How to Repair a Car Key Fob

You key fob is likely to be tossed around a lot. This can cause the buttons to become stuck or break. Try giving it a thorough check and swapping out the battery if you need to.

Most cars are equipped with the coin-style battery, which you can buy from pharmacies and big box stores, as well as home improvement retailers. Some models require programming equipment that is available only to dealers.

Dead Battery

The car key fob is a tiny and handy little device that makes getting into your vehicle and launching it much easier than ever. What happens if you push the button a few times and your car doesn't respond? The most common cause for this is the battery is dead. The battery can be replaced easily. You can get replacements in supermarkets and auto parts stores, as well as some home improvement stores.

However, some of the other features that the key fob has may not function. This could be due to an issue with the mechanism or an electrical issue, or even a deprogramming mistake within the car's receiver. In these cases it's best to consult an expert.

Fortunately, a majority of manufacturers include a key slot made of mechanical inside the fob to be used in case of a dead battery. In the majority of cases the key slot is hidden behind a cover on the handle of the fob. You can insert the actual key into the slot to open your doors and start your vehicle. Just don't forget to re-insert the key fob once you start your car!

If you have a Ford equipped with SYNC Connect you can also start the car with the key fob. The majority of SYNC Connect equipped Ford vehicles have an additional "E-blade" within the cupholder. This is a mechanical key that can be used to press the starter button should your key fob fails to start the car. For the best use of this feature, make sure the battery is charged. You can also refer to your owner's manual for instructions on how to use it.

If your car continues to have problems after changing the battery on your key fob, you might need to call a locksmith or your dealer to have the battery or fob repaired. In some cases, the key fob can be programmed to your car with a new battery at the dealership or at certain Interstate All Battery Center locations. But this will only work if the circuit board and antennas aren't damaged.

Damaged Buttons

In the course of its existence your car key fob's buttons are bound to undergo a lot wear and wear and tear. They are susceptible to being dropped and are frequently in pockets and purses. The jolting could cause the internal components to loosen or become damaged, leading to them not responding when you press them. Simple steps can usually resolve this issue, however sometimes you may require taking your fob to an expert locksmith.

Aside from a dead battery, the most common reason why a key fob for a car won't work is that it requires new batteries. These small, coin-shaped batteries are sold at a majority of hardware stores as well as large-box retailers. They aren't expensive. You can also find videos explaining how to replace the battery in your key fob on YouTube or in the owner's manual.

It's important to note that some keyfobs require specific steps to enter the appropriate programming mode to change the batteries. In these instances you'll need consult the owner's guide and/or an auto locksmith to make sure that you're following the proper procedure.

If the battery is dead, leaving your key fob in extreme temperatures could cause it to cease functioning. In this instance, you'll need to consult an automotive locksmith or your dealer for the replacement fob.

If the buttons on your key fob remain unresponsive it could be because the contacts inside are worn out. These contacts are rubber-like and coated with an electricity-conducting film, but they can start to wear out over time due to repeated use. You can fix this problem by dismantling the key fob, and then placing an aluminum strip over the contacts that are worn out.

It's important to remember that some key fobs can be difficult to open and can't be opened with confidence without the right equipment that is only accessible at a dealer. If you try to open it using the use of a screwdriver or other tool, you may end with damage to the circuit board. This could result in a much more expensive repair cost.

Circuit Board Issues


If your key fob is still in a position to unlock the doors of your car and even start your engine but it's not as far as it did previously, the problem may be with the circuit board. The circuit board is a small electronic chip in the case that sends signals to your car, telling it to close your doors, lock the trunk, and even switch off your ignition. If the circuit board has been damaged, your keyfob isn't able to transmit these signals.

You can repair a damaged circuit board on your own with a little technical knowledge. Start by removing the battery and taking the holder and rubber button assembly from the circuit board. Clean the contacts and plastic frame using rubbing alcohol and a cotton swab. This should eliminate any corrosion that blocks the circuit board from transmitting signals.

Once you've reassembled the key fob, make sure it's in programming mode. Usually this involves switching it off and on several times, so check your owner's manual to find specific instructions. Many vehicle manufacturers have online videos that explain how to accomplish this. If key repair car 're not sure how to complete the task then you can take your key fob into the locksmith that specializes in the model of your car.

Some modern key fobs have an integrated receiver that lets you to unlock your trunk and open the doors, and also turn on your ignition and start the engine from a distance. They are generally more reliable and can work over a greater range. If your key fob that is newer isn't working as well as it did in the past it could be due to an antenna that is not working properly or other issue within the internals.

If you're having trouble getting your key fob to work, the most likely culprit is a dead battery. It's inexpensive and easy to replace. However, if the fob's buttons or circuit board has been damaged, you'll need have it professionally repaired and changed to a new program. This service is provided by most dealerships, but you can find a shop that specializes in your particular brand.

Forgotten Key

It's an absolute nightmare if you lose your car keys. You can turn the house upside down by retracing all your steps and looking everywhere. This includes in drawers, bags and under couches. You'll eventually find it. It is best to take preventative measures as a method to avoid losing your key fob. If you are prone to forgetfulness or have a touch of ADD Make several copies and distribute them to family and friends so that you won't be in a state of panic and worry for four hours if you lose your key fob.

A lot of cars come with key fobs that let you to lock and unlock doors, and in some instances, activate the alarm system or open the trunk. But a few of the more advanced models come with even more exciting features, like the ability to call your car at the press of a button. This feature isn't included in all models, but if you have one of the cars that can do it (Genesis GV60 and Hyundai Sonata are two examples), this is an awesome feature to have.

The good news is that if you have a spare key fob that's programmed to your vehicle, then you can use it to start your car in the event that you lose your original. You can also ask an automotive locksmith to design a key fob that is specifically programmed for your vehicle. But before you do consult with your dealer to determine if they are able to offer an alternative key fob at a cheaper cost.

If you don't have an extra key the only method to start your car is to call an auto locksmith to come out and cut a new one or replace the current key fob with a blank. Dealers can also help with this however you'll need to bring your vehicle in along with proof of ownership papers. But the good news is that these services are fairly inexpensive, especially compared to getting a new replacement key from your dealer that could cost anywhere from $200 to $250.