Car Key Fob Repairs

Today's key fobs do a lot more than unlock and start cars. However, that added complexity can result in high repair bills if one of them breaks.

It's important to know that a majority of fobs are powered by flat watch-style batteries, that can be replaced at home. You might find that a simple reset can allow your fob to function again.

Battery Replacement

A dead battery is the most common cause of a key fob not working. It's a simple solve and is worth a try before you invest in an alternative fob. You can pick up an additional button cell battery at a local auto part retailer or hardware store in the event that you already have one. You can also consult your owner's guide (or YouTube for videos explaining how to replace the battery) to find specific instructions on how to replace and open the battery inside your fob.

The majority of fobs have two halves that snap together -- you'll need to gently break the sides in order to access the battery. You'll typically need a small screwdriver or another tool that has a flat, thin blade. You can put your tool into a notch on the bottom of the key fob. You may also want to be on the lookout for small pieces that may come loose while you work.

Insert electronic key repair near me in the same manner as you removed the old one. Make sure the positive (+) side is facing upwards towards the buttons, and that the negative (-) side of the battery is aligned correctly with the markings in the battery compartment of your fob.

Test the fob to see if it works by pushing a button. If it doesn't work, you may have a problem with your car that requires a professional to repair or replace.

Certain key fobs can be difficult to open, and the contacts could be fragile and easily corrosion-prone. In these cases the best choice is to speak with a specialist or dealer. If you need to replace batteries, you should be very gentle and adhere to the specific instructions in your owner's manual. You may be able find an identical battery at a big-box retailer or discounter, but be sure to check your owner's guide to ensure it is compatible with your vehicle.

Replacing the Internal Key

To guard against theft, many key fobs come with a mechanical key hidden inside. If the battery inside a fob dies and the key is discarded, a blank one is left behind and can be used to unlock doors and trunks. In some instances the key could even start certain cars. A majority of people don't realize that they can avoid a trip to a dealership by recharging the fob batteries. The flat watch-style battery is found in most modern fobs. These batteries are easily found at auto parts stores and hardware stores. The right kind of battery is crucial, however. A wrong type of battery can harm the electronic circuitry, which can cause the fob to fail much sooner.

If you replace the battery and discover that the problem persists it could be an indication that something else is wrong in your vehicle. If you have an owner's manual, check to see if you can use a reset procedure to restore the fob's factory programming. If this doesn't work, you'll have visit a dealership or an independent shop that specializes in vehicle-security systems and key fob programming.

Fobs can also fail because of faulty transmitter receivers. These are usually built into the dashboard or close to the steering wheel, and they send signals that allow you to open and start your car with the fob. If you notice that you're having to get closer and closer to your vehicle to be able to make it work, there's a great chance that the transmitter isn't working.

It could be required for a professional to open the case of the fob to replace the transmitter. A simple screwdriver will usually suffice, but some fobs require a specialized tool or special equipment that can only be purchased at a dealership. It is a good idea to have a qualified mechanic do this job so that you don't damage the fob or hurt yourself.

Reprogramming the Key

A key fob that's not working might just need an upgrade in battery. These batteries are readily available in both pharmacy and home improvement stores and are affordable. This is a great option to begin before purchasing the new key fob.

Alternately, you might be able to program the fob by following a few basic steps. This process can vary between vehicles, so it is recommended to read the owner's manual and study the specific model of your vehicle. For instance one key fob could require the ignition to be turned on while reprogramming it. Another might need the key to be removed and inserted several times.

The general process is simple. Make sure the battery is securely in place. Close all doors, except the driver's door. This will ensure the new fob is communicating with the vehicle properly. Then, put the old key back in the ignition and turn it to the ON position, but do not start the engine. Press the lock button while aiming the fob toward the receiver of the transmission. It is usually located on the left side, just above the mirror. The key will inform the vehicle within a short period of time that it is being programmed. This can be accomplished by turning off the door locks or emitting an audible chime. This can be a tricky process, so pay attention to the timing and don't press too hard the button.

If the key fob won't work after reprogramming it, try replacing the batteries. If the problem persists you may want to visit your local dealer or locksmith. A professional will have the tools and equipment necessary to re-program your car's fob or make the key if needed.

Genesky says he can usually program newer fobs for $200-$250, based on the vehicle. Genesky has had European models turned away because there isn't the equipment required. Fortunately, most aftermarket fobs are programmable however it's best to check with an auto dealer first to see what their price is.

A New Fob

If the key fob you have cannot be fixed, you could require another one. Depending on your vehicle's make and model, an auto locksmith or dealership may be able to help. The dealership is likely to be the most expensive option for a replacement fob, however, it will also have the tools and software needed to program your car correctly. Many independent locksmiths offer a brand new car key fob at the lower cost.

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


It's an excellent idea to review the owner's manual and warranty information before deciding which place to go for the replacement of your key fob. If your car's warranty still active or you have an auto club or insurance policy that covers bumper to bumper, you may qualify to receive a reimbursement for the cost of a replacement fob.

Finding a fob is simple enough, but finding the right location to do it can be a challenge. If you have a relatively new car and would like the security with knowing that your keys fobs are in working order, you may prefer going to the dealership to get this service. However, if you want 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 good option if you're not comfortable doing this kind of work. They're trained and equipped to change or reprogram car key fobs of all types and can do it quickly. Additionally, locksmiths can often come to your office or home to complete the task which can be extremely practical for some. They can cut and program keys on the spot in case you've lost keys. This is perfect for those who don't want to leave their car in the garage.