Available Now For Assistance
Spare Car Key Cutting and Programming
Mobile Service Portsmouth
Most drivers don’t think about a spare car key until the original is lost. By that point, a straightforward spare key job has become a significantly more expensive lost key replacement. Portsmouth Car Keys provides mobile spare car key cutting and programming across Hampshire, attending drivers at their home, workplace, or any convenient location to produce a fully programmed working spare while the original key is still available.
200+ 5 Star Reviews | 90% Avg Same Day Service
Your Title Goes Here
“The engineer knew exactly how to get to my estate in Leigh Park without me having to explain the one-way system. That local knowledge saved us 20 minutes easy.”
Not a National Company
Real Local Professionals
No Inflated Prices
Deal Direct With Us The Technicians
[rankmath-breadcrumbs]
PORTSMOUTH AUTO LOCKSMITH
Need a Spare Car Key Made Near You in Hampshire?
If you currently have only one car key and the vehicle is parked at home or nearby, call Portsmouth Car Keys today. We carry the key stock and programming hardware for most vehicles on the road and can produce a working spare at your location the same day. Getting this done now costs considerably less than replacing a lost key later.
- Same-day mobile service across Portsmouth
- All makes and models covered
- No dealership delays or towing required
- Fully equipped vans for on-the-spot fixes
Location: Belgrave Rd, Southampton SO17 3ES
Telephone: 023 8218 2391
Email: getintouch@southamptoncarkeys.uk
Open: Mon-Fri 8:00-20:00 Sat-Sun 11:00-17:00
What Is Spare Car Key Programming?
A spare car key is not simply a copy. The blade profile needs to match the lock, but the key also needs to be electronically paired to the vehicle before it will start the engine. That pairing process is what separates a programmed spare from a cut-only key that opens the door but does nothing else.
The Difference Between a Cut Key and a Programmed Spare Key
A cut-only car key will operate the door lock but will not start the engine because the vehicle’s immobiliser requires a paired transponder chip to release the engine management system.
Every modern vehicle uses an immobiliser that reads a transponder signal from inside the key head every time the ignition is turned. A key cut to the correct blade profile but without a programmed chip will simply be ignored by the system. The engine won’t fire, and the driver is no better off than before. Programming is what makes a spare key a working spare key.
Why a Spare Key Needs to Be Paired to Your Vehicle’s Immobiliser
A spare car key must be paired to the vehicle’s immobiliser during programming so the engine control system recognises the new transponder chip as an authorised key.
The immobiliser stores a list of authorised transponder profiles. Adding a new spare key means writing a new profile to that list, a process that requires communicating with the vehicle’s security system directly. On most vehicles this happens through the OBD port. On some makes it involves specific modules including the BCM, the BSI, or on certain BMW models, the CAS or FEM unit.
LOCAL SINCE 2021
You Call.
We arrive.
You drive away.
Need help right now?
We’re on call across Portsmouth — most jobs completed within the hour.
LOCAL SINCE 2021
How Spare Car Key Cutting and Programming Works
How the Original Key Is Used to Authenticate the New Spare
When the original key is present, it is used to authenticate the new spare during programming, simplifying the process and reducing the time and cost compared to a lost key replacement.
This is the fundamental reason getting a spare made while the original exists is cheaper and faster than replacing a lost key. The existing key acts as a trusted authority within the vehicle’s security system. The new spare is introduced alongside it, the immobiliser adds the new transponder profile to its authorised list, and both keys work from that point forward.
How Long Does Spare Car Key Programming Take?
Spare car key programming typically takes between 20 and 60 minutes depending on the vehicle make, model, and key type, with most standard jobs completed well within the hour.
A basic transponder key for a common make such as a Ford, Vauxhall, or Nissan programmes quickly. Remote flip keys with synchronised locking functions take a little longer. Smart keys and proximity entry fobs for vehicles such as BMW, Land Rover, and Toyota’s recent models require additional programming steps and sit at the upper end of that window.
What Key Types Can Be Made as a Spare?
Portsmouth Car Keys produces spare keys covering all major types including transponder keys, remote flip keys, proximity smart keys, and keyless entry fobs for most vehicle makes and models.
The key type depends entirely on what the vehicle uses. Older vehicles typically use a basic transponder key with a fixed chip. More recent models use remote flip keys or full smart keys with rolling-code encryption and proximity entry. We carry stock for all of these and the programming equipment to pair them correctly across the range of makes we work on in Hampshire.
Situations We Solve
Bought Car With One Key
Just bought a car with one key? It’s common—and risky. One lost or damaged key leaves you stuck. We supply and program a spare on-site so you’re covered from day one.
Many vehicles are sold with a single key, especially from private sellers or auctions. Sorting a spare early means you’re not dealing with an emergency later. It’s a simple job now, but much more involved if that last key is lost.
- Spare key cut and programmed at your location
- Avoid costly all-keys-lost situations later
- Works exactly like your original key
- Quick turnaround with no dealership wait
Lost Main Key
Lost your main key but still have a spare? Now’s the time to replace it before you’re left with nothing. We create a new key and pair it to your vehicle on-site.
Relying on one remaining key is a risk most people don’t think about until it’s too late. Replacing the missing key now keeps things straightforward and avoids turning a minor issue into a full replacement job.
- New key cut and programmed to match your car
- Backup restored so you’re not relying on one key
- Option to remove lost key from memory if needed
- Fast, driveway service with minimal downtime
Main Key Wearing Down / Broken
Keys don’t last forever. If yours is worn, cracked, or unreliable, replacing it early saves you from a complete failure at the worst time.
Wear and tear builds up gradually—buttons stop responding, blades loosen, or the key becomes unreliable in the ignition. Catching it early means a quick replacement instead of being stranded when it finally gives out.
- Worn or damaged keys replaced on-site
- Blade and remote issues handled together
- Prevent ignition or locking problems
- New key tested before we leave
Commercial / Shared Vehicle Use
If multiple people use the same vehicle, one key isn’t enough. We supply additional keys so your team can keep moving without delays or handovers.
Shared vehicles need practical access, not workarounds. Having enough keys for drivers keeps things running smoothly and avoids delays caused by handovers, lost keys, or limited availability during busy periods.
- Multiple keys cut and programmed in one visit
- Ideal for vans, fleets, and shared vehicles
- Each key works independently and reliably
- Reduce downtime and improve access
How Much Does a Spare Car Key Cost in Hampshire?
A spare car key in Hampshire typically costs between £80 and £220 depending on the vehicle make, key type, and security system. Basic transponder keys for common makes cost less. Remote flip keys and smart keys with proximity entry require additional programming and sit at the higher end. All work is carried out at your location with no call-out fee to a workshop.
Spare Key Cost by Key Type – Transponder, Remote Flip and Smart Key
The cost of a spare car key increases with the complexity of the key type, from basic transponder keys at the lower end through to smart keys and proximity fobs that require module-level programming.
A simple transponder key for an older Citroen, Peugeot, or Nissan is the most affordable option. A remote flip key for a Ford, Vauxhall, or Volkswagen with synchronised central locking sits in the mid-range. A proximity smart key for a BMW, Land Rover, or Toyota with Kessy-based entry requires more involved programming and is priced accordingly.
Why Getting a Spare Now Costs Less Than Replacing a Lost Key Later
A spare key made while the original is present costs significantly less than a lost key replacement because the original key simplifies the programming authentication process, reducing time, complexity, and cost.
Without the original, the locksmith must access the vehicle’s immobiliser system directly to generate a new transponder profile from scratch. That process takes longer and requires more advanced tooling. The cost difference between a spare made today and a lost key replacement in an emergency is often £100 or more, and that’s before any recovery costs are considered.
Auto Locksmith vs Dealership for Spare Car Key Programming
Drivers in Hampshire have two realistic options for spare key programming. The comparison below covers what each actually involves.
|
Auto Locksmith |
Dealership |
|
|
Comes to your location |
Yes |
No |
|
Same-day service |
Yes |
Rarely |
|
Programs at your home |
Yes |
No |
|
Key types covered |
Most makes and models |
Manufacturer specific |
|
Recovery cost |
None |
May apply |
|
Cost |
£80–£220 |
£150–£400+ |
For the vast majority of vehicles driven across Hampshire, a mobile auto locksmith provides the same end result as a dealership at a lower cost, the same day, at your location.
Get a Spare Car Key Made at Your Location Today
If you’re in Hampshire and currently running on a single key, this is the right time to act. Call Portsmouth Car Keys to arrange a same-day spare key visit at your home or workplace. The process is quick, the cost is straightforward, and having a spare avoids a situation that is considerably more expensive and disruptive to resolve later.
When Should You Get a Spare Car Key Made?
After Buying a Used Car With Only One Key
Drivers who buy a used vehicle with only one key supplied are in the highest-risk group for a future lost key emergency and benefit most from getting a spare programmed immediately.
It’s one of the most common situations we encounter across Hampshire. A driver buys a second-hand Hyundai, Kia, or Mazda, receives one key, and assumes a spare can wait. A few months later the key is lost and the cost is three times what a spare would have been. Getting a spare made at the point of purchase or shortly after is the practical step most drivers delay until it’s too late.
Before a Long Journey or Holiday
Getting a spare car key made before travelling is a straightforward precaution that prevents a lost or damaged key from causing significant disruption away from home.
A key that fails or goes missing while travelling in an unfamiliar area is a more disruptive and expensive problem than one that happens locally. Having a spare in a separate bag or with a trusted contact at home means that even in a worst-case scenario, the situation has a simple resolution.
When Your Current Key Is Showing Signs of Wear
A car key that is difficult to turn, inconsistently recognised by the immobiliser, or physically damaged is approaching the point of failure and should be backed up with a spare before it stops working entirely.
Key blades wear over time, and the transponder chip inside a key head can be damaged by drops or heavy use. A key that occasionally hesitates before the engine starts is often showing early signs of transponder degradation. Getting a spare made while the original still works avoids the more complex and costly process of replacing a key that has failed completely.
Quick Facts
| Auto Locksmith | Dealership | |
| Attends your location | Yes | No |
| Same-day service | Yes | Rarely |
| Works without original key | Yes | Yes |
| Key programmed on site | Yes | No, vehicle must be delivered |
| Recovery cost | None | Often required |
| Typical cost | £150–£350 | £200–£500+ |
Ready To Solve Your Car Key Problem?
We’re on the way. Call Us Now
Can a Spare Car Key Be Made Without the Original?
A spare car key can be made without the original present, but the process becomes a lost key replacement rather than a spare key job, which takes longer and costs more because the locksmith must access the immobiliser system directly.
If the original key is no longer available, the job shifts to a full lost car key replacement. The end result is a working key, but the process is more involved and the price reflects that. Where possible, getting a spare made while the original exists is always the recommended approach. If the original is already lost, our lost car key replacement service covers this separately.
Spare Car Key Programming for Most Vehicle Makes
Ford, Vauxhall and Nissan Spare Keys
Portsmouth Car Keys produces spare car keys for Ford, Vauxhall, and Nissan vehicles across Hampshire, covering transponder keys and remote flip keys programmed at the driver’s location.
Ford’s range from the Fiesta through to the Transit includes a variety of transponder configurations, all within our standard coverage. Vauxhall’s BCM-managed system covers the Corsa, Astra, and Vivaro van range. Nissan’s Qashqai, Juke, and Micra use different transponder types by year, and our programming software accounts for these differences across the model range.
BMW, Audi and Mercedes Spare Keys
Portsmouth Car Keys programmes spare car keys for BMW, Audi, and Mercedes vehicles in Hampshire using manufacturer-compatible tools covering smart keys, remote flip keys, and proximity entry systems.
BMW spare key programming on models using the CAS or FEM module requires specific communication protocols that vary between generations. Audi’s spare key process depends on whether the immobiliser data sits in the cluster or is accessed via OBD, which varies by model. Mercedes EIS systems require careful synchronisation, and the programming approach differs between the A-Class, C-Class, and larger models.
Volkswagen, Kia, Toyota and Hyundai Spare Keys
Portsmouth Car Keys produces spare keys for Volkswagen, Kia, Toyota, and Hyundai vehicles in Hampshire, covering transponder keys and smart key systems across these manufacturers at the driver’s location.
Volkswagen Group vehicles including Seat and Skoda programme through the OBD port with compatible diagnostic software. Toyota’s recent Yaris, Corolla, and RAV4 models use Kessy-based proximity entry that requires the correct specialist equipment. Kia and Hyundai have extended their immobiliser systems significantly in recent years, and models including the Sportage and Tucson are fully within our programming coverage.
Mobile Spare Car Key Service Across Hampshire
Portsmouth, Gosport and Fareham
Portsmouth Car Keys provides mobile spare car key programming across Portsmouth, Gosport, and Fareham, attending drivers at their home or workplace for same-day key cutting and programming.
Whether you’re in Southsea, Alverstoke, or the residential streets around Fareham town centre, our mobile unit attends the vehicle directly. Spare key jobs at home are among the most efficient visits we carry out, since the original key is almost always available and the programming process is correspondingly quick.
Havant, Waterlooville and Cosham
Spare car key cutting and programming in Havant, Waterlooville, and Cosham is available from Portsmouth Car Keys, with same-day mobile attendance across all three areas.
Drivers in Bedhampton, Cowplain, or the residential streets around Cosham High Street can have a spare key made at their vehicle without any need to travel. We cover these areas as part of our regular Hampshire service area and reach them within a practical same-day window.
Portchester, Lee-on-Solent and Surrounding Areas
Portsmouth Car Keys covers Portchester, Lee-on-Solent, and the surrounding Hampshire areas for spare car key programming, attending drivers across the Gosport Peninsula and the M27 corridor.
From the waterfront in Portchester to the coastal streets of Lee-on-Solent and the connecting roads through Stubbington and Hill Head, our mobile coverage reaches drivers across the peninsula without any requirement to transport the vehicle.
Quick Facts
| Postcode | PO9 |
| Response | ~30 minutes |
| Operating hours | 24/7 / 365 |
| Call-out fee | £0 |
| Warranty |
12 months |
Your Title Goes Here
“The engineer knew exactly how to get to my estate in Leigh Park without me having to explain the one-way system. That local knowledge saved us 20 minutes easy.”
Recent Car Keys Weve Made
Coverage
AREAS WE COVER
Based in Portsmouth, serving the entire PO postcode area and beyond
Towns Served
| ➤ Portsmouth | ➤ Southsea |
| ➤ Cosham | ➤ Portchester |
| ➤ Havant | ➤ Fareham |
| ➤ Gosport | ➤ Waterlooville |
Postcodes
We cover the entire south coast including Southampton and Bournemouth
FAQ
Everything Portsmouth drivers ask us.
Can’t see your question? Call us on 02392990167 — we genuinely don’t mind explaining the job before you commit.
Cant see your question? Give Us A Call
02392990167
Can a spare car key be made without the original?
A spare key can be produced without the original present, but the process becomes a full lost key replacement which takes longer and costs more than standard spare key programming.
Without the original key, the locksmith cannot use it to authenticate the new spare through the vehicle's security system. Instead, the immobiliser must be accessed directly to generate a new transponder profile. This is the same process used for lost key replacement, and it is priced accordingly. If you still have the original, now is the time to get the spare made.
How much does a spare car key cost?
A spare car key in Hampshire typically costs between £95 and £500 depending on the vehicle make, key type, and whether remote or smart key functions need to be programmed alongside the transponder.
Basic transponder keys for common makes sit at the lower end of this range. Remote flip keys with central locking synchronisation fall in the mid-range. Smart keys and proximity entry fobs for prestige or recent models require more advanced programming and are priced at the higher end. We provide a clear quote before any work begins.
Can a locksmith make a spare key at my home?
Yes, Portsmouth Car Keys attends the driver's home anywhere in Hampshire to produce a spare car key, carrying all the key cutting and programming equipment needed to complete the job on-site.
There is no need to travel to a workshop or arrange a dealership visit. We come to the vehicle, carry out the key cutting and programming at the location, and the driver has a fully working spare within the visit. Most home spare key visits are completed in under an hour.
Will a spare key work with my remote locking and keyless entry?
Yes, a properly programmed spare key will include synchronisation of the remote locking functions and, on vehicles with keyless entry, the proximity entry system will also be configured.
The spare key is programmed to fully match the original in terms of what it can do. For vehicles with remote central locking, the fob signal is paired to the vehicle's receiver during the programming visit. On smart key vehicles with proximity entry, the full keyless entry function is also set up, so the spare operates exactly as the original does.
How long does spare car key programming take?
Spare car key programming typically takes between 20 and 60 minutes depending on the vehicle make, model, and key type, with most standard jobs completed within the hour.
Straightforward transponder keys for common makes complete at the faster end. Remote flip keys with locking synchronisation take a little longer. Smart keys for premium brands requiring module-level communication sit at the upper end of the range. We confirm the expected timeframe when booking so the driver knows what to plan for.
Vehicle Entry
Fast, damage-free vehicle entry to get you back inside and on the road without delay.
Car Key Cutting
Accurate car key cutting service for a wide range of makes and models at your location.
Lost Car Key Replacement
Fast, damage-free vehicle entry to get you back inside and on the road without delay.
Car Key Programming
Professional key programming to ensure your new or existing keys work perfectly with your car.
Spare Car Keys
Convenient spare car keys cut and programmed at your location to avoid future lockouts.
Diagnostics
Advanced diagnostics to identify and resolve faults with keys, immobilisers, and vehicle systems.
Ignition Lock Repair & Replacement
Ignition faults repaired or replaced to restore smooth starting and reliable vehicle use.
Car Locksmith
Mobile car locksmith service covering all lock and key issues wherever you are.
Who We Are
Same Day Service
All Makes And Models
Iron Clad Warranty
More Cost Effective Than Dealer
Get a Spare Car Key Programmed Today Across Portsmouth
If you’re running on a single key anywhere in Hampshire, Portsmouth Car Keys can have a spare cut and programmed at your location the same day. We cover Portsmouth, Gosport, Fareham, Havant, Waterlooville, Cosham, Portchester, Lee-on-Solent, and the surrounding area.
Call Portsmouth Car Keys today to get your spare car key made before you need it.
Locked Out Vehicle Entry
Mon – Fri 9am – 5pm
* Price increase for out of hours
From £120