How Can I Get a New Key for My Car?
Lost or Broken Your Car Key? Here Is What to Do
Losing your car key is one of those inconveniences that can bring your day to a halt. Fortunately, getting a replacement is more straightforward than many people expect - and in many cases, a mobile automotive locksmith can have you back on the road within the hour.
Types of Car Keys
Understanding which type of key your vehicle uses is the first step towards getting a replacement.
Traditional Metal Keys
Found in older vehicles, these are simple cut keys with no electronic components. They are relatively inexpensive to duplicate and can usually be cut at a high-street locksmith or hardware shop.
Transponder Keys
Used in the vast majority of vehicles made after 1995, transponder keys contain a microchip that communicates with your car’s immobiliser system. The engine will only start if the chip transmits the correct code. These require specialist equipment to programme.
Remote Keys (Key Fobs)
Remote keys allow you to lock and unlock your vehicle remotely and often include a panic alarm button. They combine a cut key blade with an electronic fob and require both cutting and programming.
Smart Keys and Keyless Entry Systems
Found in newer and higher-end vehicles, smart keys allow push-button starting and proximity entry - the car detects the key in your pocket. These are the most complex and expensive to replace.
Where to Get a New Car Key
Car Dealership
The most obvious option, but typically the most expensive. Dealerships can programme keys directly to your vehicle, but costs are often significantly higher than independent alternatives.
Automotive Locksmith
A specialist automotive locksmith can cut and programme most types of car keys, often at considerably lower cost than a dealership. Many mobile locksmiths will come to your location - your home, workplace, or roadside - saving you the hassle of arranging recovery.
Online Retailers
Key shells and blank transponder keys are available online, but be cautious. Buying from unverified sources can result in incompatible or low-quality parts. Programming still requires specialist equipment, so this option rarely saves as much as it appears to.
How Much Does a New Car Key Cost?
| Key Type | Approximate Cost |
|---|---|
| Traditional metal key | From £20 |
| Transponder key | £100-£200 |
| Remote key (key fob) | £150-£300 |
| Smart key / keyless entry | £200-£400+ |
Prices vary depending on your vehicle make and model. Luxury vehicles and newer models tend to cost more due to the complexity of their key systems. For a detailed breakdown, see our locksmith price list.
How Long Does a Car Key Replacement Take?
- Traditional keys - Cut on-site in minutes
- Transponder keys - Programming typically takes 30-60 minutes; may need to be ordered in advance for some models
- Remote keys - Allow up to 24-48 hours if parts need to be sourced
- Smart keys - Can take up to a week for some manufacturers
A mobile automotive locksmith with the right equipment can often complete the job the same day.
Tips for Getting a New Car Key
- Get multiple quotes - Prices vary considerably between locksmiths and dealerships
- Have your vehicle details ready - Make, model, year, and VIN number will speed up the process
- Ask about programming fees - Some locksmiths quote for cutting only and charge separately for programming
- Consider a spare - Once you have a replacement key, getting a spare cut at the same time is far cheaper than waiting until you lose the next one
What to Do If Your Car Key Is Stolen
A stolen car key requires immediate action beyond simply getting a replacement. The risk is that whoever has the key can return and drive the vehicle away. Follow these steps:
- Call the police - Report the theft and obtain a crime reference number. Your insurer will require this.
- Contact your insurer - Notify them of the theft. Some policies include key cover that contributes towards replacement costs.
- Have the stolen key deactivated - A locksmith or dealer can programme the vehicle’s immobiliser to reject the stolen key’s transponder code, so it can no longer start the engine.
- Get a replacement key programmed - Once the old key is deactivated, a new key can be cut and coded to the vehicle.
- Consider additional security - If the theft occurred near your home, a steering wheel lock or OBD port lock adds a physical layer of protection while you assess the situation.
For emergency assistance at any hour, City Locksmith London responds across all London postcodes, typically within 25 minutes.
Keeping Your Car Key Safe - Practical Advice for London Drivers
Car key theft - including relay attacks on keyless entry systems - is a genuine concern in London. A few practical habits reduce the risk significantly:
- Store keys away from external doors and windows - Relay devices can amplify a key fob’s signal through walls if the key is within a few metres of the front door
- Use a Faraday pouch - These inexpensive signal-blocking pouches prevent relay interception entirely. Keep the key in one whenever it is not in use
- Never leave a spare key inside the vehicle - This is more common than you might think, and it is the first place a thief will look
- Be cautious at petrol stations and car parks - Do not leave keys unattended on counters or dashboards
For a full range of auto locksmith services or to discuss your vehicle’s security, call City Locksmith London.
Can You Get a Key Cut Without the Original?
Yes. Unlike key duplication (which copies an existing key), car key cutting can be performed without the original. A professional locksmith can work from:
- The Vehicle Identification Number (VIN) - found on your dashboard (visible through the windscreen), door jamb, engine bay, or insurance documents
- Decoding the lock barrel - the key profile can be read directly from the lock in some cases
This means even if you have lost every key, a qualified locksmith can produce a working replacement.
What Happens During the Key Cutting Process?
- Information gathering - The locksmith notes your vehicle’s make, model, year, and VIN
- Code retrieval - Using the VIN or by decoding the lock, the locksmith obtains the key profile
- Cutting - A specialist key cutting machine produces a new key to the exact specification
- Programming - If your vehicle uses a transponder key, the new key is programmed to the immobiliser system
The entire process typically takes 30-60 minutes on-site.
Need a Car Key Replacement in London?
City Locksmith London provides fast, professional automotive key services across the capital. We come to you, wherever you are.