How to Repair a Dead Car Key

Extreme heat or cold can cause the car to stop functioning. Try waiting a little while before spending money to replace it.

It's quite a hassle when keys to your car break and it happens at the most inconvenient times! There are several ways to fix a broken car key that don't require an entirely new one.

Dead Key Fob Batteries

Modern key fobs allow us to unlock doors, trunks and tailgates easily without the need to search for a physical car key. Some key fobs even come with an inbuilt key that can be used to start our vehicles. However, these key fobs depend on a small battery that powers their remote functions. If the battery fails then the key fob cannot transmit the signal needed to start the vehicle. Luckily, there are several ways to fix a dead key fob and get your car operating again.

First, check whether the key fob actually dead. If it appears to be, then you'll have to replace the battery. You can do it yourself by disconnecting the fob from its clip, or by using a screwdriver with a flat head. You should not apply too much force or you may damage the fob. It is also essential to make sure that you replace the correct type of battery. Certain models might require a different type of battery. You can find out what kind of battery your vehicle requires by consulting the owner's manual, or you can visit an Interstate All Battery Center and get a specialist in battery care to assist you.

If the key fob isn't dead, you can revive it by bringing it closer to your vehicle. Since the majority of key fobs use RFID (radio-frequency identification) they only function at a limited distance and need to be within a certain distance for the ignition system to recognize the signal. You can unlock your car, or even start it if you move a few inches closer.

Many car manufacturers have an emergency mechanism that can be triggered when the battery for the key fob is dead. Ford for instance, has a slot that is dedicated to the key fob. If it is properly inserted the key fob can be used to start the engine of the car. You can find the instructions in the owner's manual on how to locate this slot and insert the key fob in the correct way. If you are unable to start your car using this method, make sure to contact roadside assistance for assistance.

Broken Key Ring

The chip in the key fob is the one that communicates with your vehicle's immobilizer system to begin the engine. If the chip is damaged or there are programming errors, the key fob will not be able to transmit the correct identification code, and your car won't start. A damaged transponder may be caused by physical damage to the key shell, or wear and tear on the contact pads.

There are often warning indicators on your dashboard if a keyfob has trouble communicating with the immobilizer system of your vehicle. These include error messages, flashing lights or the key not locking the car. If you are noticing any of these warnings, contact your local locksmith right away to repair your key fob or replacement.


When you carry many keys, it's easy to scratch your key ring. This could cause the key fob to snap in half, which is one of the most common causes of broken car keys. If this happens, attempt to use super glue to repair it by applying a small amount of the glue to both sides of the break and then gently pressing them together. Use a gel-type of glue that drys slowly so that you don't risk drips or runniness.

If this method doesn't work then you must contact a professional locksmith immediately to prevent further damage to your vehicle. A locksmith with the right qualifications will be able to repair or replace your fob swiftly and ensure that the ignition and door locks aren't damaged in the process.

If your key fob gets damaged it can be a hassle and a nuisance. It's not a reason for anxiety or anger. You can make proactive steps to lessen the likelihood of your key fob failing in the near future. This includes regular maintenance, key protectors and having an extra. Quicksmith's team is available to assist you if your key fob breaks.

Broken Key Loop

One of my MK5 keysfobs snapped off the little key ring that is at the top, where it connects to the keyfob. It appears to be made of extremely soft plastic or metal. I've drilled a hole, and then wet-sanded it to strengthen it but I'm guessing the problem isn't resolved by that.

I've also tried to wrap the broken ring with clear tape but it didn't work as good. This is a pity, as I rely on the small split rings to keep my keys in place.

If the case of the key fob is damaged, you could usually open it and replace the battery if it is not already dead. There are online kits available however they're only an interim solution. It is more efficient to have it repaired by a mechanic. Alternatively, you might find the replacement case at a home improvement store or a locksmith. key repairs near me 're not likely to be as expensive as an entirely new key fob.