Key Fob Replacement and Repair

Modern car key fobs are used frequently and are often misused. Often an easy repair or replacement is all it takes to make them work again.

The majority of fobs are powered by a flat watch-style batteries. This can be found in auto parts and hardware stores. Before calling in a professional, do some of the DIY fixes.

Dead Key Fob Batteries

The battery in the key fob powers the remote feature in your car. It also, in conjunction with push-to-start vehicles, allows it to start your engine. This is why it is essential to keep an efficient, functioning battery. When you're out and about and your key fob is not working, it can be a huge problem. The good news is that a simple, affordable replacement can fix it quickly.

The most common sign that a battery on a key fob is dying is the loss of signal strength and range. It is also possible to notice that the buttons on the key fob aren't working or require additional effort.

It is common to find an updated key fob battery in the auto parts section of a large box retailer or online. They are typically CR2032 or CR2025 batteries that are sold in packs of two or more. However it's best to check your owner's manual before shopping for the correct battery for your fob. central locking key repair require a specific size or kind of battery that's not always in stock at big-box stores Be sure to know the specifications prior to you purchase.

Typically the battery is situated in the back of your key fob. It is removed by tearing open the case with a flat-blade screwdriver. The battery will appear like an ordinary coin and be labeled according to its size. Be sure to note the orientation of the plus and minus signs to ensure that you place the new battery properly. After the battery has been replaced, gently snap the two pieces of the fob back together and test the buttons.

It's worth noting that, in the event that your key fob continues to not function even after a battery replacement, it might be deprogrammed. In this instance, you'll need to contact an expert locksmith, which will cost some more than replacing the key fob battery.

If your fob's battery is dying or you're having other issues with your key fob, an experienced mechanic like one from YourMechanic can check and repair it to get you back on the road. Schedule an appointment to see the range of services we provide in your local area.

Weak Signals

If you notice that your key fob isn't responding as you would expect to the buttons on the remote, it could be an indication of a problem with signaling. Your car and key fob rely on radio signals to communicate, therefore weak or inconsistent signals could cause poor performance and range.

One of the first things you should examine is whether your fob's battery is low because this could significantly affect the sensitivity of the signal. It is also recommended to reset the settings of your fob, which can help to restore the same response from the car. The process varies from vehicle to vehicle, so the owner's manual or a phone call to the manufacturer's help line is probably the best guide here.


Other factors, including interference from other devices operating on the same frequency can also affect weak signals. Other key fobs and wireless communication devices can interfere with the RF (radio-frequency) signals your key fob transmits to connect to the vehicle's receiver.

Additionally, physical damage to your key fob can also interfere with the transmission of RF signals which may result in poor performance and range. A blown fuse, a broken or cracked button or a bent case of the fob can affect the transmission of signals and cause the remote not to function properly.

You can fix the problem by resetting the settings on your fob, or by replacing the battery. If your fob has become old and worn, it could be the right time to replace it.

Don't forget to utilize the spare remote that came with your car if your primary remote starts to fail. It's worth trying this option to determine if it resolves the issue before you invest in a new one. In this instance, it might be time to call an auto-locksmith professional. They'll be able to diagnose the problem and suggest the most effective solution.

Physical Damage

Key fobs can be troublesome at times. Luckily, the majority of these problems are not complicated or a major issue and can be fixed with some simple steps. It's a good idea also to keep spare batteries or a different fob on hand in case your key fails to function.

The most frequent cause for a car key fob not working is an inactive battery. These tiny devices are powered by lithium-ion button or coin cell batteries. They are easy to replace and can be found at most pharmacies, grocery stores and places that sell electronics. You can open your fob's shell with a screwdriver with a flat head and gently remove the existing battery. Replace the battery, making sure it's not damaged or loose. Most fobs require batteries that are CR2032. However, yours may need a different type.

Your fob could also stop responding to the buttons when it loses its pairing with the car. This can be caused by various reasons including changing the batteries. However it is possible to fix the issue with an auto Locksmith or local dealership can usually fix it.

You can try this method to fix your fob when none of the other methods work: remove the battery from both the car and the fob for around ten minutes, and then reconnect them in the opposite order. This may cause the system to reboot, and in some cases, this will fix the issue without any other steps.

When you're playing around with the fob, ensure to keep it away from water and other possible dangers. The fob is a durable device however, you must take care of it to ensure that it lasts as long as it can.

If none of the troubleshooting steps above help you, you may have to replace your key fob. If it's been thrown around, trodden on or subjected to other extreme environmental conditions, it could be beyond repair and requires a replacement. Find the most affordable price.

Lost Fob

Even with the best of care keys to cars can fail at times. It can be expensive to replace yours in the event that you lose it and especially when you don't have an alternative. "You may end up spending $50 or more to purchase a new replacement from the dealer and then have it programmed, as well as a new mechanical backup which will cost at least another $100," says Mel Yu, an automotive analyst with Consumer Reports.

A weak battery is one of the most common causes for a keyfob to stop working. If you are aware of how to replace the battery, or if the owner's guide has instructions, you can try it yourself. If this doesn't work, you'll have to call an expert.

A locksmith will be capable of helping you locate your lost fob, or get it replaced. They will also likely have a good idea of the reason why your fob was not working in the first instance. If your car is old and doesn't include smart technology it is still possible to save money by recording the key's number plate of your mechanical backup key. It's typically hidden behind a decorative keychain. If you need to reprogram the key fob of your car, the locksmith can do it much more quickly.

If your key fob is an older smart key, it will need to be deprogrammed by a locksmith or car dealer. This can cost more than replacing it. That's because modern key fobs employ rolling-code encryption to stop thieves from accessing the car. And that means locksmiths need an exclusive programming tool that only the car manufacturer has, which increases the overall cost.

In the majority of cases, the entire process will be charged one time. This includes all costs for reprogramming a keyfob. Depending on the vehicle the cost can range from $20 at some stores to $200 or more at a dealership for cars.