A key that snaps inside a lock is one of those small problems that can ruin a whole day. One moment you are turning the key in your front door, your office door or your car, and the next you are holding half a key while the other half sits deep inside the cylinder. The good news is that a broken key is usually fixable, and in many cases the lock itself can be saved. The wrong first move, though, can push the piece deeper or damage the lock.
This guide explains why keys break, what to do in the first few minutes, what not to try, and when it makes sense to call a locksmith. If you are in Hawthorne or a nearby city and need help now, call Macmanuel Lock & Key Services at (424) 297-4396.
Why Keys Break Inside Locks
Keys rarely snap for no reason. Most of the time, something has been building up for a while. The most common causes are:
- Worn or thin keys. Keys wear down with daily use. An old key, or a copy cut from an already worn key, has less metal and bends more easily.
- A lock that is getting stiff. Dirt, old lubricant or worn pins make the cylinder harder to turn, so you use more force without noticing.
- A door that is out of line. When a door sags or the frame shifts, the bolt drags against the strike plate. The key ends up doing the work of pulling the door into place.
- Heavy keychains. A big bundle of keys hanging from the ignition or a door lock puts constant strain on the key that is in use.
- Using the key as a lever. Pulling a door shut by the key, or twisting hard to force a sticky lock, is a quick way to snap it.
If your key has been bending, feels loose in the lock or needs jiggling, those are warning signs that a break may be coming. Our guide Signs Your Door Lock Needs Repair covers more of them.
What to Do Right After a Key Breaks in a Lock
Take a minute before you try anything. These steps help you avoid making the job harder.
1. Stop turning and do not push the piece in
Do not try to use the remaining half of the key to turn the lock, and do not push it back in. Either move can drive the broken piece further into the cylinder and make it harder to remove.
2. Check how much of the key is showing
If a small part of the broken piece sticks out, you may be able to grip it gently and pull it straight out. Pull straight, not at an angle, and stop if it does not move easily. If nothing is showing, leave it alone.
3. Note where the lock was when it broke
Was the key straight up, as it is when you put it in, or was it partly turned? A locksmith will want to know, because a key that broke mid-turn can leave the cylinder in a position where the piece cannot slide out until the cylinder is turned back.
4. Keep both halves
Hold on to the broken pieces. In many cases a locksmith can use them to cut a new key, which can save time, especially when you do not have a spare.
What Not to Try
Online tips for broken keys range from helpful to harmful. Avoid these:
- Super glue on the broken half. If the glue drips into the cylinder, it can seal the pins and turn a simple extraction into a full lock replacement.
- Digging with a screwdriver or knife. These tools are too thick and usually push the piece deeper or scratch the inside of the lock.
- Forcing the door. Kicking, prying or shouldering the door can damage the frame, the strike plate and the lock, turning a small problem into a much bigger repair.
Key Broken in a House or Apartment Door
For a home, the first question is whether you can still get inside. If another door is unlocked or someone else has a spare key, you have time to arrange a calm repair. If not, the situation is a lockout and a locksmith can usually help with both: getting you in and getting the broken piece out. See our House Lockout Services page for how lockouts are handled.
Once the piece is out, the locksmith will check the cylinder. If it turns smoothly, a new key may be all you need. If the pins are worn or the lock was already stiff, repair or replacement may be the better choice so it does not happen again. Our Lock Repair Services page explains what a repair usually involves.
A broken key is also a good moment to think about who else has copies. If you have recently moved, or keys have been lost over the years, rekeying makes every old key stop working. Learn more on our Lock Rekeying Services page.
Key Broken in a Car Door or Ignition
Car keys break for the same reasons as house keys, but the stakes can feel higher when you are far from home. If the key snapped in the door lock, you may still be able to unlock the car using a remote or another door. If the car is locked and you have no other way in, it becomes a car lockout. Our Car Lockout Service page explains what to expect.
A key broken in the ignition needs extra care. Do not try to start the car with the broken half or a tool. Many modern keys also contain a chip, so even after the broken piece is removed, a replacement key may need to be cut and programmed before the car will start. If the ignition was already sticking before the key broke, the cylinder itself may need attention. See our Car Ignition Replacement & Repair page for more.
When to Call a Locksmith
Call a locksmith if:
- No part of the broken key is showing
- You tried pulling the piece out gently and it did not move
- The broken key has left you locked out of your home, business or car
- The key broke in the ignition
- The lock was already stiff, loose or hard to turn before the key broke
- You do not have a working spare key
When you call, have the address or cross streets ready, say whether it is a home, business or vehicle, and mention where the key broke. For security, a locksmith will ask for photo ID and proof that you live at the property or own the vehicle before opening anything or making a key.
Macmanuel Lock & Key Services is a mobile locksmith based in Hawthorne, CA, and also serves nearby cities. Customers to the east can see our locksmith in Compton, CA page for local details.
How to Stop It Happening Again
- Replace worn keys early. If a key is bent, cracked or noticeably thinner than a newer copy, have a fresh one made from a good key, not from the worn one. Our Key Duplication page covers spare keys.
- Do not force a sticky lock. If a key needs real effort to turn, the lock or the door needs attention. Fixing it now is easier than extracting a broken key later.
Frequently Asked Questions
Can a broken key be removed without replacing the lock?
Often, yes. A locksmith uses thin extraction tools to pull the piece out, and if the cylinder is not damaged, the lock can keep working with a new key.
Can a locksmith make a new key from the broken pieces?
In many cases, yes. If both halves are available and not too damaged, they can be used to cut a new key. Car keys with chips may also need programming.
Should I use glue to pull out a broken key?
No. Glue can run into the lock and seal the pins, which may mean the whole cylinder has to be replaced.
What should I do if my key broke in the ignition?
Do not try to start the car with the broken half or a tool. Call a locksmith, and mention whether the ignition was sticking before the key broke.
How much does it cost to remove a broken key?
It depends on the type of lock, whether you are locked out and whether a new key or lock work is needed. Call (424) 297-4396 and describe the situation for a quote.
Need Help With a Broken Key?
If a key has snapped in your door, car or ignition, call Macmanuel Lock & Key Services at (424) 297-4396. Tell us where you are and what happened, and we will explain your options. You can also reach us through our Contact Us page.
Related: for a broken or damaged car key, see our key fob replacement page. If a lock keeps failing, read signs your door lock needs repair.