4Keys Locksmith
NASTF VSP · ALOA · 24/7 Dispatch

Car Key Duplication Spare Keys & Cloning, Mobile

Mobile car key duplication, cloning, and spare key cutting on-site in 15 to 60 minutes. Plain metal keys, transponder chip keys, smart proximity fobs. 2000 to 2024 vehicles. NASTF VSP authorized for European luxury cloning. The spare key pays for itself the first time you misplace your primary.

Find Your Location
4Keys mobile auto locksmith cutting and cloning a spare car key on-site

Miami-Dade License · GA Registered

Two registered entities

15,000+ jobs completed

Same Day Solutions

Rapid Mobile Dispatch

Arrival in 30 min

NASTF VSP

Vehicle Security Professional

9-sec avg phone answer

ALOA Certified

Pro Certified Technicians

25 technicians on rotation

One key away from being locked out. Make the spare now.

A spare cut while your original still works is one of the cheapest jobs we do. The same key, made after every key is gone, is one of the most expensive, because the vehicle has to be decoded and programmed from scratch instead of copied. The math is in your favor while you still have a key to copy.

See full pricingLost car key replacement
Car Key Duplication

Copy, clone, or duplicate. What the difference is.

Duplication and cloning sound the same but they are not. Duplication cuts a new physical blade that matches the original. Cloning copies the electronic transponder signal from your existing key into a new chip blank, so the new key works with your immobilizer without reprogramming the vehicle. For most spare keys, you need both: a cut blade plus a cloned chip.

Cloning is preferred over fresh programming when you have a working key, because there is no vehicle session, no risk of de-syncing the original, and no need to fetch OEM data. The new spare is effectively a twin of the original. This is also why having a spare matters: copying a key you hold is a short job, while all-keys-lost programming is a much longer and more expensive one.

If you have lost all your keys and need a new one from scratch, see Lost Car Key Replacement. If you need pairing only (no cutting), see Car Key Programming.

What We Copy

The full range of duplicatable keys

Plain metal keys

Pre-2000 vehicles, lawn equipment, motorcycle keys. Blade cut only, no chip. Cheapest option.

Transponder keys

2000 to 2018 standard transponder keys. Blade cut plus chip cloning from your original.

Remote fobs

Remote-only fobs (lock, unlock, trunk, panic) duplicated and paired to your vehicle.

Smart proximity fobs

Push-to-start PEPS fobs duplicated. Pairing via OBD-II to your vehicle's PEPS module.
How It Works

Five steps from original to spare

  1. 1

    Identify key type

    Tech verifies if the key is plain metal, transponder, or smart proximity fob.

  2. 2

    Blade cut

    Laser or sidewinder cutter copies the blade pattern from the original key to the new blank.

  3. 3

    Transponder cloning if chip key

    Cloning tool reads the original key's chip signature and writes it to the new blank.

  4. 4

    Smart fob pairing if smart key

    For proximity fobs, the new fob is paired to the PEPS module via OBD-II.

  5. 5

    Function test

    We verify the new key starts the engine, locks, unlocks, and operates the trunk if applicable.

Why 4Keys

Spare keys done the legal way

NASTF VSP authorized

Required for legal European luxury duplication.

Original key not de-synced

Cloning preserves the original key. We never overwrite or erase your primary.

Fixed phone quote

No surprise on-site charges. The price you hear is the price you pay.

Marked vehicles

Real branded vans, ALOA-certified, photo-ID technicians.

FAQ - Car Key Duplication FAQ

Got questions? We have answers. If you don't see your question below, call us anytime - we're available 24/7.

Duplication cuts a new physical key blade that matches the original. Cloning copies the electronic transponder signal from your existing key into a new key, so it works with your immobilizer without reprogramming the vehicle. We do both, often together for a complete spare.
We close the price on the phone first, and that is what you pay at the door. Three things set it: which service it really is, what hardware the job takes, and on a vehicle the make, model and year. Overnight, weekend and holiday work adds a stated surcharge, never a surprise. Everything we publish sits on one page, 4keyslocksmith.com/pricing/.
15 to 30 minutes for most plain metal and transponder keys. 30 to 60 minutes for smart proximity fobs because of cloning and pairing. Mobile, on-site, no shop drop-off needed.
Yes, that is the whole point of cloning. We copy the existing key's transponder signal onto a new chip blank, so your vehicle's immobilizer recognizes the new key as the same one. No vehicle programming, no OBD-II session, no risk of de-syncing the original key.
Yes. Cloning requires the original working key as the source. We read its transponder signature in 2 to 5 minutes, then write it to the new blank. The original key is not modified or de-activated.
Yes, and legally. European luxury spares need manufacturer security data, which is exactly what NASTF VSP authorization grants us, so the key is coded the factory way instead of gray-market cloned. We carry OEM blanks for Mercedes (W205, W206, GLC, GLE, S-Class), BMW on the F and G chassis with FEM or BDC, Audi, Porsche and Range Rover. A spare cut while your original still works is a far simpler job than an all-keys-lost visit, and the dispatcher quotes the exact total on the phone.
Because copying a key you have is a small job and replacing a key you do not is a big one. With a working key in hand the technician clones its transponder signature onto a new blank in minutes, with no vehicle session at all. Once every key is gone, the job changes completely: the vehicle has to be decoded from the VIN, the blade cut from scratch, and the immobilizer programmed, which takes longer and costs considerably more. The spare is cheap insurance against the expensive version.
No. Cloning copies an existing authorized key's signature, so the manufacturer sees one continuous key signal in its data. The vehicle warranty stays intact.
Most pre-2000 vehicles have no chip at all, so it is a plain metal blade cut and nothing else: no cloning, no programming, no vehicle session. That is the simplest and cheapest key we make. Transponders started appearing around 1995 and were widespread by the early 2000s, so cars in that overlap need the blade cut plus a cloned chip. Tell the dispatcher the year and we will tell you which one yours is.
Insured in both states. Florida operations run as Qorinca LLC, which holds Miami-Dade County locksmith license LK-094576 (Florida has no state locksmith license). Georgia issues no state locksmith license, so Georgia operations run as 4Keys Locksmith LLC, registered with the Georgia Secretary of State. ALOA-certified, NASTF VSP authorized.

Related Reading

Lost Car Key Replacement

No working key? We cut and program from VIN, no original needed.

Read guide

Car Key Programming

Pairing-only service for an existing key or new aftermarket blank.

Read guide

What Is NASTF VSP?

The industry credential we hold for European luxury key work.

Read guide
Need a different service? Browse the Auto Locksmith hub.
24/7 Live Dispatch

Want a spare? Find your location.

Pick FL or GA and we quote the exact spare key price by phone before the van leaves.

See full pricingLost car key replacementAbout 4Keys