Can Car Keys Be Duplicated? Chip Keys and Fobs Explained
By Fast Locksmith Surrey · Nov 09, 2026Most car keys can be copied, but how depends on whether you've got a plain metal key, a chip key, or a proximity fob. Here's what each one actually needs.
Yes, most car keys can be duplicated, but what that involves depends entirely on what kind of key you've got. A plain metal key can be cut almost anywhere in a few minutes. A chip key or proximity fob needs cutting and programming, and that's a different job with different equipment. Check which type you have before you ask anyone to quote you a price.
What type of car key do you actually have?
There are three main types on the road around Surrey right now. Older vehicles, mostly pre-2000, use a plain metal key with no electronics in it. From the late 1990s onward, most cars switched to transponder keys, which have a small chip in the plastic head that talks to the car's immobiliser. Newer cars, especially from 2010 onward, often use proximity fobs that let you unlock and start the car without taking the key out of your pocket.
Look at the key you've got right now. If it's a flat piece of metal with nothing else on it, it's basic. If it has a plastic head and you have to put it in the ignition and turn it, it's probably a transponder key. If you press a button to unlock the door and a button on the dash to start the car, you've got a proximity fob.
Can a hardware store cut your car key?
A hardware store or key kiosk can cut the metal blade on almost any car key. What they usually can't do is programme the chip. So if you get a transponder key cut at a mall kiosk, you'll have a key that physically fits the lock and the ignition barrel but won't start the engine, because the car's computer doesn't recognise the chip. This trips people up more than anything else with car keys.
For a plain mechanical key with no chip, a hardware store copy is usually fine and costs somewhere in the $5 to $15 range. For anything with a chip or a fob, you need equipment that talks to the vehicle, which hardware stores don't carry.
How a locksmith duplicates a chip key or fob
For a transponder key, a locksmith cuts a blank to match your existing key, then uses a programming tool to write the car's security code onto the new chip. The car has to accept the new chip as a valid key before it will let it start the ignition. This is usually done at the vehicle, using a tool plugged into the OBD port under the dash.
Proximity fobs work a similar way but need the fob's internal battery and antenna working correctly, plus the right blank fob for your make and model. Fobs aren't interchangeable between brands and often not between model years either, so the locksmith needs to confirm the exact part before cutting anything. If you're after a full replacement rather than a spare, the Key Fob Replacement Surrey page covers what's involved there.
- Basic metal key. Cut only, no programming, works immediately.
- Transponder key. Cut and programmed to the car's immobiliser, usually done on site.
- Proximity fob. Cut if it has an emergency blade, programmed to the car, battery and buttons tested.
What it costs and how long it takes
A basic metal key copy takes about 10 minutes and typically runs $5 to $15. A transponder key cut and programmed as a spare usually takes 30 to 45 minutes and runs roughly $80 to $180, depending on the make and whether the car needs two working keys present to accept a new one. A proximity fob duplicate usually takes 45 minutes to an hour and runs somewhere between $150 and $350, mostly driven by the cost of the fob itself. These are typical ranges, not quotes, since the exact figure depends on your specific make, model and year. If you'd rather understand how the chip and immobiliser actually work together before booking anything, our post on why a spare transponder key sometimes won't start the car goes into that.
What can go wrong when duplicating a car key
Some vehicles need all existing keys present to programme a new one, and a few models will wipe all keys from memory if the programming step fails partway through. That's a real risk with proximity fobs especially: if something goes wrong mid-programme, you can end up with no working key at all and the car needing a tow to the dealer to reset the immobiliser. A locksmith who works on cars regularly should know which models are touchy about this and plan the job accordingly.
Corrosion is another one worth mentioning locally. Surrey gets a lot of wet weather, and fobs that live in a wet jacket pocket or a damp cup holder can develop bad contacts on the battery or buttons over a year or two. If your original fob is already acting up, it's worth sorting that before you duplicate it, since a worn original can make it harder to confirm the copy is working properly. Check Car Key Battery Replacement Surrey if the issue sounds like a battery rather than the key itself.
Is it worth getting a spare key made now?
If you've only got one working key for your car, getting a spare cut while the original still works is cheaper and faster than waiting until you lose it. It also means you're not stuck calling a Car Lockout Service Surrey or getting a tow if the only key ever gets lost, locked in, or damaged. If your ignition itself is also sticking or turning rough, that's a separate issue worth looking at through Ignition Repair & Rekey Surrey, since a worn barrel can chew up a brand new key just as fast as an old one.
If you're not sure which type of key you've got, or your original key still works but you want a proper spare made, have your registration or VIN handy and give us a call. We can tell you over the phone what the job typically involves for your make and model before anyone comes out. For more on how we work, see About.
Frequently asked questions
Can I duplicate my car key without the original?
Usually not for chip keys or fobs. The programming step needs either the original key present or the car unlocked and accessible so a locksmith can read its existing security data, so losing the only key means a different job, not a straightforward duplicate.
Will a duplicate chip key work exactly like the original?
Yes, once it's programmed correctly it works the same as the original, with no difference in starting the car or operating the alarm. The only thing that can vary is button feel or plastic quality if you're using an aftermarket blank rather than an original manufacturer part.
Do I need to bring the car for a duplicate key to be made?
For transponder keys and fobs, yes, the car needs to be present so the new key can be programmed to its immobiliser system. A basic metal key with no chip can sometimes be cut from the original alone, without the car there.
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