Auto Locksmith Cosham – Car Key Replacement & Mobile Vehicle Locksmith
Portsmouth Car Keys provides a fully mobile auto locksmith service across Cosham and the surrounding area, attending drivers at their location for car key replacement, vehicle entry, and ignition work. There's usually no need for a recovery truck or a dealership appointment. We come to you with the tools and equipment needed to resolve most key problems on-site.
How quickly can an auto locksmith reach you in Cosham, and what does it cost?
Portsmouth Car Keys is a mobile auto locksmith covering Cosham (PO6), usually reaching you in around 1 hour, Mon–Sun, 8am–10pm. Lost key replacement typically costs £200–£450, spare keys £150–£290 and lockouts from £120. Every job is done at your car – home, work or roadside – with a fixed price confirmed before we start.
Last updated
| Lost key replacement | £200–£450 (average) |
|---|---|
| Spare key | £150–£290 (average) |
| Locked out entry | From £120 |
| Response time | around 1 hour |
| Hours | Mon–Sun, 8am–10pm |
Car Key Replacement Services in Cosham
Mobile Key Cutting and Programming
Portsmouth Car Keys provides mobile car key cutting and programming in Cosham, producing working replacement keys at the driver's location without a dealership visit.
Key cutting alone doesn't get a modern car started. The blade needs to match the lock, but the transponder chip inside the key also needs to be recognised by the vehicle's immobiliser before the engine will start. We carry automotive diagnostic equipment to programme compatible keys, whether through the OBD port or by accessing a security module directly, depending on the model.
For drivers without a working key, combining cutting and programming in one visit avoids arranging separate services or transporting the vehicle.
Replacement Keys for Modern Cars
Portsmouth Car Keys supplies and programmes replacement car keys for most modern vehicles in Cosham, covering transponder keys, remote flip keys, smart keys, and keyless entry systems.
Modern vehicle security systems require more than a generic key cutting machine. Proximity smart keys and encrypted transponders are common across manufacturers including Ford, Volkswagen, BMW, and Toyota. The replacement must be compatible with the vehicle's particular system.
Depending on the model, programming may involve security modules such as BMW's CAS or FEM unit. We check compatibility before starting work and explain what's involved. Having the vehicle's registration, model, and year available when you call helps us identify the likely requirements.
Roadside Car Key Replacement
Roadside car key replacement is available from Portsmouth Car Keys across Cosham, with a mobile unit attending to cut and programme a replacement key on-site.
If you've lost your keys while out or your key has stopped working, you may not need vehicle recovery. Our mobile unit carries key stock and programming tools for most popular makes, allowing us to complete many replacements where the vehicle is parked.
Call with your vehicle details and location to check same-day availability. We'll confirm whether we can work safely at the location before arranging attendance.
Lost or locked out in Cosham? Call Portsmouth Car Keys now for same-day mobile auto locksmith assistance.
Call 023 9299 0167Lost or Locked Car Keys in Cosham
Lost Key Replacement Service
Portsmouth Car Keys provides lost car key replacement in Cosham, generating and programming a new key even where no spare exists.
Losing the only key creates a technical problem beyond the inconvenience. Without a recognised transponder, the immobiliser normally prevents the engine from starting, even if the door can be opened. We resolve this by preparing a compatible key and programming it to the vehicle, including remote locking functions where supported.
Replacing the last key involves extra steps compared with making a spare, but it can usually be completed at your location. We'll explain the process and, where the system allows, discuss removing the missing key's electronic authorisation so it can no longer start the vehicle.
Vehicle Entry Without Damage
Portsmouth Car Keys uses specialist non-destructive entry tools to open locked vehicles in Cosham, with methods chosen to protect the locks, door seals, and paintwork.
Professional vehicle entry isn't about forcing a door open. Depending on the vehicle, we may use specialist lock-picking tools or suitable reach tools and protective wedges. The right method depends on the locking system, door construction, and whether deadlocking is active.
We assess the vehicle before starting rather than applying the same technique to every car. Once access is restored, you can retrieve your keys, or we can assess any replacement or programming work needed during the visit.
Emergency Lockout Assistance
Emergency lockout assistance in Cosham is provided by Portsmouth Car Keys for drivers locked out at homes, workplaces, car parks, and safe roadside locations.
A lockout can interrupt a working day or leave you unable to get home. Our mobile service brings the equipment to the vehicle, avoiding unnecessary recovery simply to retrieve keys locked inside.
When you call, tell us where the vehicle is parked and whether the keys are visible. If a child, vulnerable person, or animal is trapped and in immediate danger, contact the emergency services first.
Why Cosham Drivers Use a Mobile Auto Locksmith
Professional Locksmith Equipment
Portsmouth Car Keys uses professional automotive locksmith equipment in Cosham for vehicle entry, key cutting, transponder programming, and ignition repair across most makes and models.
Programming a transponder requires equipment that can communicate with the vehicle's security system, not just a generic fault-code reader. On many Peugeot and Citroën models, this involves the BSI module. Some Mercedes systems require specialist tools compatible with the electronic ignition switch and its security functions.
We select the procedure for the specific vehicle rather than assuming every model uses the same approach. Suitable equipment and accurate diagnosis help us complete supported jobs properly at your location, with clear advice if further work is needed.
Fast Response Across Cosham
Portsmouth Car Keys provides mobile response across Cosham, attending vehicle key emergencies at homes, workplaces, roadsides, and car parks without requiring a garage visit.
When your car is unusable, you need a realistic arrival time rather than a vague promise. We confirm availability when you call and take your location, traffic conditions, and the work required into account.
Cosham is within our regular service area, alongside nearby Hilsea and Drayton. Give us the vehicle registration and a clear description of the problem so we can prepare for the visit.
Convenient Mobile Service
The mobile auto locksmith service from Portsmouth Car Keys comes to the driver's location in Cosham, reducing the need for recovery, alternative transport, or a dealership appointment.
A car key emergency often means the vehicle cannot move. We bring cutting, programming, and entry equipment to it, whether it's on your driveway or parked at work.
You don't need to organise separate appointments for opening the car and replacing its key. Where the vehicle and security system are supported, we handle both during the same attendance.
Call Portsmouth Car Keys for professional mobile auto locksmith services across Cosham and the surrounding area. Same-day attendance available.
Call 023 9299 0167Common Car Key Problems Drivers Face in Cosham
Lost Car Keys Around Cosham
Lost car keys in Cosham can be replaced on-site by Portsmouth Car Keys, with a new key cut and programmed at the driver's location.
Discovering your key is missing when you return to the car — whether it's parked on Cosham High Street, at home or at work — is frustrating, particularly if there's no spare available. Before arranging a replacement, check whether someone can bring you a spare and whether the key may have been handed in nearby.
If a replacement is needed, we carry blanks and compatible keys for many popular makes, including Ford, Vauxhall, Nissan, Hyundai, and Kia. We'll check your vehicle details and explain the options before starting, including whether the lost key's electronic access can be removed.
Keys Locked Inside the Vehicle
Portsmouth Car Keys attends locked car callouts across Cosham, using non-destructive automotive entry methods to protect the vehicle's locks, seals, and bodywork.
A key left in a bag or boot can become inaccessible when the vehicle locks. It happens to careful drivers too, and attempting to prise the door open can turn a straightforward lockout into an expensive repair.
We assess the locking system and choose suitable entry tools. Many standard lockouts are resolved quickly, although deadlocking and more complex security systems can take longer. If the key is still working normally, you can usually continue your journey as soon as access has been restored.
Broken Car Keys
Broken car keys in Cosham can be replaced or extracted by Portsmouth Car Keys, including snapped blades inside locks or ignition barrels, with replacements supplied on-site.
A blade snapped inside a lock needs a different approach from a lost key. Automotive extraction tools allow us to remove the broken section without drilling or replacing the barrel in many cases. Once it's clear, we check the lock and prepare a replacement key, programming it where necessary.
Avoid probing the lock with improvised tools or trying to turn the remaining fragment. This can push it further inside or damage the mechanism, making extraction and repair more difficult.
Faulty Keyless Entry Systems
Portsmouth Car Keys diagnoses keyless entry problems in Cosham, including fob faults, lost synchronisation, and smart key replacement requirements across supported vehicle makes.
An unresponsive keyless system doesn't always mean the fob needs replacing. A flat fob battery, radio interference, a weak vehicle battery, or a fault in the receiver or security module can produce similar symptoms.
We investigate the cause before recommending a replacement. Systems such as Kessy and some BCM-based arrangements require vehicle-specific diagnostic procedures, while proximity keys need compatible programming equipment. Tell us whether the car still starts, whether the remote buttons work, and whether a spare behaves differently; these details help narrow down the fault.
Mobile Car Locksmith Serving Cosham
Home and Workplace Visits
Portsmouth Car Keys attends homes and workplaces across Cosham for car key replacement, spare key programming, and vehicle entry, without requiring the driver to travel.
If your key isn't working before work, you may be able to have it repaired or replaced while the car remains on your driveway. We also attend workplace car parks, subject to access and permission where required.
For spare key programming with a working original, many visits are completed within an hour, although timings depend on the vehicle. We'll confirm what you need to have ready and arrange a suitable place to work around the car.
Roadside Car Key Services
Portsmouth Car Keys provides roadside car key replacement and vehicle entry across Cosham, attending vehicles that cannot be driven because of a key fault.
A failed transponder or damaged key can leave you stranded even when the car itself is mechanically sound. We bring the diagnostic equipment and key stock needed for many common faults, so recovery isn't automatically necessary.
Your location must be safe and accessible. If the vehicle is exposed to moving traffic, it may need moving before locksmith work begins. We'll discuss this when you call.
Coverage Near the M27
Portsmouth Car Keys provides auto locksmith coverage near the M27 and A27, helping drivers with key problems at safe, accessible locations around Cosham, Portchester Road and Portchester.
We attend suitable locations near the motorway as part of our mobile service, but a live lane or exposed hard shoulder is not a safe place for key cutting or programming.
If you're stranded on the motorway, follow current breakdown safety guidance and contact the appropriate recovery or emergency service. Once the vehicle is somewhere safe, we can assess the key problem and arrange attendance.
Where we cover
- Portsmouth
- Southsea
- Cosham
- Havant
- Waterlooville
- Portchester
- Fareham
- Gosport
- Lee-on-Solent
Comes to you – no recovery truck
Fixed price before we start
Response in around 1 hour
Need a mobile auto locksmith near Cosham? Portsmouth Car Keys covers the town and neighbouring areas. Contact us today.
Call 023 9299 0167Auto Locksmith Services Available in Cosham
Spare Car Key Programming
Portsmouth Car Keys programmes spare car keys in Cosham, cutting and pairing a compatible key while a working original is still available.
Getting a spare made before you lose your only key is a practical way to avoid a future emergency. On many vehicles, having a working key simplifies the programming procedure and can reduce the overall cost.
It's particularly worthwhile if you've bought a used car that came with only one key. We check the replacement's starting and locking functions before completing the job. Keep the spare somewhere secure away from your everyday key, rather than inside the vehicle where it won't help during a lockout.
Replacement Remote Keys
Portsmouth Car Keys supplies and programmes replacement remote car keys in Cosham, covering remote flip keys, smart keys, and proximity fobs for most makes and models.
A remote that no longer unlocks the doors may have a battery or button fault, while a failed transponder can prevent the engine from starting. These functions are related but don't always fail together.
We assess the key before recommending a complete replacement. Where replacement is needed, we cut the blade and programme the immobiliser and remote functions using the appropriate procedures. We then test the key at the vehicle so you know both starting and locking work correctly.
Broken Key Extraction
Broken key extraction in Cosham is carried out by Portsmouth Car Keys using automotive extraction tools to remove snapped fragments from locks and ignition barrels.
If a key snaps in the ignition, avoid trying to start the vehicle with the remaining piece. Pliers, glue, and improvised probes can damage the internal wafers or make the fragment harder to remove.
Professional tools allow controlled extraction, although a damaged or heavily worn barrel may also need repair. Once the fragment is removed, we inspect the mechanism and supply a replacement key as required. If stiffness caused the break, addressing that underlying problem helps prevent the new blade from suffering the same damage.
Ignition Lock Repair
Ignition lock repair in Cosham is provided by Portsmouth Car Keys for worn, jammed, or damaged barrels, with replacements matched to the existing key where possible.
Ignition and key faults can produce similar symptoms, so diagnosis matters. A key that won't turn may indicate blade wear, a damaged barrel, or pressure on the steering lock. Failure to recognise a transponder may instead involve the key, reader antenna, wiring, or immobiliser electronics.
We identify the likely source before recommending repairs. Mechanical ignition work can often be completed on-site, with a replacement barrel matched to the existing key where the design allows. Electronic faults may require a different repair or programming procedure.
Areas Around Cosham We Cover
Hilsea and Drayton
Portsmouth Car Keys covers Hilsea and Drayton as part of its mobile auto locksmith service, providing car key replacement and vehicle entry throughout both areas.
Drivers here can arrange the same mobile services available in Cosham, including spare keys, lockout assistance, and broken key extraction. We attend homes, workplaces, and other suitable parking locations, from Drayton Road and Northern Road to the streets around Hilsea Lines.
When booking, provide the vehicle's exact location and any access restrictions. This helps us find you promptly and check that there's enough space to work safely.
Portchester and Farlington
Portsmouth Car Keys provides mobile auto locksmith coverage in Portchester and Farlington for lost keys, vehicle lockouts, and spare key programming.
There's no need to bring the vehicle to us. We attend your location with equipment suited to the make, model, and type of key required.
Call to check availability and describe the fault, including whether you have a working spare. We'll explain the likely next steps and confirm whether the work can be completed where the vehicle is parked.
Drivers Near the A3 and M27
Portsmouth Car Keys assists drivers near the A3 and M27 with vehicle key problems at safe, accessible locations within the Cosham service area.
If you're parked off the main carriageway and need a replacement key or vehicle entry, contact us with your location and vehicle details. A nearby business name or location pin can help us find you.
Roadside attendance depends on safety and access. Where the vehicle is in a dangerous position, recovery to a suitable location takes priority over locksmith work.
Auto Locksmith Cosham – Frequently Asked Questions
Yes, a professional auto locksmith can usually unlock a car without damage, using specialist non-destructive tools and a method suited to the vehicle.
The approach depends on the lock design, door construction, and security settings. Lock-picking tools may be appropriate on one model, while protected reach tools may suit another. Air wedges and reach rods aren't suitable for every vehicle, particularly where deadlocking prevents internal release.
We assess the car before starting and explain any complications. Attempting entry yourself with wire, screwdrivers, or unprotected wedges can damage seals, glass, and locking components, so it's best to leave the vehicle undisturbed while waiting for assistance.
Need an Auto Locksmith in Cosham?
If you're dealing with a lost key, locked keys in the car, a broken blade, or an ignition fault, Portsmouth Car Keys can help. Our mobile service covers Cosham and neighbouring areas, with cutting, programming, and vehicle entry carried out at your location wherever possible.
Have your registration and location ready when you call so we can confirm availability and advise on the next steps.
Contact Portsmouth Car Keys today for professional, same-day mobile auto locksmith assistance in Cosham.
Explore more around Cosham
Services here
Your vehicle
Get a fixed price for your Cosham job
Tell us the vehicle and where it is – we'll confirm the price before we start.
Portsmouth Car Keys
023 9299 0167Mon–Sun, 8am–10pm
Mobile service – we come to you across Portsmouth & the PO postcode area
Car keys we've made near Cosham
Land Rover Defender
Opened without damage, then the sticking door lock sorted and matched to the key.
Read the job
Ford Transit Custom
New flip key cut and programmed on the driveway – van back at work the same morning.
Read the job
Volkswagen Golf
Worn ignition barrel sorted on site – key turns smoothly again, no tow to a garage.
Read the jobWhat Cosham drivers tell us
Polite and speedy, couldn’t have asked for a better Sunday service. He made it look so easy, I have no hesitation in recommending them.
Amazing service! Very responsive to phone call, arrived in less than one hour and job done in 20 minutes. I highly recommend.
Fantastic service! I called for help when I lost my car key and the locksmith arrived quickly, was super professional, and had everything fixed in no time. Very friendly and knowledgeable. Highly recommend for anyone needing reliable and efficient locksmith services!
Thank you for doing my navara lost keys so promptly professional and fast
Very fast response, professional service. Resolved my issue, highly recommended
Awesome service after I lost my only key one evening; offered to come out, took much of the central console apart and sorted the issue in what seems like no time. Excellent skills and comms throughout; absolutely recommended! Top job!!
Excellent service for my BMW 3 series with failed manual lock that he repaired quickly, replacing worn cam. Cannot recommend too highly.
Outstanding patience and top skills lead to unlocking and providing a new key to her Kia Sportage enabling her to return home after a very traumatic previous day’s experience . I cannot praise their skills highly enough. Highly recommend this company.
Did the work at a 3rd of the price of the dealership and I’m sure to a higher quality, the work was quick and professional. Could not recommend more!
Came to Gosport at quite short notice and quickly and efficiently opened the car, cut and coded two key at a very good price. Thank You, I would definitely recommend them.
Polite and speedy, couldn’t have asked for a better Sunday service. He made it look so easy, I have no hesitation in recommending them.
Amazing service! Very responsive to phone call, arrived in less than one hour and job done in 20 minutes. I highly recommend.
Fantastic service! I called for help when I lost my car key and the locksmith arrived quickly, was super professional, and had everything fixed in no time. Very friendly and knowledgeable. Highly recommend for anyone needing reliable and efficient locksmith services!
Thank you for doing my navara lost keys so promptly professional and fast
Very fast response, professional service. Resolved my issue, highly recommended
Awesome service after I lost my only key one evening; offered to come out, took much of the central console apart and sorted the issue in what seems like no time. Excellent skills and comms throughout; absolutely recommended! Top job!!
Excellent service for my BMW 3 series with failed manual lock that he repaired quickly, replacing worn cam. Cannot recommend too highly.
Outstanding patience and top skills lead to unlocking and providing a new key to her Kia Sportage enabling her to return home after a very traumatic previous day’s experience . I cannot praise their skills highly enough. Highly recommend this company.
Did the work at a 3rd of the price of the dealership and I’m sure to a higher quality, the work was quick and professional. Could not recommend more!
Came to Gosport at quite short notice and quickly and efficiently opened the car, cut and coded two key at a very good price. Thank You, I would definitely recommend them.
Polite and speedy, couldn’t have asked for a better Sunday service. He made it look so easy, I have no hesitation in recommending them.
Amazing service! Very responsive to phone call, arrived in less than one hour and job done in 20 minutes. I highly recommend.
Fantastic service! I called for help when I lost my car key and the locksmith arrived quickly, was super professional, and had everything fixed in no time. Very friendly and knowledgeable. Highly recommend for anyone needing reliable and efficient locksmith services!
Thank you for doing my navara lost keys so promptly professional and fast
Very fast response, professional service. Resolved my issue, highly recommended
Awesome service after I lost my only key one evening; offered to come out, took much of the central console apart and sorted the issue in what seems like no time. Excellent skills and comms throughout; absolutely recommended! Top job!!
Excellent service for my BMW 3 series with failed manual lock that he repaired quickly, replacing worn cam. Cannot recommend too highly.
Outstanding patience and top skills lead to unlocking and providing a new key to her Kia Sportage enabling her to return home after a very traumatic previous day’s experience . I cannot praise their skills highly enough. Highly recommend this company.
Did the work at a 3rd of the price of the dealership and I’m sure to a higher quality, the work was quick and professional. Could not recommend more!
Came to Gosport at quite short notice and quickly and efficiently opened the car, cut and coded two key at a very good price. Thank You, I would definitely recommend them.
Polite and speedy, couldn’t have asked for a better Sunday service. He made it look so easy, I have no hesitation in recommending them.
Amazing service! Very responsive to phone call, arrived in less than one hour and job done in 20 minutes. I highly recommend.
Fantastic service! I called for help when I lost my car key and the locksmith arrived quickly, was super professional, and had everything fixed in no time. Very friendly and knowledgeable. Highly recommend for anyone needing reliable and efficient locksmith services!
Thank you for doing my navara lost keys so promptly professional and fast
Very fast response, professional service. Resolved my issue, highly recommended
Awesome service after I lost my only key one evening; offered to come out, took much of the central console apart and sorted the issue in what seems like no time. Excellent skills and comms throughout; absolutely recommended! Top job!!
Excellent service for my BMW 3 series with failed manual lock that he repaired quickly, replacing worn cam. Cannot recommend too highly.
Outstanding patience and top skills lead to unlocking and providing a new key to her Kia Sportage enabling her to return home after a very traumatic previous day’s experience . I cannot praise their skills highly enough. Highly recommend this company.
Did the work at a 3rd of the price of the dealership and I’m sure to a higher quality, the work was quick and professional. Could not recommend more!
Came to Gosport at quite short notice and quickly and efficiently opened the car, cut and coded two key at a very good price. Thank You, I would definitely recommend them.
Ready to solve your car key problem?
We're on the way. Call us now.