Symptoms
- Key inserts but won't turn in either direction
- Key turns but won't come back out
- Key feels gritty or catches partway when turning
- May be worse in cold or very hot weather
Likely causes
- CommonDirty or gunked-up lock cylinderDust and old lubricant residue can build up inside the cylinder over years, especially if it's rarely used.
- CommonWorn lock cylinder pins or tumblersInternal wear can cause the mechanism to bind partway through its turn.
- PossibleDoor slightly misaligned, adding tension to the lock mechanismA door that doesn't sit perfectly can put slight pressure on the lock, causing binding.
- PossibleBent or worn keyA key that's worn down or slightly bent may partially work but bind before fully turning.
What to do
- Try gently wiggling the key while applying light rotational pressure rather than forcing it hard, which can snap the key off inside.
- Try a spray-on graphite or lock-specific lubricant into the cylinder, working the key in and out several times.
- Avoid using oil-based lubricants like WD-40 long-term, since they can attract dust and gum up the mechanism worse over time.
- Try a second, known-good key if you have a spare, to rule out a worn or bent key as the cause.
- If the key is truly stuck and won't budge, avoid forcing it and call a locksmith or roadside assistance rather than risking a broken-off key.
- Have a shop or locksmith service or replace the lock cylinder if the problem keeps recurring after cleaning and lubrication.
Tools and parts
- Graphite or lock-specific lubricant
Door lock cylinderSearch: “door lock cylinder for [year make model]”
Dry graphite lock lubricantSearch: “graphite lock lubricant”
When to call a pro
Call a locksmith rather than forcing a truly stuck key, since a broken key inside the cylinder is a much more expensive and time-consuming problem to fix.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.