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A Provocative Rant About Car Key Fob Repair
Car Key Fob Repairs

Key fobs today are more than just a way to unlock and start vehicles. However, that added complexity can cause expensive repair costs in the event that one of them malfunctions.

It's a good idea to know that most fobs are powered by flat watch-style batteries which can be easily replaced at home. And you may find that a reset will make your device work again.

Battery Replacement

The most common reason the key fob ceases to function is because of the battery being dead. This is easy to fix, and it's worth a try before you spend money on a new fob. Simply take your car to an auto parts store or hardware retailer that carries button cell batteries and purchase the replacement. You can also refer to your owner's guide (or YouTube for videos explaining how to replace the battery) to find specific instructions on how to open and replace the battery inside your fob.


You'll need to gently pull off the sides of many fobs to access the battery. You'll need a small flat-bladed screwdriver, or a different tool with a small blade. You can insert your tool into a notch at the bottom of the key fob. You might also want to look out for tiny pieces that may come loose as you work.

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

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

Certain key fobs require specific tools to open and close, and the connections inside can be fragile and susceptible to corroding. In these situations you should consult a specialist in your car or the dealer will likely be the best option. When replacing a battery, be gentle and follow your owner's manual. You may be able to locate an identical battery at a big-box retailer or discounter, but be sure to check your owner's guide to ensure that it's compatible with your vehicle.

Replacing the Internal Key

Most key fobs include a physical mechanical key that is hidden within the fob to prevent thieves. When the battery in the fob goes out it will leave a blank key left behind that can be used to unlock trunks and doors. In some cases it is possible to start certain vehicles. Many people don't realize this however they could save from a trip to the dealer by simply replacing the fob battery. The flat watch-style battery is used in most modern fobs. They can be found at hardware and auto parts stores. Using the correct type of battery is crucial, however. A wrong type of battery can harm the electronic circuitry and cause the fob to fail much faster.

If you try replacing the battery and discover that the issue is still there it could be a sign something else is happening in your vehicle. If you have an owner's guide look for you can use a reset procedure to restore the fob's factory programming. If this doesn't work, you'll have to visit a dealership or a shop independent that specializes in vehicle-security systems and key fob programming.

Fobs could also fail due to malfunctioning transmitter receivers. They are usually found close to the steering wheel or in the dashboard. They transmit signals to enable you to unlock your vehicle and start it using the fob. If you're being required to get closer and closer to your vehicle to get it to work, there's a high possibility that the transmitter is not working.

It could be necessary for a professional to open the case of the fob to replace the transmitter. A simple screwdriver is usually enough to suffice, but certain fobs require a specific tool or special equipment that can only be found at a dealership. It's best to have a certified 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 might just need a new battery. These batteries are readily available in both pharmacy and home improvement stores and are cheap. This is a great option to begin before purchasing a new key fob.

Alternatively, you may be able to re-program the fob by following some basic steps. The procedure may differ for different automobiles, so consult your owner's guide and study the specific model of your vehicle. For example, one key fob may require the ignition to be on while reprogramming it. Another key might require the key to be removed and inserted several times.

The basic procedure is easy. First, make car key repair near me that the new battery is firmly in place. Then, sit in the driver's seat and close all doors, with the exception of the driver's side door. This will ensure that the new fob is communicating with the vehicle properly. Then, put the old key back into the ignition and turn it to the ON position, but do not start the engine. Press the lock button while aiming the fob at the transmission receiver. This is typically located on the front, above the mirror. Within a brief time, the key will indicate to the vehicle that it's been programmed by turning off the doors' locks or generating an emitted sound. This is a difficult procedure, so pay attention to timing and don't over-press the button.

If the key fob doesn't function after reprogramming, you can try replacing the batteries. If the problem persists you may want to visit your local locksmith or dealer. A professional will have all the tools and equipment to reprogram the car fob or design a new one, if required.

Genesky says he can usually program newer fobs at around $200-$250, based on the vehicle. He's had European models rejected due to the fact that he lacks the expensive equipment needed. Fortunately, most aftermarket fobs can be programmable but it's always best to talk to an auto dealer first to see the price.

Getting a New Fob

If your key fob is damaged beyond repair, you could need to purchase an entirely new one. Depending on the make and model, a dealership or an auto locksmith may be able to help. The dealership is likely to be the most expensive alternative for replacing a fob However, they'll have all the required tools and software needed to program your car correctly. For a more affordable option, a number of independent locksmiths can provide you with a brand-new car key fob for a more affordable cost.

It is a good thing to try to reset the fob you have before you make the decision to purchase a new one. Your owner's manual should outline the proper procedure for reset that is typically the pushing of a button that reset it to factory programming.

You should also check the owner's manual and warranty information to determine if you can get an additional key fob. If your vehicle is under warranty, or you have a car-insurance policy or auto club membership that provides bumper-to-bumper coverage, you may be eligible for reimbursement for the cost of a new fob.

Finding a fob is simple enough however finding the best place to have it done isn't easy. If you own a new car and want the peace of mind that comes with knowing that your key fobs are in working order, you may be better off visiting the dealership for this service. If you're looking for a more affordable alternative, it's possible to find a locksmith who will provide the same service at less cost.

If you aren't comfortable handling this kind of work yourself, a professional locksmith may be a great option. They are skilled and equipped to reprogram or replace most types of car key fobs, and often they can accomplish the task in a short time. In addition, a locksmith will often visit your workplace or home to do the job, which can be very useful for certain people. They can even cut and program keys on the spot in case you've lost keys, which is great for those who do not want to leave their cars in the dark.

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