How a Broken Car Key Is Extracted
A broken car key is extracted through the keyway, where a thin extraction tool slides in beside the snapped blade, catches its cuts and draws the fragment out, with the lock left in place in the vehicle.
Inta-Lock Car Key Guides. Updated October 2026.
The fragment stays stuck because the wafers inside the lock press into the cuts of the blade and no head is left to pull on. How far in the fragment sits, and the position the lock was turned to when the key snapped, decide how the extraction runs.
An extraction through the keyway leaves a sound lock as it was. Once the fragment is out, the lock is checked, a new blade is cut, the transponder chip from the head of the old key is carried over or a new chip is programmed, and the finished key is tested in the car.
How Is a Broken Car Key Extracted From a Lock?
A broken car key is extracted through the keyway of the lock, where a thin extraction tool slides in beside the snapped blade, grips a cut along its edge and draws the fragment out.
The keyway is the slot the key enters. Extraction sends the fragment back out along the same path, so nothing is drilled and the lock stays in the door or the steering column.
The extraction tool is thinner than the blade. It passes through the gap between the blade and the wall of the keyway, reaches a cut in the key and holds it there. The pull runs straight, in line with the keyway.
The tool is matched to the keyway and the blade, and both differ with the make, the model and the year of the car.
Why Does a Snapped Key Stay Stuck in the Lock?
A snapped key stays stuck in the lock because spring loaded wafers inside the lock press into the cuts of the blade, and the fragment has no head left for a hand to grip.
A car lock holds a row of thin metal plates called wafers. Each wafer is pushed by a small spring, and the cuts of the key set each one to the height that lets the lock turn. The same wafers hold a broken blade in place.
A whole key leaves the lock because the hand pulls on the head and the wafers ride over the cuts. A fragment has no head, so fingers and pliers find nothing to hold once the broken end sits level with the face of the lock.
A key withdraws from a lock in one position only, the position in which it went in. A blade that snapped while the lock was turned is held by the wafers until the lock is brought back to that position.
How Does the Position of the Fragment Change Extraction?
The position of the fragment changes how far the extraction tool reaches and whether the lock is turned back first, and five states cover a snapped blade in a car lock.
| State of the fragment | What holds it in the lock | What changes in the extraction | What is checked once it is out |
|---|---|---|---|
| Broken end stands proud of the keyway | The wafers that sit in the cuts of the blade | The broken end is gripped directly and drawn straight out | The lock is turned and felt for stiffness |
| Broken end sits level with the face of the lock | The wafers, with no metal left outside the lock to grip | The extraction tool enters beside the blade and catches a cut | The wafers are checked for free movement |
| Fragment pushed deep into the keyway | The wafers along the full length of the blade | The tool reaches further along the blade before it catches a cut | The keyway is checked for anything pushed in with the fragment |
| Lock turned away from the position in which a key withdraws | The wafers, which are shut in by the body of the lock and do not ride over the cuts | The lock is brought back to the withdrawal position before the fragment is drawn out | The ignition or the door lock is turned through each of its positions |
| Glue, a broken tool or dirt in the keyway beside the fragment | The foreign material, which bonds or wedges the blade to the wafers | The keyway is cleared before the fragment is drawn out, and what applies for the lock is confirmed on the call | The lock is assessed for repair before a new key is cut |
The table sets out what each state changes in the work, not what it costs. A quote is agreed before work begins, and the state of the fragment is a useful detail to have ready for the call.
A key snapped in the ignition or a door lock in Leicester or Leicestershire? Matt attends the vehicle himself, and a quote is agreed before work begins.
Call Matt on 0116 442 2084What Do You Do Before the Locksmith Arrives?
Five steps keep the fragment where it is and keep the car safe until the locksmith arrives.
- Stop turning and stop pulling. Leave the fragment in the lock exactly as it sits, because each attempt with pliers, tweezers, a screwdriver or glue pushes the blade deeper or fixes it to the wafers.
- Keep the head of the key and any loose piece of blade together. The head holds the transponder chip, and the pieces show the cuts of the blade.
- Look at the lock without touching it. Note whether the broken end stands proud, sits level or sits deep, and note the position the ignition was in when the key snapped.
- Make the car safe where it stands. The Highway Code rules on breakdowns say to get the vehicle off the road if possible and to warn other traffic with hazard warning lights where the vehicle is causing an obstruction.
- Call Matt on 0116 442 2084 with the make, the model, the year and the registration, and say which lock holds the fragment. A quote is agreed before work begins. Matt is with you within the hour in Leicester, and the same day across Leicestershire.
With the fragment in the ignition and the steering lock on, the steering wheel is left alone as well, because force on the wheel loads the lock that holds the blade.
Does Extraction Damage the Ignition or the Door Lock?
No, extraction through the keyway does not damage an ignition or a door lock that is in working order, because the fragment leaves by the path a key leaves by.
Nothing is drilled and nothing is cut. The wafers move as they move for a key, and the lock stays in the vehicle.
Damage comes from what happened before the extraction. A lock stiff enough to snap a blade is often worn already, and glue or a forced tool in the keyway bends the wafers. Where the lock itself is at fault, a quote is agreed before work begins on it.
What Happens After the Broken Key Is Out?
Four things happen after the broken key is out, and together they turn a cleared lock into a car that locks and starts again.
- The lock is checked. The empty lock is turned through its positions and felt for stiffness, so a worn lock is found before a new blade meets the same resistance.
- A new blade is cut. A snapped blade is not joined back together, because the joint carries the full turning force of the lock. A new blade is cut with the two pieces of the old key as the pattern or to the key data of the vehicle, and the route for the car is confirmed on the call.
- The chip is dealt with. The transponder chip sits in the head of the key, away from the break. It is carried into the new key where the key design allows, and where it does not, a new chip is programmed to the immobiliser of the car. Which of the two applies is confirmed on the call.
- The key is tested. A finished key is proven in the ignition and in the door lock, where it turns each lock and starts the car.
Identity and authority to request the work are checked before a new key is cut. The V5C vehicle registration certificate, which names the registered keeper, and photo identification are common examples, and what applies is confirmed on the call.
The service itself, with each place a key breaks, is set out under broken car key extraction in Leicester.
Why Does a Car Key Snap Inside a Lock?
A car key snaps inside a lock because the turning force that passes through the blade exceeds what worn or weakened metal holds.
- A blade weakened by wear. Years of turning thin the metal of the blade and leave fine cracks in it. The blade then gives way where it is thinnest, at a deep cut or where it meets the head of the key.
- A lock that resists. Worn, dirty or dry wafers resist the key, so more force passes through the blade on each turn. Cold weather stiffens a lock in the same way.
- A steering lock under load. With the steering wheel turned hard against the steering lock, the ignition does not turn freely and the blade takes the strain.
A key that has to be jiggled, a bent blade and a lock that grows stiffer are the signs that come before a snap.
Which Situations Come Before and After a Snapped Key?
Four situations sit beside a blade snapped in a lock, and each one is set out on its own page.
How Does Key Extraction Differ From Ignition Repair?
Key extraction removes a broken blade from a lock that is otherwise sound, while ignition repair puts right a barrel or a switch that is itself at fault.
The two meet when a barrel stays stiff after the fragment is out. The stiffness is then a fault of the barrel and not of the key, and that work belongs to ignition repair, where barrel and switch faults are set out.
What About a Whole Key That Refuses to Turn?
A key that is whole and refuses to turn is a warning and not yet a break. The steering lock, a worn blade and worn wafers are the usual causes, and the checks are set out for a car key that does not turn in the ignition.
Force on a key in that state is what snaps the blade.
Which Blade Replaces the Snapped One?
A snapped blade is replaced by a newly cut blade and not by a joined one. The blade profiles and the methods of cutting a car key blade are set out on their own page.
What Keeps the Next Key From Snapping?
A blade lasts longer in a lock that turns freely. The habits that protect both are covered under how to maintain car keys and locks.
A second key shares the wear and covers the day one key fails. Thatcham Research advises the owner of a second hand vehicle bought with only one working key to have a spare added as soon as possible.
Broken car key extraction in Leicester is carried out at the vehicle, and the phone is answered 24 hours a day.
Frequently Asked Questions
Is a broken key removed without taking the lock apart?
Yes, a broken key is removed through the keyway without taking the lock apart where the lock is sound and the keyway is clear.
Glue, a broken tool or a damaged lock changes that. What applies for the lock is confirmed on the call, and a quote is agreed before work begins.
Is it safe to pull a snapped key out with pliers?
No, pliers slip on the broken end of a snapped key and push the fragment deeper into the lock.
Pliers hold only a fragment that stands well proud of the keyway.
Does a spare key work while the fragment is in the lock?
No, a spare key does not enter a lock that still holds a fragment, because the broken blade fills the keyway.
A fragment in the door lock leaves the ignition clear, so the spare still turns the ignition.
How much does broken key extraction cost?
The cost of broken key extraction is quoted for the individual job, and a quote is agreed before work begins.
A fragment deep in the keyway, a lock turned away from its withdrawal position, glue in the keyway and a chip to carry over or programme each add work and raise the figure. No price list is published.
How long does it take to extract a broken key?
The time an extraction takes depends on the lock, the depth of the fragment and the state of the keyway, and it is confirmed on the call.
Matt is with you within the hour in Leicester, and the same day across Leicestershire.
What does a locksmith check before cutting the new key?
Identity and authority to request the work are checked before a new key is cut.
The V5C vehicle registration certificate and photo identification are common examples, and what applies is confirmed on the call.