A broken key is a frustrating, inconvenient event. In some cases it can be surprisingly expensive. Whether it snapped off in your front door, office, or car ignition, the situation often prompts one key question: do you need to rekey the lock afterward?
Let’s break down when rekeying is recommended, when it’s unnecessary, and how to know the difference.
What Happens When a Key Breaks?
When a key breaks in a lock, one of two things usually occurs:
1. The key snaps due to wear and tear—fatigue from years of use, exposure to weather, or metal weakness.
2. The key breaks under force or misalignment—someone tries to turn the lock too hard or the lock mechanism itself is starting to fail.
In either case, the broken portion of the key often gets lodged inside the lock cylinder. A locksmith will need to carefully extract the piece using specialized tools to avoid damaging the pins or the cylinder itself.
Does a Broken Key Compromise Your Lock?
That depends on the condition of the lock and whether any internal components were damaged during the break.
● If the key snapped off cleanly and the cylinder is undamaged, rekeying might not be needed.
● If the lock was sticking or jamming beforehand, the key break may be a symptom of an underlying problem—and rekeying (or replacing) the lock could be the safest move.
● If the key broke outside of the lock and someone still has the other piece, rekeying is often the safest choice, especially if security is a concern.
When Rekeying Makes Sense
It isn’t always necessary to rekey a lock after a key breaks off in it. Some possible reasons for having your lock rekeyed include:
1. You’re Not Sure Who Else Has a Copy
If the broken key was one of several copies it’s often a good idea to have it rekeyed. This is especially true if you’re uncertain who might have the remaining keys.
2. You Found a Damaged Lock
A key that breaks in a worn or rusty lock can indicate the cylinder is starting to fail. Rekeying (or replacing) is a proactive step to avoid future breakdowns.
3. You Suspect Someone May Try to Use the Broken Key
If you’re dealing with a security concern—such as an ex-tenant, employee, or someone with previous access—rekeying ensures they can’t use another key or duplicate.
4. You’ve Lost Track of the Key Pieces
If you’re not sure where both pieces of the broken key ended up, rekeying eliminates the risk of someone trying to use a glued or partial key to gain entry.
When Rekeying Might Not Be Necessary
Rekeying is often a relatively simple service, but in some cases, it may not be needed:
● The broken key is clearly old and worn, and no copies are in circulation.
● The lock is in excellent condition, and there’s no internal damage.
● You witnessed the break, recovered both pieces, and have full control over your keys.
In these scenarios, a professional locksmith may simply extract the broken piece, test the lock’s function, and cut a fresh copy from the remaining half (if it’s intact enough to duplicate).
What’s the Cost of Rekeying vs. Other Options?
Rekeying is typically more affordable than full replacement. The cost is determined based on a few factors.
In general:
● Rekeying a standard residential or commercial lock is less expensive than buying a new lock and having it installed.
● If multiple locks are keyed the same (i.e., all your doors use the same key), they can often be rekeyed together for convenience.
● Automotive locks are more specialized, especially if transponder keys are involved—your locksmith can help advise on the most cost-effective options.
Why Work With a Professional Locksmith?
While some DIY kits exist for rekeying, they require a working key and don’t cover complex lock systems or damage assessments. A licensed locksmith brings more than just tools—they bring experience.
Professional locksmiths will take steps to:
● Remove the broken key safely
● Inspect the lock for damage
● Advise whether rekeying or replacement is necessary
● Cut and test new keys
Let a Professional Locksmith Bring You Peace of Mind
Having a key break can be an overwhelming and worrying experience. The decision whether or not to rekey the lock can be a nerve-wracking one that professionals can help with. If there’s any doubt about your security or the lock’s performance, rekeying is a simple and affordable step to restore peace of mind.
At Action Locksmith Inc., we help homeowners, business owners, and vehicle owners regain access and stay secure. Whether your key broke in your front door or your car ignition, we’ll remove it safely, evaluate the lock, and rekey if needed—fast, clean, and hassle-free.
Contact us anytime for expert locksmith services you can trust.