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What's Next In Car Key Fob Repair
Car Key Fob Repairs

Key fobs of today do a lot more than unlock and start cars. However, that added complexity can add up to costly repairs in the event that one of them malfunctions.

The good news is that the majority of fobs are equipped with flat-watch-style batteries that are simple to replace at home. And you may find that a reset will make your device work again.

Battery Replacement

The most frequent reason why that a key fob doesn't work is because of an inoperative battery. This is easy to fix, and it's worth trying before you go spending money on a new fob. You can purchase a new button cell battery at your local auto part store or hardware retailer if you have one. You can also refer to the owner's manual (or YouTube for videos explaining how to replace the battery) to get specific instructions on how to open and replace the battery in your fob.

You'll need to gently pry apart the sides of most fobs to access the battery. You'll need a small flat-bladed screwdriver, or another tool with a small blade. It might help to look for a groove along the bottom of the fob that you can wedge your tool between. It is also advisable to watch for tiny pieces that might break loose while you work.

When you have your new battery, insert it in the same manner that you removed the old one. Make sure that the positive (+) side is facing upwards towards the buttons and that the negative (-) side of the battery is aligned correctly with the markings inside the battery compartment of your fob.

You can push a button to test the fob. If it doesn't work, there may be a problem with your car that needs to be fixed or replaced by a specialist.

Some key fobs require special tools to open and close them, and the contacts inside can be fragile and easily corroded. In these situations the best solution is to talk to a specialist or dealer. When replacing a battery be gentle and follow the owner's instructions. You may be able find an identical battery in a big-box store or discounter, however, make sure you read your owner's guide to ensure it is compatible with your vehicle.

Replace the internal key

The majority of key fobs have an actual mechanical key that is hidden within the fob to stop thieves from getting. When the battery in the fob dies it leaves an internal key blank that is able to unlock doors and trunks (and in some cases, start certain cars). Most people aren't aware of this however, they can save having to go to the dealership by simply replacing the fob's battery. Most modern fobs use flat watches-style batteries that are easy to find in auto parts stores and hardware shops. Using the correct type of battery is important, however. A wrong battery can harm the circuitry and cause the fob to fail much earlier.

If the issue persists after you replace the battery, it could be a sign that something else is wrong in your vehicle. Review the owner's manual of your vehicle to determine if you have an option to reset the fob and bring the fob back to factory-setup. If this doesn't help, you'll need to visit a dealership or an independent shop that is specialized in vehicle security systems and fob programming.

Fobs can also malfunction due to malfunctioning transmitter receivers. They are typically placed on the dashboard or close to the steering wheel, and transmit signals that allow you to unlock and start your car using the fob. You may have to move closer to your car to make it work.

A professional might need to open the case of the fob to replace the transmitter. A simple screwdriver will usually suffice, but certain fobs require a specific tool or equipment that can only be found at a dealer. This job should be done by a qualified 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 these batteries are cheap and easily available at pharmacies and home improvement stores, it's the ideal first step before purchasing a new car key fob.

You may also be able to re-program the fob by following some basic steps. The procedure varies for different vehicle brands, so it's essential to refer to the owner's manual and study the specifics of your particular model. For instance the key fob might require that the ignition be on while reprogramming it. A key fob might require the key to be inserted multiple times.

The general process is simple. Make sure the battery is securely in place. Then, get in the driver's seat, and close all doors, with the exception of the driver's side door. This will ensure that the new key fob is communicating with the vehicle in a proper manner. After that, put the old key back into the ignition and turn it to the ON position, but don't start the engine. Then, press the lock button on the fob while aiming it at the transmission receiver, which is usually located in the front of the car above the mirror. Within a brief time the key will announce to the vehicle that it's been programmed by triggering the doors locks or emitting an emitted sound. This can be a difficult process, so it's important to be attentive to the timing and not to over-press the key button.

If the key fob doesn't work try reprogramming it with new batteries. If the issue persists, you might want to visit your car dealer or locksmith. A professional locksmith will have the tools and programming equipment necessary to re-program your car's fob or make an entirely new key if required.

Genesky claims he is able to program newer fobs between $200 and $250, based on the vehicle. However, he's had the need to turn down customers who have European models due to the fact that they don't have the costly equipment required. Most aftermarket fobs can be programmed, but always consult your local dealer to find out the cost.

How do I get a new fob

If the key fob you have cannot be fixed, you could require another one. Depending on key car repair and model, an auto locksmith or dealership might be able to assist. The dealership is likely to be the most expensive alternative for replacing a fob, but they will also have all of the necessary tools and software needed to programme your vehicle properly. If you're looking for a cheaper option, a number of independent locksmiths will be able to provide you with new car keys for a more affordable price.

Before you purchase a new fob it's recommended to consider resetting your current one. The owner's manual should explain the correct procedure for reset that is typically pushing a few buttons which restores the original programming.


It's also a good idea to check the owner's manual and warranty information prior to deciding the best place to get a key fob replacement. If your car's warranty in good standing or you have an auto club or car insurance policy that covers bumper-to-bumper you could qualify for a reimbursement of the cost of a replacement fob.

Finding the right place to get a fob can be a challenge. If you have a relatively new car and would like the peace of mind that comes with knowing that your keys fobs are in good condition, you may be better off visiting the dealership for this service. If you're seeking a less expensive alternative, it's possible to find a locksmith that will offer the same service at a lower price.

If you aren't comfortable handling this kind of work yourself, a professional locksmith can be a great choice. They are trained and equipped to repair or replace all kinds of car key fobs and often they can accomplish the task in a short time. A locksmith can also come to your house or office which is a great option for many people. They can even cut and program keys on-site when you've lost them, which is ideal for those who don't like to leave their cars in the dark.

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