5 Laws Everyone Working In Car Key Fob Repair Should Know

· 5 min read
5 Laws Everyone Working In Car Key Fob Repair Should Know

Car Key Fob Repairs

Key fobs today can do much more than just unlock and start vehicles. This extra complexity can result in costly repairs if it breaks.

The good news is that the majority of fobs use flat watch-style batteries that are easy to replace at home. You might find that a simple reset will allow your fob to function again.

Battery Replacement

A dead battery is the most common reason for a key fob not working. It's a simple fix and worth trying before you spend money on a replacement fob. Take your car to a local hardware or auto parts retailer that stocks button cell batteries and purchase a replacement. You can also consult your owner's guide (or YouTube for videos explaining how to replace the battery) for specific instructions on how to replace and open the battery in your fob.

You'll need to gently pull off the sides of many fobs to access the battery. You'll require a small flat-bladed screwdriver, or another tool with a thin blade. You can put your tool into a notch on the bottom of the key fob. You might also want to watch out for tiny pieces that might break loose as you work.

Install the new battery in the same manner as you removed the previous 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 professional.

Some key fobs are difficult to open and their contacts may be fragile and easily damaged. In these cases an expert in the field or a dealer could be the best option. When replacing a battery be patient and follow your owner's instructions. You may be able to locate an identical battery in a big-box store or discounter, however, make sure you read your owner's guide to ensure it's compatible with your vehicle.

Replacing the Internal Key

Most key fobs contain a physical mechanical key however, it's hidden within the fob to stop thieves from getting. When the battery in the fob fails it will leave a blank key left behind, which can be used to unlock doors and trunks. In some instances it is possible to start certain cars. The majority of people don't realize that they can avoid a trip to a dealership by replacing the fob's batteries. The flat watch-style battery is found in most modern fobs. These batteries can be found at hardware and auto parts stores. It is essential to choose the correct type of battery. A bad battery can cause damage to the circuitry, causing the fob's failure much sooner.

If the problem continues to persist even after you have replaced the battery, it may be an indication that there is something else wrong with your vehicle. If you have an owner's manual, check to see if there is a reset option available to restore the fob's factory programming. If this doesn't work, you'll need to go to a dealership or an independent shop that specializes in vehicle-security systems and fob programming.

Fobs can also malfunction due to malfunctioning transmitter receivers. These are usually built into the dashboard or next to the steering wheel, and they transmit signals that allow you to unlock and start your car with the fob. You may need to get closer to the car to make it work.

A professional might have to open the fob's case to replace the transmitter. A simple screwdriver will usually suffice, but certain fobs require a specific tool or special equipment that can only be found at a dealer. This task should be performed by a certified mechanic to ensure that the fob is not damaged and yourself.

Reprogramming the Key

Most of the time, a key fob that isn't working simply requires a new battery. They are easily available in pharmacy and home improvement stores and are inexpensive. This is a good way to start before buying the new key fob.


You may also be able to re-program the fob by following the steps. The process is different for different vehicles makes, so it's important to refer to the owner's manual and study the specifics of your particular model. One key fob could require the ignition to be on when changing the program. One key fob may require the key to be inserted several times.

The basic procedure is simple. First, make sure the new battery is in place. Close all doors except the driver's door. This will ensure that the new key is communicating with the vehicle correctly. Put the old key in the ignition, turn it ON but don't start the engine. Then, press the lock button on the fob, while looking at the transmission receiver, which is typically located on the front of the vehicle above the mirror. The key will signal to the vehicle within a short amount of time that it's being programmed. This can be done by turning off the door locks, or emitting an audible chime. This process can be tricky so it's essential to be aware of the timing and to not over-press the key button.

If the key fob still doesn't work, try reprogramming it again using new batteries. If the issue is still there, you might want to visit your local dealer or locksmith. A professional will have the tools and programming equipment to reprogram your car's fob, or create the key if needed.

Genesky claims he is able to program newer fobs ranging from $200 and $250, depending on the vehicle. He's had European models rejected due to the fact that they don't have the equipment required. Luckily, the majority of aftermarket fobs can be programmed, but it's always best to talk to a car dealer first to find out what the cost is.

How do I get a brand new fob

If your key fob can't be repaired, you may have to purchase a new one. Depending on the make and model, the dealership or an auto locksmith may be able to help.  car keys repair  will likely be the most expensive option for a replacement fob, but they will also have all the required tools and software needed to program your car correctly. If you're looking for a cheaper solution, a variety of locksmiths can provide you with new car keys for a much more reasonable cost.

Before you rush to get an entirely new device, it is recommended to consider resetting your current one. The owner's manual should explain the proper procedure for reset that is typically the pushing of a button that reset it to factory programming.

It is also recommended to check the owner's guide and warranty information to see whether you can obtain an additional fob for your key. If your car's warranty is in good standing or you have an auto club or car insurance policy that covers bumper to bumper, you may qualify for a reimbursement on the cost of a replacement fob.

Finding a fob is simple enough, but finding the right location to get it done isn't easy. If you own a new vehicle and you want the assurance from knowing that your key fobs are in good working condition, you might prefer 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 lower cost.

If you're not comfortable doing this kind of work yourself, a professional locksmith can be a good option. They are trained and equipped to replace or reprogram the majority of car key fobs and often, they can do it quickly. Locksmiths can also come to your house or office which is a great option for many. They can even cut and program keys on the spot if you have lost them, which is ideal for those who don't like to leave their cars unattended.