Can a Locksmith Make a Key Without the Original?

How a Locksmith Makes a Key Without the Original

There are three main routes a professional auto locksmith will use when no original key is present. Which one applies depends on the make, year, and security system of the vehicle.

Method 1: OBD Programming

The most straightforward route. The locksmith connects a professional diagnostic programmer — such as the Autel IM508 or IM608 — to the car's OBD port, typically located under the dashboard on the driver's side.

The programmer communicates with the immobiliser ECU and either reads the transponder data directly or retrieves a PIN code that allows a new key to be written. Once the data is retrieved, the programmer writes it to a new transponder chip, which is then fitted into an appropriate key blank.

This method works on the majority of mainstream UK vehicles: most Ford, Vauxhall, Toyota, Nissan, Renault (excluding some older Megane/Laguna), Hyundai, Kia, and many VW group and BMW models. The car must be accessible (interior reached via lockout entry first) for this to work.

Method 2: EEPROM Reading

Some vehicles restrict or block OBD-based key programming as a security measure. In these cases, the locksmith needs to read the security data from the EEPROM chip inside the immobiliser control unit or body control module directly.

This involves locating the module, connecting a clip reader or removing the chip temporarily, and reading its memory. The data — which may contain a PIN code, a cryptographic seed, or the transponder data itself — is then used to generate a matching key chip.

EEPROM reading is commonly needed for older Renault Megane and Laguna models, some early BMW E-series, certain Vauxhall Omega and Vectra variants, and a few other makes where the OBD route is manufacturer-restricted. It takes longer and costs more but is still done on-site in most cases.

Method 3: Lock Barrel Decoding

For the physical key blade — the part that physically turns the lock — the locksmith needs to know the correct cut pattern. If the car has a lock barrel accessible (door, ignition, or boot), this can be decoded mechanically using Lishi 2-in-1 tools.

A Lishi pick-decoder does two things at once: it picks the lock open and reads the cut depths of the internal wafers as it does so. This information is then used to cut a new blade to the correct profile on a key cutting machine. No original key needed, no key code needed from the manufacturer.

When Is It Not Possible Without the Original?

In a small number of situations, an independent locksmith genuinely cannot make a key without access to the original or to dealer-level systems. It is important to be upfront about this rather than overpromise.

Some Tesla models — Tesla uses a proprietary pairing system between key cards, fobs, and the car's software. Key replacement typically requires Tesla's own app and account access, or a visit to a Tesla service centre.
Certain Jaguar Land Rover systems — Some newer JLR platforms use security architectures that require factory-level diagnostic authorisation. An independent locksmith can handle many JLR vehicles but not all.
Vehicles with dealer-only anti-theft resets — A small number of models have had software updates that migrate key programming entirely to dealer systems. This is uncommon but increasing.

A reputable locksmith will check compatibility before attending and tell you honestly if your vehicle falls into one of these categories. RTI always confirms coverage over the phone before setting off.

A Real Example: Ford Kuga, No Original Key

A customer in Standish, near Wigan, called about a Ford Kuga — both sets of keys had been lost during a house move. The car had been sitting on the driveway for three weeks.

First step was door entry using the appropriate Lishi HU101 pick-decoder, which also gave me the blade cut pattern. With the car open, I connected the Autel IM608 to the OBD port. The Kuga uses Ford's PATS (Passive Anti-Theft System) — the IM608 retrieved the security data and presented options for programming a new key in all-keys-lost mode.

I cut a new Ford flip key blank to the decoded profile, programmed the chip in all-keys-lost mode, and verified start. The remote function was synced via the same OBD connection. Total time: approximately 75 minutes. The customer had a working key, and I recommended programming a spare that same day — which we did.

Related Guides and Services

Our lost car keys service → — RTI handles all-keys-lost jobs across the Wigan area
Our replacement car key service → — have one key but need another?
Types of car keys explained → — transponders, smart keys, basic blades
Car key replacement costs in the UK → — what to expect to pay

Common Questions Answered

Can a locksmith make a car key without the original?

Yes, in the vast majority of cases. A qualified auto locksmith can generate a new car key without the original using one of three main methods: reading the key data via the OBD port, reading the EEPROM chip in the immobiliser module directly, or decoding the lock barrel mechanically. The right method depends on the make, model, and year of the vehicle. The only situations where it is genuinely not possible are where the vehicle uses a proprietary security system that is exclusively dealer-locked — and even then, the dealer can usually help.

How does a locksmith know what key to make if there is no original?

There are two main approaches. First, the locksmith can connect to the car's OBD port and use a diagnostic programmer to read the transponder data stored in the immobiliser ECU — this tells them exactly what chip type and data the car expects. Second, for the blade profile, they can either pull the key code from the car's data (stored by some manufacturers), or decode the lock barrel mechanically to determine the correct cut pattern without a key present.

Does it cost more to make a key without the original?

Usually yes. The process takes longer, and in some cases requires additional steps like EEPROM reading or direct module access that add complexity and time. A lost-key replacement where no original exists typically costs 20 to 50 per cent more than replacing a key when a working original is present. The exact difference depends on the vehicle make and key type.

Are there any cars where a locksmith cannot make a key without the original?

A small number of vehicles use security architectures that strictly limit key programming to authorised dealers with factory-level access. Some Tesla models, certain Jaguar Land Rover systems, and a few high-end German vehicles fall into this category. For these, a dealer visit or specialist with the required authorisation is the only route. A reputable locksmith will tell you this honestly before attending rather than taking your money and failing on-site.

What is EEPROM reading and why is it used for lost keys?

EEPROM (Electrically Erasable Programmable Read-Only Memory) is a chip inside some vehicle immobiliser modules that stores the security PIN or transponder data. When OBD access is blocked or restricted, a locksmith can read this chip directly by connecting to it physically — either using a clip reader or by removing the chip temporarily. The data extracted is used to generate a matching transponder for the new key. It is a more involved process than OBD programming but achieves the same result.

How long does it take to make a key with no original present?

For most common UK makes — Ford, Vauxhall, Toyota, Nissan, Renault — the process takes 60 to 90 minutes on-site when no original is present. More complex vehicles like BMW, Audi, or those requiring EEPROM reading can take 90 minutes to 2 hours. A locksmith who quotes under 30 minutes for a no-original job on a modern car is either very optimistic or not telling you the full story.

Can a Locksmith Make a Car Key Without the Original?