough however finding the best location to get it done can be a challenge. If you have a relatively new car and want the assurance with knowing that your keys fobs are in good order, you may prefer going to the dealership to get this service. However, if you want a more affordable option it is usually possible to find a locksmith who is independent who can provide the same services at a much lower cost.

A professional locksmith is a good option If you're not confident doing this kind of work. They are skilled and equipped to replace or reprogram all kinds of car key fobs and they can often complete the task quickly. In addition, a locksmith will often visit your workplace or home to complete the task, which can be very convenient for some people. They can even cut and program keys on the spot when you've lost keys, which is ideal for those who don't like to leave their vehicles unattended.

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