Modern car key fobs are utilized frequently and are often abused. In many cases an easy replacement or repair is all that's required to restore them to working order.
The majority of fobs are powered by a flat watch-style battery, which is readily available in auto parts and hardware stores. Before calling a professional, you can do some DIY fixes.
Dead Key Fob Batteries
The battery of the key fob powers the remote you have in your car, and in push-to-start cars it will start your engine. It is therefore crucial to keep a functioning healthy and a good battery. A dead key fob is an issue for anyone traveling. A simple, inexpensive replacement will solve the issue quickly.
The loss of range and signal strength are among the most common signs that a keyfob battery is dying. It is also possible to find that the buttons on the fob don't work or require additional effort to be activated.
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 and CR2025 and are available in packs of 2 or more. Make sure to consult your owner's manual prior to you decide on the best battery. Certain cars require a specific size or kind of battery that's not always readily available at big-box retailers, so be sure to be aware of the correct specifications before you purchase.
Typically the battery is situated on the back of your key fob and is removed by tearing the case open using an abrasive screwdriver with a flat blade. It is usually shaped like an ordinary coin and will be marked with the battery's size. Make sure to note the orientation of the plus and minus symbols to ensure that you put the new battery in the correct place. Once the battery replacement is placed in the fob, gently snap both pieces of the fob in place and test the buttons to ensure that they work.
If your key fob still doesn't work after replacing the battery, it may have been deprogrammed. In this case you will require a locksmith required to assist. This will cost more than just replacing the key fob's battery.

Whether your fob battery is failing or you're experiencing other issues with your fob's battery An experienced mechanic like one from YourMechanic can inspect and repair it to get you back on the road. Make an appointment to look over all of the services we provide in your local area.
Weak Signals
If your key fob does not respond to the buttons of the remote it could be a sign that the signaling is not functioning properly. Radio signals are used to transmit information between your car and the key fob. Inconsistent or weak radio signals can cause low performance and limited range.
Checking the battery level of your fob is a good idea, as it can affect the sensitivity of the signal. It's also advisable to reset the settings of your fob that can help bring back the same response from the car. The procedure differs from vehicle to vehicle, so the owner's manual or call to the helpline of the manufacturer is probably the best guide here.
Other factors can cause weak fob signals, such as interference from other devices operating on the same frequency as your key fob. Other key fobs as well as wireless communication devices can interfere with the radio frequency (radio-frequency) signals your key fob transmits to connect to the vehicle's receiver.
Furthermore, physical damage to your key fob can affect the transmission of signals RF, which may result in poor range and performance. A blown fuse, broken or cracked buttons or bent fob case could interfere with the transmission of signals, causing the remote to fail to respond.
You can attempt to fix the problem by resetting your fob's settings or by replacing the battery. If your fob is old and worn out, it might be time to replace it.
Don't forget to use the spare remote that came with your car if your primary remote begins to fail. Try this method first to see if you can resolve the issue before buying a new remote. In this instance it could be the right an appropriate time to consult an expert auto-locksmith. They will be able to identify the issue and suggest the most effective course of action.
Physical Damage
It's not common for key fobs to encounter issues from time-to-time. Most of the time, these issues are not complex or serious and can be resolved with a few simple steps. It's important to keep spare batteries or an additional fob in case one of your keys stops working.
The most frequent reason for the car key fob not working is a dead battery. These tiny devices depend on tiny lithium-ion coin or button cell batteries to function. They are easy to replace and can be found at most pharmacies, grocery stores, and other places that sell electronics. Open the fob's case with an screwdriver that is flat, and gently pry out your existing battery. Make sure it's not damaged or loose and then insert an alternative battery. Most fobs require batteries that are CR2032. However, repair car key may need a different type.
Your fob might also stop responding to buttons after losing its connection to the car. This could be due to various reasons, such as changing the batteries. However an auto Locksmith or a local dealer can usually solve the issue.
If none of the solutions above work, you can try this method: disconnect the batteries from the car and fob for a short period of time and then connect them in reverse order. This may cause the system to restart and in certain cases it can fix the issue without any other steps.
When you're playing around with the fob, ensure to keep it away from water and other potential sources of damage. The fob is a durable device but you need to treat it with care to ensure it lasts as long as it can.
If all of the above troubleshooting suggestions do not help, it may be time to consider replacing your key fob. If it's been thrown, trampled on or exposed to harsh environmental conditions, it may not be able to be repaired and may require a replacement. If that's the case, be sure to look around to find a bargain before making your final choice.
Lost Fob
Even with the best of care it's a fact in the road that car key fobs can sometimes fail to function. If you lose yours it could be a huge expense to replace it, particularly if you don't have a spare. "You may end up spending $50 or more to get an equivalent replacement from the dealer and then have it programmed, and a new mechanical backup which could cost you at least another $100," says Mel Yu, an automotive analyst with Consumer Reports.
One of the most common reasons for a key fob's device to not function is a simple issue, like an insufficient battery. If you are familiar with how to change the battery, or if the owner's guide has instructions, you can try it yourself. But if that doesn't fix the issue, it's time to get help from an expert.
A locksmith can assist you to replace or locate your lost key fob. They will also likely have an idea of the reason why your fob was not working in the first instance. And if your vehicle is a model older than the one you own and has no smart technology built-in, you can save some cash by locating the key number plate on your current mechanical backup key (it's usually hidden behind a keychain ornament with a decorative design) and storing it in a secure location, such as your wallet or on your phone. If you're looking to change the programming of the key fob in your car the locksmith can perform the task more easily.
If your key fob is an old smart key, it'll have to be deprogrammed by a locksmith or a car dealer. This could cost more than replacing it. Modern key fobs are protected by rolling-code encryption that prevents thieves from gaining access to the car. This means that the locksmith needs to have a special programing tool that only the vehicle manufacturer has, which increases the overall cost.
In most instances, you'll need to pay for the entire service at once, including any costs to reprogram a new key fob. Based on the car the cost can range from a mere $20 at some shops to $200 or more at a car dealer.