A key broken off in the ignition: what to do next

Pause before you touch the ignition

An ignition cylinder is a precise part, and it sits behind the steering column where a wrong move is hard to undo. Take your hand off the key piece. Look at what is left. Is any of the blade sticking out of the slot, or is it flush or recessed? Is the car in park, and is the steering wheel locked in position?

Then look at the half you are holding. Keep it. The cuts on the blade matter, and so does the head, which may hold a small electronic chip that the car needs to recognize a key. If the head is in your hand and the blade is in the ignition, both pieces carry value. If the head is still in the ignition, do not twist it.

Put the vehicle in park if it is not already there, apply the parking brake, and turn off anything that does not need to be on. Switch off the lights if the engine is not running, so you do not drain the battery. Then take a breath. Nothing about a broken ignition key is urgent in the way a child in a locked car is urgent. It is a problem to solve in order.

Write down, or say aloud, the order of events while it is fresh. Where were you when the key broke? Was the engine running, or had you just parked? Did the key feel loose or stiff beforehand? A dispatcher listens for these details because they separate a simple worn key from a damaged column. Calm facts also steady your own nerves.

Why ignition keys break

An ignition key does more than a door key. It lifts the wafers or pins inside the cylinder, it turns against spring pressure, and it often has to overcome the steering lock as well. That is a lot of leverage on a thin blade, particularly when the steering wheel is turned and the key is being forced.

The usual causes are wear, a heavy key ring and a stiff cylinder. A key ring loaded with other keys, a bottle opener and a bunch of charms hangs from the ignition and swings with every bump in the road. Over months, that weight wears the cylinder and fatigues the key. Cold mornings make it worse, because metal shrinks and lubricants thicken. When the key finally gives, it is usually at a moment of effort, such as trying to turn the key while the steering wheel is locked against it. Our guide on an ignition that will not turn, the steering lock explains that one in detail.

Another cause is a poor copy. A carelessly cut copy made from a worn original can be a little off, and it stresses the cylinder every time. The fix is a new key cut by code, which we describe in adding a spare or replacing every key.

It also helps to understand what the ignition is guarding. Behind the slot sits a small stack of wafers or pins, a spring loaded mechanism and a link to the steering lock and the electrical switch. Everything in there is made with tight tolerances. A key that has partly broken can leave a sharp edge that catches those parts, and a hard pull drags the edge across them. That is the reason a gentle extraction by a trained person is so much safer than a home attempt.

What not to do

In the dark, with a car that will not start, it is tempting to try something. These attempts make a bad situation worse.

Pulling the wrong way can break the cylinder, strip the small parts that hold the key in place, or even damage the wiring that tells the car a key is present. Oil in the cylinder can leave a film that traps dust and makes the next key harder to turn. Wiring tricks on a modern vehicle can set off an alarm, disable the starter or confuse the immobilizer. A calm wait costs far less than any of these.

• Do not pull on the broken piece with pliers or tweezers, because the ignition may be damaged by the force.
• Do not push another key or a tool in to jam the piece loose.
• Do not spray lubricant, penetrating oil or cleaner into the ignition slot.
• Do not apply glue, tape or any adhesive to grab the piece.
• Do not try to jump the ignition wiring or disconnect the column covers.

Older ignition, newer ignition: the difference

On an older vehicle, the key is a plain metal blade with a plastic or rubber head, and the ignition is a simple cylinder. A locksmith can often extract the blade, cut a new key from the lock code and have the car running without any programming. See keys for older vehicles from before transponder chips for how those keys are handled.

On a newer vehicle, the key contains a transponder chip, and the car will not start unless it reads that chip and finds a match. In that case the new key must be cut and then programmed to the car. If the broken head had the chip and you still have it, that can sometimes help. If you do not, the car can usually be taught a new key, but it takes the right equipment and the vehicle details. We explain the idea in transponder keys explained for night emergencies.

Some vehicles use push button starting and have no key in the ignition at all. If you have that system, a broken physical key is more likely to be the hidden emergency blade in the fob, which opens the door but does not start the car. Read push to start vehicles and lockouts and smart key replacement in plain words.

Do not assume that a key which looks the same is the same. Two keys for different trims of the same model can share a blade shape yet carry different chips, and a key for one year may not match a car from another. That is why a locksmith asks for the vehicle details and, where needed, checks them against the car itself before cutting or programming anything.

Vehicle details to gather

Key types vary by make, model and year, so the single most useful thing you can give the dispatcher is the vehicle information. Do not guess a key style from memory. Read it off the car or its papers.

Our page on preparing your vehicle information for the call goes through each item, and what to tell the dispatcher covers location. You can also use the request form if that is easier.

• Year, make, model and trim.
• Whether the key has a plain head, a plastic head with a chip, a remote head with buttons, or a flip key.
• Whether the car uses a key or a push button.
• Whether the engine is on or off, and whether the steering wheel is locked.
• Whether you have a second key somewhere and whether it works.

What a locksmith does at the car

A locksmith with a service van arrives with the tools to deal with a broken ignition key. Before touching the ignition, they confirm who you are and that the vehicle is yours, because ignition work gives control of the car.

They then look into the keyway with a light and decide how to proceed. If the blade is accessible, a thin extractor slides alongside the broken piece, hooks the cuts and draws it out. If the piece is deep, the locksmith may remove the ignition cylinder from the column, which usually involves releasing a retaining part and taking care around the steering lock. On the bench, the cylinder is opened and the piece is removed safely.

Once the fragment is out, the cylinder is checked for damage. If it is sound, it goes back and a new key is cut. If it is worn or damaged, a new cylinder may be recommended, and the new key is matched to it. Some vehicles require the key to be programmed afterward, which is where the van's key programming equipment comes in. Read about our vehicle key replacement and transponder programming services for more.

Proving ownership is part of this job, and it is meant to protect you. A new key that starts the car is the same as handing over the car, so a responsible locksmith asks for identification and a document tied to the vehicle, such as a registration. Have them ready if you can, and explain honestly if they are in the car. Our page on proof of ownership for key replacement describes what usually helps.

Can the car be driven afterward

Often, yes, but only after the new key starts the engine and everything else works as it should. Test the new key in the door, the trunk, the ignition and the remote. Turn it to the accessory position, then to on, then to start. The steering wheel should unlock when the key is turned. The dashboard lights should behave normally and no security light should stay lit.

If the ignition feels loose, gritty or stiff, say so. A worn cylinder can break a second key. If the immobilizer light is flashing, the car may not be recognizing the key, and the programming needs to be checked again. Do not drive away until the car starts and runs normally with the new key, and then ask for a spare to be made.

A tow is not always needed. A mobile locksmith works at the vehicle, which saves moving a car that cannot be started. If the car is in an unsafe spot, however, such as a road shoulder, think first about your own safety. See rural road lockouts after dark for a plan when you are waiting on a dark road.

If you are stranded in a hard place

Some breakdowns happen in the worst places. A parking area at a trailhead, a lakeside lot, a mountain pass with snow starting. Plan for the wait, not just the repair. Stay with the vehicle if it is a safe place to be, keep the doors closed, and keep your phone charged. Let someone know where you are and when you expect to be moving again.

In the cold, wear what you have, keep dry, and avoid running the engine for heat if the key cannot be turned. In the hot summer in the valley, find shade and water and avoid sitting in a closed car. Never leave a child or a pet inside a closed vehicle, and call emergency services if someone is in distress. For specific settings, see trailhead lockouts and mountain roads, cold nights and lockouts.

Think about the other people who use the car. A family vehicle may have several drivers, each with a different habit and a different bundle on the key ring. If one key has broken, agree on a plan for the others: who still has a working key, who will bring the spare, and whether the loose ignition is likely to break the next one. A short talk after the repair costs less than a repeat.

Preventing the next break

Once the car is running again, a few habits protect the new key. Remove heavy items from the key ring, or at least use a separate ring for the ignition key so the weight does not hang on the cylinder. Do not use the key to pry, scrape or open cans. Turn it gently, and if it sticks, stop rather than force it.

Look for early signs. A key that needs jiggling, a cylinder that feels rough, a steering wheel that grabs and will not release, or a key that leaves bright marks on the brass are all warnings. Our guide on worn key symptoms lists what to watch for, and when one key works and the other does not helps you tell a worn key from a worn lock.

Finally, have a spare. A second key stored at home, away from the vehicle, turns a break into an inconvenience. Our page on why a spare key matters before you need it explains how to approach it. If the first key is already worn, a new key cut from code is better than copying it.

Working with Redding Mobile Locksmith

Redding Mobile Locksmith is a 24 hour mobile locksmith serving Shasta and Siskiyou counties, with a branded team and a service van that carries key cutting and programming equipment. When a key breaks in an ignition, the visit happens where the car is, whether that is a driveway in Redding, a lot beside Interstate 5 or a street in one of the mountain towns.

The phone line is coming soon, so use the request form to send your location and vehicle details. For other night help, see the after hours emergency service and the vehicle locksmith pages, or read locked out at night, a safety first plan.

Common questions