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Key Fob Replacement and Repair

The key fobs found in modern cars do a lot of work and are subject to an awful amount of abuse. In many cases just a simple replacement or repair is all that's required to bring them back into good working good working order.

The majority of fobs are powered by a flat watch-style battery, which can be found in hardware and auto parts stores. Before you call an expert, you can try a few DIY solutions!

Dead Key Fob Battery

The key fob battery powers the remote function in your car. It also, with push-to-start vehicles, allows it to start your engine. As a result, it is essential to keep an active, healthy battery. When you're on the move, a dead key fob could be a major issue. The good news is that a cheap, simple replacement can be made to fix it in a short time.

The most obvious sign that a key fob's battery is failing is the loss of signal strength and range. You may also be noticing that the buttons on your fob do not work or require extra effort to activate.

A new key fob is available in the auto parts section of a major retailer or on the internet. Typically, they're CR2032 or CR2025 batteries that are sold in packs of two or more. Make sure to consult your owner's manual prior to you purchase the correct battery. Certain cars require a certain size or type that isn't always available at big-box stores. Make sure to verify before you buy.

The battery is usually found on the back of the key fob. It is removed using a flat-bladed screwdriver by removing the case. It will usually resemble a small coin and be labelled with the battery's size. Be sure to note which way the plus and minus symbols are placed to ensure that the new battery is properly placed. After the replacement battery has been inserted, gently snap both pieces of the fob in place and test all of the buttons to ensure they work.

If your key fob still does not work after replacing the battery, it could be deprogrammed. In this instance it is likely that a locksmith will be required to assist. This will cost more than just replacing the battery in the key fob.

Whether your fob battery is dying or you're having other issues with your key fob an experienced mechanic such as one from YourMechanic can inspect and repair it to get you back on the road. Make an appointment to look over the range of services we offer in your region.

Weak Signals

If your key fob isn't able to respond to the buttons of the remote it could be a sign that the signaling isn't functioning correctly. Your car and key fob are dependent on radio signals to communicate, therefore weak or inconsistent signals could cause poor range and performance.

One of the first things to determine is if your fob's battery is insufficient because this could significantly impact signal sensitivity. It is also recommended to reset the settings of your fob and help bring back the same response from the car. The procedure varies from vehicle to vehicle, so your owner's manual or call to the help line of the manufacturer is likely to be the best resource here.

Other factors, such as interference from other devices that operate on the same frequency, can also cause weak signals. remote key fob repair and wireless communication devices may interfere with the signal RF (radio-frequency) signals your key fob transmits to the vehicle's receiver.

Physical damage to your keyfob can also interfere with the transmission of radio signal, which can result in poor performance and range. A damaged or blown fuse, a broken or cracked buttons or a bent case could interfere with the transmission of signals, causing the remote to fail to respond.

You can solve the issue by resetting your fob's settings, or by replacing the battery. If your fob is old and damaged, it's the time to replace it all over again.

Also, don't forget if you have an extra key fob which comes with your vehicle, it could be used instead of the primary remote in case it starts to fail. Try this method first to see if it can fix the problem before purchasing a new remote. If not, this might be the perfect time to contact an expert auto locksmith. They will be able to identify the issue and recommend the best course of actions.

Physical Damage

It's not common for key fobs to have issues from time to time. Fortunately, most of these problems are not difficult or complicated and can be solved with some simple steps. It's also a good idea to have spare batteries or an additional fob in case one of your keys ever ceases to function.

A dead battery is the most frequent reason for a car keyfob not working. These tiny devices are powered by lithium-ion button or coin cell batteries. They can be replaced easily and can be found at most pharmacies, grocery stores and places that sell electronics. You can access the fob's case using an screwdriver that has a flat-head and gently pull out the existing battery. Make sure it's not damaged or loose and then put in an alternative battery. Most fobs use CR2032 batteries, but yours might require an alternative kind.

If your device loses pairing, it may also cease to respond to buttons. This could be due to a variety of factors including changing the batteries. However an auto Locksmith or a local dealership will usually be able to solve the issue.

If none of the methods above work, you can try this trick: unplug the batteries from the car and fob for a short period of time and then reconnect them in reverse order. This could trigger a reboot within the system and, in some instances this will fix the issue without having to do any of the other steps.

While you're testing the fob, ensure to keep it away from water and other damage sources. A fob can be pretty robust, but it's crucial to treat it with care when you want it to last as long as it can.

If none of the troubleshooting procedures above work 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 damaged beyond repair and in need of a replacement. If this is the case, make sure to search for a deal prior to making your final choice.

Lost Fob

Even with the best of care it's a fact of life that car key fobs will occasionally fail to function. If you lose yours it can be extremely expensive to replace it, especially if you don't have a spare. "You might end up paying $50 or more for a new replacement from the dealer and have it programmed, and a new mechanical backup, which will cost at most another $100," says Mel Yu, an automotive analyst with Consumer Reports.

One of the most common reasons for a key fob to stop working is a basic issue, like an insufficient battery. Try changing the battery on your own when you know how, or consult your owner's manual. If that doesn't work, you'll need to call an expert.


A locksmith can assist you to find or replace your lost key fob. A locksmith will likely know why your fob stopped functioning in the first in the first place. If your car is older and does not have smart technology built in it is still possible to save money by recording the key number plate on your mechanical backup key. It's typically hidden behind a keychain with an ornamental design. This will make it easier for the locksmith to reprogram a brand new key fob to your car should you need to do it.

If your current key fob is a modern smart key, you'll have to visit an auto dealer or locksmith to deprogram it and get a new one made which is more expensive than simply replacing it. Modern key fobs are protected by encryption using rolling-codes that prevents thieves from gaining access to your car. And that means the locksmith needs to have a special programing tool that only the car manufacturer has, which increases the overall expense.

In most instances, you'll have to pay for the entire service at once, including any costs to reprogram a new key fob. Based on the car it could cost anywhere from $20 at some stores to $200 or more at a car dealership.