Yes, in most cases a locksmith can cut and programme a replacement car key, whether you have lost it, snapped it, or just want a spare. The main exception is certain manufacturer-protected smart key systems that need factory-level authorisation. Costs and timescales shift depending on the key type, the vehicle, and whether you have lost every key or just one.
TL;DR:
- Most locksmiths can replace and program a wide range of car keys, except for manufacturer-protected smart keys requiring factory-level authorisation.
- On-site replacement typically takes 30 to 40 minutes and costs vary from lower prices for mechanical keys to higher fees for transponder and remote fob programming.
- Replacing all keys and resetting security data is more expensive and complex, especially if dealer involvement is needed for manufacturer-secure systems.
- Verify locksmith competence by checking for a SERMI reference, asking about on-vehicle programming, and requesting a detailed written quote beforehand.
- The majority of car key replacements are handled efficiently by mobile locksmiths with dealership-level tools, making dealer visits rarely necessary.
Table of Contents
- What types of car keys can a locksmith replace?
- How locksmiths make a replacement key on-site
- What does it cost and how long does it take?
- When a locksmith cannot help: dealer-only limits
- How to choose and verify a trustworthy auto locksmith
- What our mobile team does and what to expect
- The real question isn't capability, it's verification
- How to get help now
- FAQ
- Sources
What types of car keys can a locksmith replace?
Car keys fall into a handful of categories, and the type you have decides how straightforward the job is.
- Mechanical metal keys have no electronics at all, so cutting a new one is quick, cheap, and usually possible from the lock alone.
- Transponder (chip) keys need cutting plus electronic programming so the immobiliser recognises the new key.
- Remote fobs, including combined remote-and-transponder units, are usually programmable on-site with the right tools.
- Proximity or push-to-start smart keys sometimes need advanced programming and, occasionally, dealer-level software.
- Vintage, bespoke, or heavily immobiliser-locked systems often call for specialist knowledge rather than standard kit.
Most day-to-day replacements, including transponder keys and remote fobs, sit well within a mobile locksmith's normal scope. The harder cases tend to involve rare models or manufacturers who restrict programming data to their own dealer network, which is where the caveat in the opening answer comes from.
How locksmiths make a replacement key on-site
The process looks technical from the outside, but it follows a consistent sequence whether you are getting a spare cut or replacing every key you own.
- Identify the vehicle and key, using the VIN, the lock itself, or decoding information to work out which blank is needed.
- Cut the key, either by duplicating from an existing key, reading the lock mechanically, or cutting a blank to a code derived from the VIN.
- Programme the key, using an OBD port connection or a dedicated programmer to pair a fob or synchronise it with the immobiliser.
- Test the new key in the ignition, doors, and remote functions before finishing the job.
- Disable any lost or stolen keys so they can no longer start the car, which matters if a key has gone missing rather than simply broken.
AA Key Assist describes exactly this kind of mobile cutting and programming, often completed in around 30 to 40 minutes once a technician arrives. Separately, AA guidance on locked keys confirms that a locksmith can cut a new key without the original by reading the vehicle's lock or using VIN-derived data, and can disable the old key as part of the same visit.
A few things stretch the timeline: complex security systems, missing immobiliser modules, or unusual makes with limited aftermarket support for key data.
Pro Tip: Keep a note of your VIN somewhere other than your car, such as your phone or insurance documents, so you are never stuck trying to find it with no keys to hand.
What does it cost and how long does it take?
Prices vary by key type, vehicle, and circumstances, so treat any figure as a starting point rather than a fixed quote.
- Mechanical keys tend to sit at the lower end, since there is no programming involved.
- Transponder keys and remote fobs cost more because of the electronics and programming time.
- All-keys-lost situations usually cost more than replacing a single spare, since every key and the vehicle's security data need resetting.
- Call-out timing matters too: late-night or emergency visits often carry an additional fee on top of the key itself.
A mobile technician can often complete an on-site key replacement in around 30 to 40 minutes, according to AA Key Assist, though more complex jobs involving rare models or extensive reprogramming can take longer.
Some breakdown cover or motor insurance policies include a contribution towards lost or stolen key replacement, so it is worth checking your policy documents before paying out of pocket.
When a locksmith cannot help: dealer-only limits
Most jobs fall well inside a competent locksmith's capability, but a few situations genuinely need dealer or manufacturer involvement.
- Manufacturer-secure immobiliser systems that require server-side authorisation only the dealer network can access.
- ECU or security-module replacement, where factory diagnostic tools are the only route to resetting the system.
- Certain luxury or bespoke models with restricted parts or software that aftermarket tools cannot reach.
- Ask directly whether your specific make and model needs dealer authorisation before booking, so you are not caught out mid-job.
A locksmith who knows their limits will tell you upfront if your car falls into one of these categories rather than taking the job and getting stuck.
How to choose and verify a trustworthy auto locksmith
Vetting a locksmith takes a few minutes and avoids a far more stressful situation later.
- Check for a SERMI reference. SERMI is the sector's recognised framework for security-related repair information, and locksmiths who reference it are signalling they follow proper security protocols for immobiliser and key work.
- Ask about on-vehicle programming capability before they arrive, so you know whether your specific key type is within scope.
- Request a written quote that separates labour, parts, and call-out fees, since vague verbal pricing is where disputes usually start.
- Look for DBS checks and public insurance details, both reasonable things to ask about before letting someone work on your car.
- Watch for red flags: no paperwork, insistence on cash only, or reluctance to confirm your identity and ownership of the vehicle.
Pro Tip: Ask for a photo of the locksmith's van kit before they arrive. A properly equipped mobile unit carries key blanks, programmers, and diagnostic tools, not just a cutting machine.
A locksmith confident in their own work will answer these questions without hesitation.
What our mobile team does and what to expect
Our vans carry diagnostic tools built to deliver dealership-level key programming on-site, with typical arrival in 30 to 60 minutes of your call. That covers cutting, transponder and fob programming, all-keys-lost replacements, and stolen key deletion where needed.
When you call, have your vehicle's make, model, and VIN ready, along with proof of ownership and your current location. We will ask for the same details so we arrive with the right key blanks and programming equipment rather than guessing on-site.
Vehicle-specific pages, such as our Ford and Mini key replacement guides, set out what each make typically needs.
The real question isn't capability, it's verification
Most of the anxiety around "can a locksmith actually do this?" is misplaced. The technology to cut and programme the overwhelming majority of car keys sits in a well-equipped van, not just a dealership workshop. The conventional advice to "just go to the dealer to be safe" overstates how often that is actually necessary and understates how much it costs in time and towing fees for a job a mobile technician handles in under an hour.
The question worth spending your time on is not whether locksmiths can do this work, but whether the specific person showing up at your car can. That means checking for a SERMI reference, asking about on-vehicle programming before they arrive, and getting a written price breakdown rather than a vague verbal estimate. Skip that vetting and you are gambling on competence rather than capability. Do it properly and the dealer-only cases become the rare exception they actually are, not the default you plan around.
— James
How to get help now
We cut and programme most car keys on-site, usually arriving within 30 to 60 minutes of your call, without the towing or dealership wait.
Have your vehicle's make, model, VIN, proof of ownership, and current location ready when you call, it helps us bring the right blanks and tools first time. Book key programming for a lost or spare key, or get in touch through our emergency locksmith service if you are locked out right now.
FAQ
How much does it cost to get a new car key?
Costs depend on the key type and vehicle, ranging from simple mechanical cutting at the lower end to full transponder or fob programming at the higher end, with all-keys-lost jobs costing more than a single spare. If you are also in need of related services like Tyre Fitting in Melbourne, they provide expert automotive assistance that might be helpful. Our key programming service starts from £120, and remote keys start from £150.
Can a locksmith make a car door key without the original?
Yes, a locksmith can usually make a new key without the original by reading the vehicle's lock mechanism or using VIN-derived key data. According to AA guidance, this approach also allows the old key to be disabled if it was lost rather than simply broken.
Do Halfords reprogram car keys for free?
Halfords is not a service we can speak to directly, since pricing and programming availability vary by store and are set by Halfords itself. It is best to contact your local branch directly for current pricing and what key types they can work with.
How much do Timpson charge for a new car key?
Timpson pricing is not something we can confirm, as it is set independently by Timpson and varies by location and key type. Contacting a Timpson branch directly, or comparing against a mobile locksmith quote, is the most reliable way to check current pricing.
Sources
- Car key replacement with our Key Assist service | The AA
- SERMI - Security-related Repair Maintenance Information