How much does it cost to replace a car key in the UK?

Car key replacement in the UK typically costs between £80 and £500, depending on the key type. Basic metal keys cost around £20-£50; transponder keys £100-£250; remote key fobs £100-£300; and smart/keyless entry keys £200-£500 or more. An automotive locksmith is usually 40-50% cheaper than a main dealership for the same work.

Is it cheaper to get a car key replaced at a locksmith or a dealer?

A specialist auto locksmith is almost always cheaper than a main dealer - typically 40-100% less. A dealership replacement for a smart key can cost £400 or more and may take several days, while a mobile auto locksmith usually completes the same job on-site in one to two hours. Dealers may be the only option for a small number of vehicles that require proprietary manufacturer-only software to programme new keys.

How much extra does it cost if I have lost all my car keys?

Losing all keys (an all-keys-lost or AKL job) typically adds £30-£100 to the standard replacement cost, because the locksmith must retrieve key data from the VIN and reset the vehicle's immobiliser system rather than simply cloning an existing key. Total AKL costs in the UK typically range from £120 to £280 depending on the vehicle.

Do I need to go to a dealer to get a transponder key programmed?

No. A specialist auto locksmith with the right diagnostic equipment can programme transponder, remote, and most smart keys for the majority of makes and models. Only a small number of high-end or very new vehicles require proprietary dealer-only tools. Getting a quote from a reputable auto locksmith first is nearly always worth doing.

Will my insurance cover the cost of a replacement car key?

Some comprehensive car insurance policies include key replacement cover, either as standard or as an optional add-on. Check your policy schedule before paying out of pocket. Be aware that making a claim may affect your no-claims bonus, so weigh the excess and bonus impact against the replacement cost before claiming.

How much does car key programming cost in the UK?

Car key programming in the UK typically costs between £30 and £200 on top of the key blank itself, depending on the vehicle and key type. City Locksmith London charges from £85 for car key programming. Programming is included in a full replacement quote, so always ask for an all-in price before agreeing to the work.

How Much Would It Cost to Replace My Car Key in London?

Q: How long does car key replacement take?

Most car key replacements take 30 to 60 minutes once the locksmith is on-site. Smart and keyless entry keys can take up to two hours due to more complex programming. A dealership replacement often takes several days because keys must be ordered and an appointment booked. A mobile locksmith can complete most jobs the same day.

Replacing a car key in London typically costs between £80 and £500, depending on the type of key your vehicle uses. A basic metal key costs around £20-£50 with no programming needed. A transponder key runs £100-£250; a remote key fob £100-£300; and a smart or keyless entry key £200-£500 or more. Losing all your keys adds roughly £30-£100 to these figures. An automotive locksmith is typically 40-100% cheaper than a main dealership and can usually complete the job on-site the same day.

Car Key Replacement Costs by Key Type

The single biggest factor in what you will pay is the type of key your vehicle uses. The table below shows typical UK market price ranges (2026) followed by City Locksmith London’s own service prices where applicable.

Key Type	Typical UK Range	Notes
Basic metal key	£20-£50	No programming; cut only
Transponder key	£100-£250	Chip must be programmed
Remote key fob	£100-£300	Cut plus remote programming
Flip key	£120-£300	Remote plus folding blade
Smart / keyless entry	£200-£500+	Advanced programming required
All-keys-lost (any type)	Add £30-£100	Extra ECU reset work
Car key programming (City Locksmith)	From £85	Our service price, ex VAT
Car key duplication (City Locksmith)	From £109	Our service price, ex VAT

Basic Metal Keys - Do I Still Need to Pay for Programming?

Basic mechanical keys have no electronic components at all. They are found mainly in vehicles made before the mid-1990s. A locksmith can cut a replacement by code or by copying an existing key - no programming needed. Typical cost is £20-£50.

Transponder Keys - What Is the Chip For?

Introduced in the mid-1990s as an anti-theft measure, transponder keys contain a microchip that sends a coded signal to the vehicle’s immobiliser. The engine will not start if the signal is missing or wrong. The key blank must be cut and the chip programmed to match your specific vehicle’s system. Cost typically ranges from £100 to £250 with an auto locksmith.

Remote Key Fobs - Cutting Plus Programming

Remote keys combine a cut key blade with a remote control for central locking and, often, a panic alarm. Both the blade and the remote module must be set up for your vehicle. Typical cost ranges from £100 to £300. Some vehicles allow the remote to be self-programmed by the owner following a button sequence; others require specialist equipment.

Flip Keys - What Makes Them More Expensive?

A flip key (also called a folding key) is a remote fob where the blade folds inside the body when not in use. Mechanically it is similar to a remote key fob, but the folding mechanism adds to the cost of the blank. Replacement typically costs £120-£300 depending on make and model.

Smart Keys and Keyless Entry - Why Are They So Expensive?

Smart keys - also called proximity keys or keyless-go fobs - do not need to be inserted into an ignition. The vehicle detects the key’s presence and allows push-button starting. These are the most expensive to replace because they require specialist diagnostic software, often with manufacturer-level access, and the key blank itself is more costly. Replacement typically costs £200-£500 or more. Luxury brands such as BMW and Mercedes tend to be at the upper end. See our dedicated guides for BMW key replacement and Mercedes key replacement costs.

What Factors Affect the Cost?

Make and Model of Your Vehicle

Luxury marques and newer models use more complex key systems, which raises both parts and programming costs. A Ford or Vauxhall key will generally cost considerably less than a BMW or Audi equivalent. See our guides for VW key replacement and Vauxhall replacement keys for brand-specific figures.

Whether You Have a Spare Key

Having at least one working key available makes the job simpler and cheaper. The locksmith can read the existing key’s data and clone or pair a new key to it. Losing all keys requires additional steps - see below.

Where You Get the Key Replaced

Your main options are a main dealer, a specialist auto locksmith, or an online retailer plus programming. The choice you make has a significant impact on price - see the dealer vs locksmith section below.

Time of Day

Out-of-hours or emergency replacements carry higher rates. Standard daytime pricing is the lowest available. City Locksmith London operates 24/7 with no call-out fee and offers a free quote before any work begins.

Is It Cheaper to Use a Locksmith or a Dealer?

Main Dealership

The official route comes with genuine OEM parts and manufacturer-backed programming - but it is the most expensive option. Dealership prices for smart key replacement often reach £400-£600 or more. You may also need to wait several days for the key to be ordered, and in some cases the vehicle needs to be towed to the dealership if it cannot be driven.

Best for: Vehicles under warranty where the manufacturer requires dealer-only programming, or rare cases where the locksmith network does not yet support the vehicle’s key system.

Automotive Locksmith

A specialist auto locksmith in London can cut and programme most key types for considerably less than a dealership - typically 40-100% less. Mobile service means the locksmith comes to your home, workplace, or roadside location. City Locksmith London covers all Greater London postcodes, arrives in around 25 minutes, and charges no call-out fee.

Best for: Fast, cost-effective replacement for the vast majority of vehicles.

Online Retailers

Key blanks and shells are available online, but be cautious. Keys bought online sometimes have the wrong chip frequency or are already locked to another vehicle. Programming still requires specialist equipment, so factor in the cost of having a locksmith programme the key separately. The total saving compared to a locksmith doing the full job is often smaller than it first appears.

Best for: Tech-confident owners whose vehicle supports owner self-programming, or where only the plastic shell needs replacing.

What Happens If I Have Lost ALL My Keys?

Losing every key to the vehicle - an all-keys-lost or AKL job - is the most complex and costly scenario. Without any key to reference, the locksmith must:

Retrieve key data from the vehicle identification number (VIN).
Access the ECU or immobiliser control unit.
Wipe the key register (clearing any lost or stolen keys from the system).
Cut a completely new key from scratch.
Programme the new key to the reset immobiliser.

This extra work typically adds £30-£100 to the standard replacement cost. In the UK, all-keys-lost jobs generally cost between £120 and £280 depending on the vehicle type, though smart key AKL jobs can cost more. The process usually takes one to two hours on-site.

This is also why having a spare cut while you still have a working key is so worthwhile - it is far cheaper to duplicate a key than to replace from zero.

For a full explanation of the key cutting process, see our guide to car key cutting.

How Long Does Car Key Replacement Take?

Scenario	Typical Time
Basic metal key (locksmith)	15-30 minutes
Transponder key (locksmith)	30-60 minutes
Remote fob or flip key (locksmith)	45-90 minutes
Smart / keyless key (locksmith)	1-2 hours
All-keys-lost job	1-3 hours
Dealership replacement	Several days (key must be ordered)

City Locksmith London typically arrives within 25 minutes of your call and completes most replacements the same day.

Where to Get Your Car Key Replaced in London

Find Your VIN First

Your Vehicle Identification Number (VIN) is essential for producing a correctly cut key, especially if you have no spare. Where to find it:

Dashboard - Visible through the windscreen on the driver’s side
Driver’s door frame - On a sticker inside the door jamb
Engine bay - Stamped on the engine block
Insurance documents - Listed on the policy schedule
V5C logbook - Printed on the registration document

Having this ready when you call saves time and may reduce cost.

What Happens During a Mobile Car Key Replacement?

If you have never used a mobile auto locksmith before, here is what the process looks like in practice:

You call and describe the situation - The locksmith will ask for your vehicle make, model, year, and your location. Based on this, they provide a fixed quote.
The locksmith travels to you - City Locksmith London covers all Greater London postcodes and typically arrives within 25 minutes.
Ownership verification - You will be asked to show your V5C registration document and photo ID. This is a legal safeguard and a sign of a professional operator.
Key cutting - The locksmith cuts the new key blade on-site using either your existing key as a reference or VIN data if no key is available.
Programming - For transponder, remote, and smart keys, the locksmith connects diagnostic equipment to the vehicle’s OBD port and programmes the new key to the immobiliser.
Testing - The new key is tested for locking, unlocking, and starting the engine before the locksmith leaves.

The entire process normally takes between 30 and 90 minutes depending on the key type and vehicle.

How to Save Money on Car Key Replacement

Use an automotive locksmith - Rates are typically 40-50% lower than main dealers
Get multiple quotes - Prices vary between providers; a quick ring-around takes minutes
Have a spare cut now - Getting a spare at the same time as a replacement is far cheaper than losing your only key later
Check your insurance - Some motor insurance policies include key replacement cover; check before paying out of pocket. Note that claiming may affect your no-claims bonus
See our full locksmith price list for transparent pricing across all our services
Ask for an all-in quote - Make sure the quote covers cutting, programming, and any call-out before you agree to work

Common Mistakes That Increase Replacement Costs

A few avoidable errors can push the cost of car key replacement higher than it needs to be:

Waiting until you lose your only key - Replacement from zero keys is more expensive because the locksmith must obtain key data from the VIN and reset the immobiliser rather than copying an existing key. Getting a spare cut while you still have a working key saves money.
Going straight to the dealer without getting quotes - Dealership pricing is often double or more what an independent auto locksmith would charge for equivalent work.
Buying cheap key blanks online - Poor-quality blanks can damage the lock barrel or fail during programming, resulting in a wasted purchase and additional costs.
Not checking your insurance - Key replacement cover may already be included in your policy.

Brand-Specific Car Key Replacement Guides

Costs vary significantly by manufacturer. We have detailed guides for the most common makes:

Need a Car Key Replacement in London?

City Locksmith London provides competitive car key replacement across all Greater London postcodes, with 24/7 mobile auto locksmith service available at your home, workplace, or roadside. Our engineers are fully insured and DBS-checked. We charge no call-out fee and provide a free fixed quote before any work begins. See our locksmith price list for transparent pricing, or contact us to get a quote for your vehicle.