Car Key Fob Repairs

Key fobs today can do more than unlock and start cars. However, the added complexity could add up to costly repairs when one of them fails.

It's good to know that most fobs are powered by flat watch-style batteries which can be replaced at home. You might find that a simple reset can make your fob work again.

Battery Replacement

The most frequent reason why that a key fob doesn't work is due to an inoperative battery. This is a simple fix, and it's worth a try before you decide to spend money on a new key fob. Simply drive your car to an hardware or auto parts retailer that sells button cells and choose a replacement. You can also consult 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 inside your fob.

You'll need to gently pry apart the sides of most fobs to access the battery. You'll usually need a small screwdriver or some other tool that has a flat, thin blade. You can wedge your tool into a notch at the bottom of the key fob. You might also want to watch out for small pieces that might break loose as you work.

Once you have the new battery, insert it in the same manner that you removed the old one. The positive (+) side should face the buttons and the reverse (-), the markings on the battery compartment.

Press a button to test the fob. If it doesn't work, there could be a problem in your vehicle that requires to be repaired or replaced by a professional.

Certain 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 expert or dealer. If you're looking to replace the battery, make sure to be gentle and follow the instructions specifically in your owner's manual. You might be able to locate a comparable battery at a discounter or big-box retailer, but you'll need to consult your owner's manual to ensure that it's the right one for your vehicle.

Replace the internal key

To guard against theft, many key fobs come with an electronic key inside. If the battery inside a fob dies, a blank key is left behind that can be used to open trunks and doors. In some instances the key could even start certain vehicles. Most people don't realize they can avoid a trip to the dealership by replacing the fob's batteries. The flat watch-style battery is used in most modern fobs. They can be found at hardware and auto parts stores. It is important to use the right type of battery. A bad battery can cause damage to the circuitry, causing the fob's failure earlier.

If you change the battery, and the issue is still there it could be a sign that something else is wrong in your vehicle. If you have an owner's guide look for there is a reset option available to restore the fob's original programming. If this 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 may also fail due to malfunctioning transmitter receivers. They are typically located on the dashboard or next to the steering wheel, and they send signals that allow you to unlock and start your car using the fob. If you notice that you're being required to get closer and closer to your vehicle to get it to work, there's a great possibility that the transmitter is not working.

A professional might need to open the fob's case to replace the transmitter. A simple screwdriver is enough to do the job, but some fobs have complex release mechanisms that require a specialized tool or equipment that is available only through a dealer. It's best to have a qualified mechanic handle this job to ensure you don't break the fob or hurt yourself.

Reprogramming the Key

A key fob that is not working could just require a new battery. These batteries are readily available in pharmacy and home improvement stores and are cheap. This is a good option to begin before purchasing an entirely new key fob.

Alternately, you might be able to re-program the fob yourself by following the steps. The process is different for different vehicles makes, so it's important to read the owner's manual and study the specifics of your particular model. One key fob might require that the ignition be on when programming. A key fob might require the key to be inserted multiple times.

The procedure is easy. First, ensure that the new battery is in place. Close all doors except the driver's door. This will ensure that the new key fob is communicating with the vehicle in a proper manner. Then, place the old key back into the ignition and switch 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 usually located on the left side, just above the mirror. Within a short time frame the key will announce to the vehicle that it's been programmed by cycling the doors' locks or generating the sound of a chime. This is a challenging procedure, so pay attention to timing and don't over-press the button.

If the key fob doesn't work after reprogramming it, try using new batteries. If the problem persists you should visit your dealer for your car or locksmiths should be considered. A professional will have all the tools and equipment to reprogram your car fob or create a new one if necessary.

Genesky says he can usually program newer fobs at around $200-$250, depending on the model of vehicle. Genesky has had European models rejected because they don't have the equipment required. Most aftermarket fobs can be programmed, but you should always inquire with your local car dealer to determine the price.

Getting a New Fob

If your key fob can't be repaired, you may have to purchase an entirely new one. Depending on the make and model, the dealership or an auto locksmith might be able to help. The dealership will likely be the most expensive option for a repair car key fob replacement fob however, they'll have the necessary tools and software to program your vehicle correctly. For a more affordable solution, many independent locksmiths can offer you a brand-new car key fob for a more affordable cost.

It's a good idea to attempt to reset the fob you have before you decide to buy another one. The owner's manual should outline the correct reset procedure. This is usually the result of a series of button presses which restores the factory settings.

It is also recommended to check your owner's guide and warranty information to see if you can get a replacement key fob. If your vehicle's warranty is in good standing or you have an auto club or car insurance policy that covers bumper to bumper you could be eligible to receive a reimbursement for the cost of a replacement fob.

The process of getting a fob can be simple enough however finding the best place to have it done isn't easy. If you own a new car and want the assurance from knowing that your key fobs are in good working condition, you might be better off going to the dealership for this service. However, if you're looking for an option that is more affordable it is possible to find a locksmith independent who can provide the same service for a significantly lower price.

A locksmith who is professional is a good option if you're not comfortable doing this kind of work. They are certified and equipped to reprogram or replace the majority of car key fobs and they can often accomplish the task in a short time. Locksmiths can also visit your house or office which is a great option for many people. They can cut keys and program them on the spot in case you've lost them. This is great for those who don't want to leave their vehicle in the garage.