Car Key Fob Repair: 11 Things You're Leaving Out

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Car Key Fob Repairs

Key fobs today can do more than unlock and start vehicles. However, that added complexity can result in expensive repair costs when one of them fails.

The good news is that the majority of fobs use flat watch-style batteries that are easy to replace at home. It is possible that a reset will get yours working again.

Battery Replacement

A dead battery is the most frequent reason for the fob's key not working. It's a simple fix and worth trying before you invest in a replacement fob. You can purchase the new button cell at your local auto part retailer or hardware store in the event that you already have one. You can also check the owner's manual (or in the event 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.

You'll need to gently pull away the sides of the majority of fobs to reach the battery. It's usually a screwdriver or another tool with a thin, flat blade. You can put your tool into a notch at the bottom of the key fob. It is also advisable to keep an eye out for tiny pieces that might break loose while working.

Insert the new battery in the same way as you removed the old one. The positive (+) side should be facing the buttons and the negative (-) the markings on the battery compartment.

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

Certain key fobs require special tools to open and close, and the connections inside could be fragile and susceptible to corroding. In these cases, a car specialist or the dealer will likely be the best option. When replacing a battery be gentle and follow the owner's instructions. You might be able to find a battery similar at a big-box store or discounter, however, make sure you read the owner's manual to ensure that it's compatible with your vehicle.

Replacing the Internal Key

To protect against theft, the majority of key fobs have a mechanical key hidden inside. If the battery of the fob fails, it leaves behind a blank internal key that is able to unlock doors and trunks (and in some cases start certain vehicles). Most people aren't aware of this, but they can save having to go to the dealership by simply replacing the fob's battery. The flat watch-style batteries are used in most modern fobs. These batteries are easily found at auto parts stores and hardware stores. The right kind of battery is important, however. The wrong kind can damage the electronic circuitry, causing the fob to fail much faster.

If the problem continues to persist even after you have replaced the battery, it could be an indication that there is something else wrong with your vehicle. Go through the owner's manual to determine if there's a reset procedure that will restore the fob's the factory program. If this doesn't work, you'll need to visit a dealership or an independent shop that is specialized in vehicle security systems and fob programming.

Fobs could also fail due to malfunctioning transmitter receivers. They are typically placed on the dashboard or near the steering wheel, and transmit signals that allow you to open and start your car using the fob. It is possible that you will need to get closer to the car in order to make it work.

A professional may need to open the fob's case to replace the transmitter. A simple screwdriver is enough to get the job done, but some fobs have complicated release mechanisms that require a special tool or specialized equipment available only at a dealership. This job must be handled by a certified mechanic to avoid damaging the fob and yourself.

Reprogramming the Key

A key fob that is not functioning just requires a new battery. Since these batteries are inexpensive and easily available at pharmacies and home improvement stores, it's an excellent first step prior to purchasing a new car key fob.

Alternatively, you may be able to re-program the fob yourself by following the steps. The process is different for different vehicles brands, so it's essential to refer to the owner's manual and research the specifics of your model. A key fob may require that the ignition be switched on when reprogramming. A key fob might require the key to be inserted multiple times.

The general process is simple. First, make sure that the new battery is in place. Close all doors except the driver's door. This will ensure the new key is communicating with the vehicle properly. Place the old key in the ignition, then turn it on, but do not start the engine. Press the lock button while aiming the fob toward the transmission receiver. This is usually located on the left side, just above the mirror. The key will signal to the vehicle within a brief amount of time that it is being programmed. This can be accomplished by turning the door locks, or emitting an audible chime. This procedure can be difficult and it's crucial to be aware of the timing and don't over-press the key button.

If the key fob does not work after reprogramming it, try using a new battery. If the issue isn't resolved then a visit to your car dealer or a locksmith should be considered. A professional will have all the tools and equipment needed to reprogram your car's fob or design a new one if necessary.

Genesky claims he is able to program newer fobs that range between $200 and $250, based on the vehicle. However, he's had the need to turn away customers with European models G28 because there's no equipment they require. Fortunately, many aftermarket fobs can be programmable but it's always best to talk to the dealer of your choice first to find out the price.

How do I get a brand new fob

If your key fob is beyond repair, you might need to get an alternative. Depending on your vehicle's make and model, an auto locksmith or dealership might be able to assist. The dealership is likely to be the most expensive option for a replacement fob However, they'll have the necessary tools and software to program your vehicle correctly. If you're looking for a cheaper solution, many independent locksmiths will be able to provide you with a brand-new car key fob at a lower price.

It's a good idea to attempt to reset the fob you have before you make the decision to purchase another one. The owner's guide should explain the correct reset procedure. This is usually an orderly press that restores the factory programming.

It's also a good idea to read your owner's manual as well as warranty information prior to deciding which place to go for an replacement fob for your key. If your vehicle is under warranty, or you have a car-insurance policy or auto club membership that includes bumper-to-bumper coverage, you may be able to receive some reimbursement for the cost of the new fob.

Getting a fob is easy enough, but finding the right place to have it done isn't easy. If you have a relatively new vehicle and you want the peace of mind that comes with knowing that your keys fobs are in good condition, you might be better off going to the dealership for this service. However, if you're looking for a more affordable option, it is often possible to find an independent locksmith who can offer the same services for a significantly lower price.

A locksmith professional is a great choice if you're not comfortable doing this kind of work. They are certified and equipped to replace or reprogram most types of car key fobs, and they can often complete the task quickly. A locksmith is also able to visit your house or office, which is convenient for a lot of people. They can even cut and program keys on-site in case you've lost keys, which is great for those who do not want to leave their vehicles unattended.