The 10 Scariest Things About Car Key Fob Repair

· 5 min read
The 10 Scariest Things About Car Key Fob Repair

Car Key Fob Repairs

Key fobs of today are more than just a way to unlock and start vehicles. But that extra complexity can result in costly repairs in the event that one of them malfunctions.

It's important to know that the majority of fobs are powered by flat-watch-style batteries which can be replaced at home. You may even find that a reset will get yours working again.

Battery Replacement


A dead battery is the main reason for a key fob that isn't working. It's a simple fix, and it's worth trying before you spend money on a new key fob. Take your car to an auto parts store or a hardware retailer that carries button cell batteries and purchase an alternative. You can also consult your owner's guide (or YouTube for videos explaining how to replace the battery) for 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 require a small flat-bladed screwdriver, or another tool with a thin blade. It might help to look for a notch along the bottom of the fob which you can wedge your tool between. You may also want to keep an eye out for tiny pieces that could break loose as you work.

Install the new battery in the same way you removed the old one. Make sure the positive (+) side is facing up toward the buttons and that the negative (-) side of the battery is aligned correctly with the markings in the battery compartment of your fob.

You can push a button to test the fob. If it doesn't work, you may have an issue with your vehicle that requires a professional to repair or replace.

Some key fobs are difficult to open, and the contacts may be brittle and easily damaged. In these situations the best solution is to talk to a expert or dealer. When replacing a battery be gentle and follow your owner's manual. You might be able to find a similar battery at a discounter store or a big-box retailer, but you'll need to refer to your owner's manual to be sure that it's the right one for your vehicle.

Replacing the Internal Key

To protect against theft, the majority of key fobs come with a mechanical key hidden inside. When the fob battery dies it leaves an internal key that is blank that is able to unlock trunks and doors (and in some cases, even start certain cars). Many people don't realize this however they could avoid from a trip to the dealer by simply replacing the fob battery. The flat watch-style battery is used in the majority of modern fobs. These batteries are easily found at hardware stores and auto parts stores. It is important to use the correct kind of battery. The wrong kind can damage the electronic circuitry, which can cause the fob to fail faster.

If you change the battery and discover that the issue is still there, it could be a sign that something else is happening with your car. If you have an owner's guide, check to see if a reset procedure is available to restore the fob's original programming. If that doesn't help then you'll need to visit a dealer or an independent shop that specializes in vehicle security systems and fob programming.

Fobs can also fail due to faulty transmitter receivers. These are usually built into 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 your car to get it to work.

A professional might have to open the fob's case to replace the transmitter. A simple screwdriver can usually do the trick, but some fobs require a specialized tool or special equipment that can only be found at a dealer. It's a good idea to have a qualified mechanic handle this job to ensure you don't accidentally break the fob or cause injury to yourself.

Reprogramming the Key

Often a non-functional key fob simply requires a new battery. Because these batteries are cheap and easily available at pharmacies and home improvement stores, this is the ideal first step before purchasing a new car key fob.

You may also be able to re-program the fob by following a few basic steps. This process can vary between automobiles, so read the owner's manual and research the model you have. For example one key fob could require that the ignition be turned on while reprogramming it. A key fob might require the key to be inserted several times.

The process is straightforward. Make sure the battery is securely in place. Close all doors, except the driver's door. This will ensure that the new fob is communicating with the vehicle correctly. Then, put the old key back in the ignition and switch it to the ON position, but don't start the engine. Press the lock button while aiming the fob toward the transmission receiver. This is typically located on the front above the mirror. The key will notify the vehicle within a short period of time that it's being programmed. This can be accomplished by cycling the door locks, or emitting an audible chime. This can be a tricky process, so pay attention to timing and don't over-press the button.

If  G28 Car Keys  isn't working try reprogramming it with new batteries. If the issue isn't resolved, a visit to your car dealer or locksmiths should be considered. A professional will have all the tools and equipment required to reprogram the car fob, or even create a brand new one if needed.

Genesky claims he is able to program newer fobs that range between $200 and $250, depending on the model of vehicle. But he's had to refuse customers with European models due to the fact that there's no equipment they require. Most aftermarket fobs can be programmed, but you should always check with your local car dealer to find out the cost.

A New Fob

If your key fob is beyond repair, you may need to get an entirely new one. Based on the make and model, an auto locksmith or dealership may be able to help. The dealership is likely to be the most expensive choice for a replacement fob, however, it will also have the tools and software necessary to program your car correctly. For a more affordable solution, a variety of locksmiths can provide you with new car keys at a lower price.

Before you rush to get a new fob, it is an excellent idea to try resetting your current device. The owner's manual should explain the correct procedure for reset, which is usually just pushing a few buttons that reset the original programming.

You should also look over the owner's guide and warranty information to see whether you are eligible for a replacement fob for your key. If your car's warranty is still active or you have an auto club or car insurance policy that covers bumper to bumper, you may qualify to receive a reimbursement for the cost of a replacement fob.

Finding the best location to purchase a fob can be difficult. It is possible to go to the dealer for this service if you have a newer vehicle and you are looking to feel secure knowing that your keyfobs are working correctly. If you are looking for a more affordable alternative, it's possible to find a locksmith who can provide the same service at a lower price.

A locksmith who is professional is a good option for those who aren't comfortable with this kind of work. They are skilled and equipped to reprogram or replace all kinds of car key fobs and they can often accomplish the task in a short time. Locksmiths can also come to your office or home which is convenient for many. They can even cut and program keys on-site when you've lost keys, which is great for those who do not want to leave their cars in the dark.