Car Key Will Not Turn in the Ignition or Door
A key that will not turn is usually one of four things: the steering lock is loaded against the barrel, the vehicle is not fully in park, the key or the barrel has worn, or something is obstructing the mechanism. The first two cost nothing to fix. Whatever you do, stop forcing it — that is how blades snap off inside locks.
Try the free fixes first
A large proportion of these calls turn out to be one of two situations, both of which you can resolve yourself in seconds once you know about them.
Release the steering lock
If the steering wheel was turned after the engine was switched off, the lock pin can end up under load against the barrel, which physically prevents the key turning. Apply gentle pressure to the steering wheel left and right while turning the key. Gentle is the operative word — you are relieving pressure, not forcing anything.
Check the gear selector
An automatic will usually refuse to release the key, or refuse to turn, unless it is properly in Park. Move the selector firmly into Park and try again. On some vehicles it is worth moving it out and back to be certain it is fully engaged.
Check you have the right key
It sounds unlikely until it happens. Keys for similar vehicles can enter the wrong barrel far enough to feel plausible and then refuse to turn.
Look at the key itself
A visibly bent blade will not align with the wafers inside the lock. Do not try to straighten it in the lock — that is how it breaks.
Wear: the key, the barrel, or both
If the free fixes do not help, wear is the most likely cause, and working out which half has worn decides the repair.
The key blade wears down through daily use, gradually losing the precise profile the lock reads. The barrel wears too, its internal wafers losing definition over years of use in the weather. Either produces the same symptom: a key that needs jiggling, or only works at a particular angle, or works in one lock and not another.
There is a useful diagnostic you can do yourself. If you have a second key that is used less often, try that. If the spare turns cleanly and the everyday key does not, the key has worn rather than the lock. If neither turns, attention moves to the barrel.
Where the key has worn, the fix is a fresh key cut to the vehicle’s original specification rather than copied from the worn one. Copying a worn key simply reproduces the wear, which is why a copy from a key-cutting kiosk often works no better.
Obstruction and debris
Locks are open to the weather and to pockets, and things get into them.
Door barrels in particular collect grit, road salt and dirt. Ignition barrels collect debris carried in on keys. In cold weather moisture inside a lock can freeze, which is a separate problem covered in its own guide.
If a lock has become gradually stiffer over weeks rather than failing suddenly, contamination is a strong candidate. The important point is what not to use: general-purpose oil-based sprays attract more dirt and make things worse over time. A proper lock lubricant is a different product and behaves differently.
- Gradual stiffening over weeks — likely contamination or wear.
- Sudden total failure — more likely the steering lock, the selector, or a mechanical break.
- Stiff only in cold weather — moisture in the lock.
- Stiff in one door only — that barrel specifically, not the key.
Why forcing it is the expensive mistake
This is the single most useful thing in this guide. A key worked hard against a worn or obstructed barrel is exactly how keys snap, and a blade broken off inside a lock turns a modest job into an extraction job.
Worse, a fragment pushed deep into the barrel is considerably harder to remove than one still protruding, so the instinct to push harder makes the eventual repair more difficult and more expensive.
If a key has started needing persuasion, that is the point to have it looked at. The window between a key that needs jiggling and a key that breaks is usually weeks, not years.
If a key has already snapped, leave the remaining piece where it is, keep every fragment you have, and do not attempt extraction with pliers or glue. Both routinely make things worse.
When it is the ignition barrel itself
Sometimes the barrel has failed mechanically rather than simply worn. The symptoms are recognisable: the key turns but the ignition does not follow, the key turns part way and stops, or the barrel turns freely with no effect at all.
These need the barrel addressed rather than a new key, and replacing an ignition barrel usually means matching it to your existing key so you are not left carrying two different keys for one vehicle. That matching is part of doing the job properly.
On some vehicles the barrel is also tied to the immobiliser, which is why this is worth diagnosing rather than assuming. Replacing a barrel without accounting for that can leave a car that unlocks and turns and still will not start.
Key turning questions
Why does wiggling the steering wheel sometimes work?
Because the steering lock pin is under load against the barrel, and gentle movement of the wheel relieves that pressure so the mechanism can release.
It is a design feature rather than a fault. Keep the movement gentle — you are unloading the pin, not forcing the lock.
My key works in the door but not the ignition. What does that mean?
It points at the ignition barrel rather than the key, because the same blade is operating both locks successfully in one and not the other.
Check the steering lock and the gear selector first, since both stop an ignition turning while leaving the doors unaffected.
Can I use WD-40 in the lock?
Better not to. General-purpose penetrating sprays attract dirt and gum up over time, so a lock that improves briefly often ends up worse a few months later.
A dedicated lock lubricant is a different product and is designed not to hold contamination.
The key snapped off in the lock. What now?
Stop, and do not try to extract it yourself. Pliers usually push the fragment further in and glue contaminates the barrel, and both make the professional job harder.
Keep every piece you have, including the part still in your hand — the electronics in the head are often perfectly reusable.
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Key not turning?
Send the registration and say whether it fails in the door, the ignition, or both. That distinction usually identifies the cause before anyone attends.