20 Things You Should Know About Car Key Fob Repair Car Key Fob Repairs

Key fobs today can do more than unlock and start cars. This added complexity can cause costly repair costs in the event that it malfunctions.

The good news is that the majority of fobs use flat watch-style batteries that are easy to replace at home. You may even find that a reset can bring it back to life.

Battery Replacement

The most frequent reason why the key fob ceases to function is because of a dead battery. It's easy to fix and worth trying before you purchase a replacement fob. You can pick up the new button cell at your local auto parts store or hardware retailer If you own one. 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 inside your fob.

The majority of fobs have two halves that snap together- you'll need to gently pull the sides apart in order to access the battery. You'll need a small flat-bladed screwdriver or another tool with a blade that is thin. It may be helpful to look for a groove along the lower edge of the fob that you can place your tool between. You might also want to be on the lookout for small pieces that may fall off while working.

Once you have your new battery, you can insert it the same way that you removed the old one. Make sure that the positive (+) side is facing up towards the buttons, and that the negative (-) side of the battery is aligned with the markings inside the battery compartment of your fob.

Test the fob to see whether it functions by pressing the button. If it fails, it may be a problem with your vehicle that requires to be repaired or replaced by a professional.

Certain key fobs can be difficult to open, and the contacts may be fragile and easily corroded. In these instances the best solution is to speak with a expert or a dealer. When replacing a battery be gentle and follow the owner's instructions. You might be able to locate a comparable battery at a discounter or big-box retailer however, you'll need to consult your owner's manual to make sure that it's compatible with your vehicle.

Replace the internal key

To guard against theft, many key fobs have a mechanical key hidden inside. When the battery in the fob fails and the key is discarded, a blank one is left behind, which can be used to unlock trunks and doors. In some instances it is possible to start certain vehicles. Most people don't know this, but they can save themselves a trip to the dealership by simply replacing the fob's battery. The flat watch-style batteries are used in most modern fobs. They can be located at hardware and auto parts stores. It is important to use the right type of battery. A bad battery can cause damage to the circuitry, causing the fob to fail much earlier.

If you change the battery, and the issue persists, it could be an indication that something else is happening with your vehicle. If you have an owner's guide look for a reset procedure is available to restore the fob's factory programming. If this fails, you'll need to visit a dealership or independent shop that specializes security systems for vehicles and key fob programming.


Fobs could also fail because of faulty transmitter receivers. They are usually found close to the steering wheel or on the dashboard. They transmit signals that enable you to unlock your car and begin it using the fob. If you notice that you're required to move closer and closer to your car to be able to make it work, there's a great chance the transmitter is failing.

A professional might have to open the fob's case to replace the transmitter. A simple screwdriver will usually accomplish the task however some fobs come with complicated release mechanisms that require a specialized tool or equipment that is available only through a dealer. It is a good idea to have a qualified mechanic do this job so that you don't break the fob or cause injury to yourself.

Reprogramming the Key

A key fob that's not working could just require an upgrade in battery. Because they are cheap and readily available at pharmacies and home improvement stores, it's a good first step before investing in a new car key fob.

You can also re-program your key fob by yourself If you follow some basic steps. The procedure may differ for different vehicles, so it is recommended to read the owner's manual and study the specific model of your vehicle. One key fob might require that the ignition be on when programming. One key fob could require the key to be inserted multiple times.

The general process is simple. First, make sure that the new battery is firmly in place. Then, sit in the driver's seat and shut all doors EXCEPT for the driver's side door. This will ensure that the new fob is communicating with the vehicle correctly. After that, put the old key back in the ignition and turn it to the ON position, but do not start the engine. Then press the lock button on the fob, while making sure to point it towards the transmission receiver, which is usually situated on the front of the car above the mirror. Within a short time frame the key will announce to the vehicle that it's been programmed by triggering the doors locks or emitting the sound of a chime. This is a challenging process, so pay attention to the timing and don't press too hard the button.

If the key fob doesn't work after reprogramming it, try using new batteries. If the issue isn't resolved you should visit your car dealer or locksmiths should be considered. A professional will have all the tools and equipment needed to reprogram your car's fob or design a new one if needed.

Genesky says he's able to program newer fobs for around $200-$250, based on the model of vehicle. However, electronic car key repair had the need to refuse customers with European models because he doesn't have the expensive equipment required. Fortunately, most aftermarket fobs are programmable, but it's always best to talk to an auto dealer first to find out what their price is.

Getting a New Fob

If the key fob you have cannot be repaired, you might require another one. Depending on the brand and model, the dealership or an auto locksmith might be able to help. The dealership is likely to be the most expensive option for a replacement fob but it also has the tools and software needed to program your car correctly. For a more affordable solution, a variety of locksmiths can offer you new car keys for a more affordable cost.

Before you rush to get a new key fob, it is an excellent idea to try resetting your current device. Your owner's manual should outline the proper reset procedure that is typically the pushing of a button which restores the original programming.

It is also a good idea to read the owner's manual and warranty information before you decide the best place to get an replacement fob for your key. If your car is under warranty, or you have a car-insurance policy or auto club membership that includes bumper-to-bumper coverage, you may be eligible to receive a reimbursement for the cost of a new fob.

Finding a fob is simple enough however, finding the right location to get it done can be tricky. If you own a new car and would like the assurance from knowing that your key fobs are in working condition, you might prefer going to the dealership for this service. If you're looking for a cheaper alternative, it is possible to find a locksmith that will provide the same service at a lower price.

If you're not comfortable doing this type of work yourself, a professional locksmith may be a good option. They are trained and equipped to replace or reprogram keys for cars of all kinds, and can do so quickly. Locksmiths can also come to your office or home which is convenient for many. They can cut keys and program them on site if you've lost them. This is ideal for those who don't like to leave their car without a key.