There are five main ways to get a replacement car key in the UK: a mobile auto locksmith, your main dealership, a high-street car key service, a breakdown or Key Assist provider, or ordering a key online and having it professionally cut and programmed. For most drivers, a mobile auto locksmith is the fastest and most cost-effective route, because they come to you and can both cut and programme the key on the spot.
The right choice, though, depends on your situation. If you still have a working key, a simple duplicate is cheaper than a full replacement. If every key is lost, or the car can’t be moved, a mobile service will usually get you back on the road quickest. And if your key was stolen rather than lost, you may also need the missing key disabled so it can no longer start the car, not just a new one cut.
The type of key matters too. A basic key, a transponder key, a remote fob and a smart keyless system each call for different equipment and programming, which is why the cheapest-looking option isn’t always the one that actually works for your vehicle.
Below, we compare all five routes, show which one tends to suit which situation, and explain exactly what to check before you pay, so you don’t spend more than you need to, or end up with a key that’s been cut but never programmed.
Before you order anything, rule out the quick fixes. Do you have a spare key at home, or with someone who can bring it to you? Could the key be locked inside the car, where a lockout service is all you need? And was the key genuinely lost, or stolen? If it was stolen, ask your provider to disable the missing key as well as cut a new one, so it can no longer unlock or start your vehicle.
It also pays to have your details ready before you call. Whoever replaces your key will usually ask for your car’s make, model, year, registration and VIN, plus proof of identity and ownership. Having these to hand speeds up every one of the options below, and in a lost-key situation, it’s often what lets a locksmith cut a key without the original.
Ways You Can Get Your Car Key Replaced
Mobile auto locksmith
For most drivers, this is the quickest and most affordable route. A mobile auto locksmith comes to your home, workplace or roadside, and carries the equipment to cut and programme a key on the spot, often within the hour, with no need to tow the car anywhere. They can handle nearly all makes and key types, from transponder keys to remote fobs and smart keyless systems.
It’s also the most complete option when things have gone wrong. A locksmith can replace lost keys, open a locked car, repair a damaged fob, and delete an old transponder key from the car’s system so a lost or stolen one no longer works. If all your keys are gone, this is usually where you’ll get back on the road fastest. Our London team does exactly this, and canprogramme the new key to your vehicle before leaving.
Main dealership
Going through a franchised dealership gets you a genuine manufacturer (OEM) key, which some drivers prefer. The trade-off is cost and speed: dealerships are often the most expensive route, they can’t come to you, and they may need to order the key blank in, occasionally leaving you waiting several days before the car can be programmed.
It’s the right call in specific cases: a rare or high-end model, an unusual key system that independents don’t yet support, or a situation where only an OEM part will do. For an everyday car, though, you’ll usually get the same working key faster and cheaper elsewhere, which is partly why many dealerships quietly use auto locksmiths themselves.
High-street car key service
High-street services such as Timpson can be a good fit when you still have a working key and simply want a spare or duplicate. Depending on the branch and your vehicle, many can now cut and programme remotes and fobs, not just basic mechanical keys, though you’ll generally need to bring the car to the shop.
Where they’re less suited is the all-keys-lost scenario, or a car that can’t be moved. Availability also varies by model and location, so it’s worth calling ahead to confirm they can handle your exact key before making the trip.
Breakdown or Key Assist provider
Roadside and breakdown providers are a genuine replacement route, not just a way to pay for one. The AA’s Key Assist, for example, is a one-off service open to non-members too: a mobile technician comes to you and can cut and programme a replacement, or get you back into a locked car. Behind the scenes, this work is typically carried out by an approved auto locksmith working under the provider’s banner.
It’s worth knowing what you’re buying, though. This kind of service is usually chargeable as a separate call-out rather than included in standard membership, and availability can depend on your location, vehicle and the key you need. In practice, you’re getting locksmith-grade work, sometimes at a premium for the brand and the booking convenience.
Buy a key online and arrange professional cutting and programming
Ordering a key online can save money, but only if you go in with your eyes open. A key on its own won’t start your car: most modern keys still need cutting to your lock and programming to your car’s immobiliser, and the wrong part number, frequency or transponder simply won’t work. Buying a “cheap key” that can’t be programmed is one of the most common ways drivers end up paying twice.
If you do go this route, check compatibility carefully, confirm whether the key is brand-new or previously locked to another car, and line up a professional to cut and programme it before you buy. And don’t assume you can programme it yourself – genuine DIY programming only works on a limited set of older vehicles, and most cars need specialist diagnostic equipment.
Before you pay: will insurance or key cover help?
Insurance sits slightly apart from the five routes above, because it doesn’t replace the key itself, it may just help cover the cost. Some car insurance policies include key cover, and others offer it as a paid add-on or standalone product; a few only reimburse you after you’ve arranged and paid for the work yourself. Providers almost always send a specialist auto locksmith to do the actual job.
So it’s worth a quick check before you pay out of pocket. Look at whether your policy or a separate key cover product applies to your situation, bearing in mind that claiming can affect your no-claims bonus, and that lost keys and stolen keys are sometimes treated differently in the small print.
Which option is right for you?
The five ways aren’t really competing, each suits a different situation. This is the quickest way to match your circumstances to the sensible route:
Your situation
Option that usually fits best
You still have a working key
Duplicate at a locksmith or a compatible high-street service
All keys lost, car can’t be moved
Mobile auto locksmith, or a suitable Key Assist service
Key locked inside the car
Car opening service first – you may not need a new key at all
Key damaged but still working
Check whether a repair is enough before replacing
Key stolen
Replace it and have the missing key disabled
You need a genuine OEM key
Main dealership
You have a key cover policy
Check what it pays before booking anything
You’ve bought a key online
Confirm a professional will cut and programme it
If you’re unsure, the safest default is a mobile auto locksmith – they cover the widest range of situations, and if a repair or duplicate turns out to be all you need, a good one will tell you rather than upsell you a full replacement.
Yes, in most cases. A qualified auto locksmith can read the key information from your vehicle's lock or via its systems and cut and programme a new key without the original - which is exactly what happens in an all-keys-lost situation.
Usually, yes. Auto locksmiths tend to be significantly cheaper than dealerships because they work mobile, without the same overheads, and because they can programme keys on-site rather than ordering parts in. Many dealerships and breakdown services actually use locksmiths behind the scenes.
Once the locksmith is with the vehicle, cutting and programming often takes around 30-60 minutes, although the exact time depends on the vehicle and key type.
Rarely, for modern cars. Some older vehicles allow limited self-programming, but most need a cut blade, a matching transponder and specialist equipment to pair the key to the immobiliser. A key bought online but never programmed won't start the car.
Sometimes. It depends on your policy and whether you have key cover, which is often a separate add-on. Check the terms before assuming you're covered, and weigh any claim against your no-claims bonus.
Get a replacement car key in London
Need it sorted today? UK Auto Locksmith provides mobile car key cutting and programming across London, with a typical response time of around 30 minutes depending on location and traffic.
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