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how to repair broken car key to Fix a Key Fob That isn't Working

If your key fob isn't working, a few easy steps can fix it. The first step is to make sure it's not the backup remote.

If your backup remote is unable to lock and unlock the doors of your vehicle, it is most likely that the primary remote is not working. The most common causes of key malfunctions for car remotes are circuitry or battery issues.

Battery

The battery in the key fob may get worn out over the course of time. It is fairly easy to replace batteries, but it is essential to ensure you use the right type that you can refer to your owner's manual or contact the manufacturer's dealer to find out what kind of battery you need. It is also a good idea to examine the battery compartment thoroughly because dead batteries can leak caustic chemicals that can damage the remote. If replacing the batteries doesn't solve the problem, it may be that there are other issues that require professional attention. For Near By instance, if buttons seem stuck or broken It may be necessary to take the remote apart and rework its components. You could also try reprogramming your vehicle to recognize the new key fob.

Buttons

Key fobs can become dirty and worn-out from repeated use. It is not uncommon for buttons to cease working, or to require a hefty push to make them work. This can be a hassle especially when you're away from home and have to switch on your car. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and a few items you might already have in the house.

First, check that the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully open the remote and examine the circuit board. Check for signs of corrosion or other indications that the buttons are worn or damaged, such as missing the conductive paint. Utilizing a Q-tip dipped in alcohol to gently clean any membrane contacts that have become damaged or where conductive paint is missing. Be careful not to rub too hard, as this can erode the conductive painting and prevent the button firing when the button is pressed.

Check the battery connector terminals for loose solder connections. Soldering them back into place can restore the button's functionality If this is the case. The same process can be used to restore function to any loose connections inside the fob.

In the end, if any of the rubber buttons on the front of the key fob aren't functioning or require a long press to function, it is likely that the graphite disks on the back of the button are wearing down and need to be replaced. This can be done by rubbing a pencil across the disks, which will bring the button back to its original state.

If none of these solutions work, or if you still cannot get the button to respond when pressed hard, it is possible that the circuitry has failed. It is possible to fix the issue by cleaning and re-soldering the fob, but you should have an extra in case it doesn't work.

Circuitry

Whether or not the key fob buttons are working the circuit board in the remote could be dirty. A very thorough inspection is usually enough to fix this problem. The most common causes for dirty circuit boards is water and damaged cases. A damaged case could let water and other debris to enter the circuit board, which can cause it to short. Water can also eat through pins and vias, which are tiny connectors found on the board.

If you're handy enough to remove your key fob and aren't afraid of some mess, we can de-solder the buttons and then solder new ones in their place. Also, it's worth checking the connections between the battery terminals. They can become extremely dirty and if they're loose the buttons might not work or even stay in their down position. Soldering the terminals, and putting the button back in their place is generally all that's required to return a non-working key fob to functioning condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are more durable than the remote fobs that contain them but they can be damaged by a hole that is that is drilled into them or over by a lawnmower or car door handle. Most of the time non-remote transponder chip malfunctions can be attributed to blowing fuses.

If you're not comfortable opening the key fob, remove the circuitboard and utilize a multimeter to determine if the diode is functioning properly. If you're not sure with this, you can visit your local Oreilly or hardware store and use their RF frequency tester. This will tell you whether the key fob is sending an RF signal.

Programming

repair key fob fobs aren't impervious to destruction and are susceptible to being damaged by a lot of things. They may lose their connection to the car's receiver due to shock or a low battery, which requires the reprogramming. A professional auto locksmith or a main dealer can reprogram your key fob to get it working again. If resetting or replacing your key fob fails, you may need to replace it.