Guides
Rekeying vs. Replacing Your Locks: What It Costs and When Each Makes Sense
If you searched for the cost to rekey locks, here is the short version: rekeying is almost always the cheaper path, because you pay for labor and a few small parts instead of a whole new lock assembly. On a car, rekeying means the door cylinder or ignition cylinder is re-pinned to match a new key, so old keys stop working. Replacing means the cylinder or module comes out and a new one goes in. Blossom Key & Ignition quotes both options upfront before any work starts, and the work is done at your vehicle in San Jose.
What rekeying actually is
Rekeying changes the internal wafers or pins inside a lock so a different key operates it. The lock body, the housing, and the mounting all stay where they are. On vehicle door locks and ignition cylinders, this is a mechanical job done with the cylinder removed and rebuilt on the spot.
The main reason to rekey is control. A lost key, a key handed to someone you no longer trust, or a used car with unknown key history all end the same way — old keys need to stop working. Rekeying does that without touching the rest of the vehicle.
One thing to know on modern cars: rekeying the mechanical cylinder does not by itself deal with the transponder chip or remote fob. Those are programmed separately at the vehicle, and it is normal for a job to involve both.
When replacement is the better call
If the cylinder itself is worn, cracked, or damaged, rekeying just puts a new key into a failing part. Ignition cylinders that grind, stick between positions, or let the key wiggle loose are usually past the point where re-pinning helps.
Forced entry damage is the other clear case. If a lock was punched, drilled, or pried, the housing is compromised and the fix is new hardware. Same story if the cylinder has been disassembled before and parts are missing.
Replacement costs more because you are buying the part plus the labor to fit and, on many vehicles, program it. That is worth it when the alternative is doing the job twice.
What you can check yourself first
Try a spare key if you have one. If the spare turns smoothly and the primary key does not, the key is worn, not the lock — and that is a much smaller job.
Wiggle test the ignition. Insert the key and see if there is play side to side, or whether the key can be pulled part-way out while the car is running. Both point toward a worn cylinder rather than a rekey candidate.
On door locks, check whether the problem is the cylinder or the linkage. If the key turns freely but nothing happens inside the door, the issue is behind the lock, not in it. Note what you find — it speeds up the diagnosis when a tech arrives.
How pricing is quoted
Cost depends on the vehicle, how many cylinders are involved, whether a transponder or fob has to be programmed, and whether any part is being replaced. Those variables are why a flat number online rarely matches the real job.
Blossom Key & Ignition gives upfront pricing before work begins, so you know which option you are paying for and why. Same-day service is available, including weekends, and there is 24/7 emergency response if you are stranded.
FAQ
Rekeying vs. Replacing Your Locks: What It Costs and When Each Makes Sense — questions
Short answers first; call for the specifics of your situation.
Usually yes. Rekeying is mostly labor plus small internal parts, while replacement adds the cost of the new cylinder or module and the work to fit it. Both options are quoted upfront so you can compare before deciding.
Yes. Once the cylinder is re-pinned to a new key, the previous key no longer turns it. That is the whole point of rekeying after a lost key or a change of ownership.
No. The transponder chip and any remote functions are electronic and are programmed separately at the vehicle. A complete job often includes both the mechanical rekey and the programming step.
Yes. Blossom Key & Ignition works at the vehicle, so door cylinders, ignition cylinders, and key programming are handled where the car sits in San Jose.
Dispatch a tech
Car Key Replacement in San Jose
Rekeying keeps the hardware and changes what key turns it; replacing swaps the hardware itself — and on vehicles, the choice usually comes down to the condition of the cylinder.