Car Key Fob Repairs

Key fobs today do much more than just unlock and start vehicles. However, the added complexity could result in high repair bills when one of them fails.

It's good to know that the majority of fobs are powered by flat-watch-style batteries which can be easily replaced at home. And you may find that a reset will bring it back to life.

Battery Replacement

A dead battery is the most common cause of the fob's key not working. This is a simple repair, and is worth a try before you decide to spend money on a new key fob. Simply drive your car to an hardware or auto parts retailer that sells button cell batteries and purchase the replacement. You can also check your owner's manual (or, if you don't have one, YouTube is full of videos from people explaining how to do it) for specific instructions for opening and replacing the battery on the particular type of fob.

You'll have to gently pull away the sides of the majority of fobs to access the battery. It's usually a screwdriver or a different tool equipped with a thin, flat blade. It might help to look for a notch along the bottom of the fob which you can place your tool between. You might also want to be on the lookout for small pieces that may come loose while you work.

When you have your new battery, place it in the same way that 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 marks inside the battery compartment of your fob.

Test the fob to see if it works by pushing a button. If it doesn't work, you may have a problem with your car that requires a professional to repair or replace.

Some key fobs require special tools to open and close them, and the contacts inside could be fragile and susceptible to corroding. In these situations the best solution is to talk to a specialist or a dealer. If you're in need of replacing batteries, you should be very gentle and follow the specific instructions in your owner's manual. You may be able to find a similar battery at a discounter store or a big-box retailer however, you'll need to check the owner's manual to be sure that it's compatible with 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 blank which can open trunks and doors (and in some cases start certain vehicles). Many people don't realize this however they could save a trip to the dealership by simply replacing the fob battery. Most modern fobs have flat-watch-style batteries which are easy to find at auto parts stores and hardware shops. It is important to use the correct kind of battery. The wrong type can damage the circuitry and lead to the fob to fail much earlier.

If the problem persists after you replace the battery, it may be an indication that something else is wrong in your vehicle. Go through the owner's manual to see if there's a reset procedure that will bring the fob back to factory programming. If this fails, you'll need go to a dealer or an independent shop that specializes in security systems for vehicles and key fob programming.

Fobs can also fail due to faulty transmitter receivers. These are usually located close to the steering wheel or on the dashboard. They transmit signals to enable you to unlock your car and start it with the fob. You may have to move 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 can usually do the job however some fobs come with complex release mechanisms that require a special tool or equipment that is available only at a dealership. This task must be handled by a certified mechanic to avoid damaging the fob and yourself.

Reprogramming the Key

A key fob that is not functioning simply requires a new battery. These batteries are easily found in both pharmacy and home improvement stores and are affordable. This is a good way to start before buying the new key fob.

Alternately, you might be able to program the fob by following some basic steps. This process varies between vehicle makes, so it's important to refer to the owner's manual and study the specifics of your particular model. For instance one key fob could require the ignition to be on while reprogramming it. One key fob could require the key to be inserted several times.

The basic procedure is simple. Make sure the battery is securely in place. Close all doors except the driver's door. This will ensure the new fob is communicating with the vehicle correctly. After that, put the old key back into the ignition and turn it to the ON position, but don't start the engine. Press the lock button while aiming the fob at the transmission receiver. This is usually located on the front, above the mirror. The key will notify the vehicle within a short period of time that it is being programmed. This can be done by turning the door locks, or emitting an audible chime. This process can be tricky, so it's important to be aware of the timing and don't over-press the key button.

If the key fob does not work after reprogramming, try replacing the batteries. If the problem persists you might want to visit your local dealer or locksmith. A professional locksmith will have the tools and equipment needed to reprogram your car fob, or even create a brand new one if needed.

Genesky says he can usually program newer fobs for around $200-$250, based on the car. But he's had to refuse customers with European models due to the fact that there's no equipment required. The majority of aftermarket fobs can be programmed, but you should always consult your local dealer to find out the price.

Getting a New Fob

If your key fob is simply beyond repair car key, you may need to purchase an alternative. Depending on the brand and model, the dealer or an auto locksmith may be able to assist. 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. Many independent locksmiths offer a brand new car key fob at the lower cost.

It's a good idea to attempt to reset the fob you have before you decide to buy a new one. The owner's guide should explain the correct procedure for reset. It is typically an orderly press which restores the factory settings.

It's also a good idea to review the owner's manual and warranty information prior to deciding which place to go for a key fob replacement. If your car is still under warranty, or you have a car insurance policy or auto club membership that includes bumper-to-bumper coverage, you may be able to receive some reimbursement for the cost of an entirely new fob.

The process of getting a fob can be simple enough, but finding the right location to get it done isn't easy. If you have a relatively new car and want the peace of mind that comes with knowing that your key fobs are in working condition, you might prefer going to the dealership for this service. If you are seeking a less expensive alternative, it is possible to find a locksmith who can provide the same service for less cost.

If you're not comfortable doing this kind of work yourself, a professional locksmith can be a great option. They are trained and equipped to repair or replace the majority of car key fobs, and often, they can complete the task quickly. A locksmith is also able to visit your house or office which is a great option for many people. They can cut and program keys on the spot if you've lost them. This is ideal for those who do not want to leave their car in the garage.