Mobile Automotive Locksmith · Melbourne & Geelong
Transponder Car Key Replacement Melbourne
Transponder car key replacement for most makes and models across Melbourne and Geelong. We come to you.
Request a Callback
Tell us your vehicle and what has happened, and we will call you straight back.
What is a transponder car key?
A transponder car key has a small chip in the head that sends a code to your vehicle immobiliser, and the engine only starts when the car recognises that code. Replacing one means cutting a new blade to your locks and programming the transponder chip so your immobiliser accepts it, which we do at your car across Melbourne and Geelong in one visit.
If the buttons rather than the chip are the issue, that is a remote and key-fob job, and if a working key remains we can cut a paired spare or duplicate. Lost every key? See lost car keys.
A transponder key will not start the car unless the chip is programmed, which is why a plain cut copy from a shop often turns the lock but never fires the engine.


Transponder key situations we handle every week
Real calls from Melbourne and Geelong drivers. If one of these sounds like your day, we can cut a new key at your car.
Lost your only chip key
No transponder key left to copy. We cut and program a brand new chip key to your immobiliser.
Security light on, no start
The key turns but the engine will not fire and the immobiliser light flashes. We diagnose and program a key it accepts.
Worn transponder key
A chip key that needs jiggling to start. We cut a fresh key to code and pair the chip.
Second-hand car, one chip key
Bought a car with a single transponder key. We add a programmed spare before it becomes urgent.
Damaged or dead chip key
Cracked case or a chip that no longer reads. We supply and program a replacement at the car.
Extra programmed key
You want a paired backup chip key for another driver. We cut and code one on site.
Mobile Service · Melbourne & Geelong
Why choose Ostan Locksmiths?
- Fully mobile: we come to your car or motorcycle anywhere across Melbourne and Geelong
- Licensed and insured technicians you can trust with your vehicle and keys
- Fast response: tell us your location and what happened, and we head your way
- Full car key service: replacement, lost keys, spares, cutting, programming, remotes and lockouts
- Motorcycle keys cut and replaced for most makes and models
Call 0410 380 354 to tell us about your vehicle, or send the form and we will get straight back to you.
Get In Touch
Send your details and we will call you back shortly.

Which transponder keys can we replace?
Transponder keys come in several forms and each pairs to the immobiliser a different way. We carry the blanks and diagnostic gear for the common makes, so your chip key is cut and coded in one mobile visit.
- Chip in head keys with a separate metal blade
- Remote head transponder keys that lock and start
- Flip keys with a fold out blade and chip
- Proximity smart keys for push button start cars
- Laser cut sidewinder chip keys for European and newer models
How our mobile transponder key service works
- Call 0410 380 354 or send the callback form with your make, model, year and whether a key remains
- We confirm the transponder type and quote the cutting and programming
- Your locksmith drives to you, cuts the blade and programs the chip at the car
- You test the ignition, doors and buttons yourself before we pack up


Cut to code and chip paired to your immobiliser
A transponder key is only done when the chip talks to your car. We retrieve the key code from the VIN or decode it from the lock, cut the blade to that exact specification, then program the chip through the OBD port so the immobiliser accepts it as an original.
- Key code worked out from your VIN or decoded from the lock
- Blade cut to factory specification, never traced from a worn copy
- Transponder chip paired through the OBD diagnostic port
- Lost keys deleted from the immobiliser for your security
- Proof of ownership checked on every job, licence and rego
Which cars can we cut keys for?
We work with popular makes across Melbourne and Geelong, including BMW, Fiat, Ford, Holden, Hyundai, Jeep, Kia, Mazda, Mercedes, Mitsubishi and Toyota. Have these details handy when you call:
Make and model: the exact model, not just the manufacturer.
Year of manufacture: different years can use different key systems.
Current key situation: all keys lost, one working key left, a damaged key, or a faulty remote.
Location: your Melbourne or Geelong suburb and a safe place to meet.
Key photos: if a key remains, a clear photo helps.
With those details we will confirm the right service and head your way. If your make is not listed, get in touch anyway.

Cut & Programmed On Site
Brands We Service
Ostan Locksmiths cuts and programs car keys for popular makes across Melbourne and Geelong. Modern vehicles use different key systems, from transponder keys to proximity smart keys, so have your make, model and year ready when you call.
Not sure if we can help? Pick your make from the list, then call 0410 380 354 or send an enquiry. If your make is not listed, get in touch and we will let you know how we can help.
Skip the dealership for your transponder key
Most transponder keys a dealership would order in can be cut and programmed at your car.
The dealership route
- Arrange and pay for a tow to the dealership
- Wait days while a replacement key is ordered in
- Make a second trip to collect the car
The Ostan mobile way
- We drive to your car anywhere in Melbourne or Geelong
- The chip key is cut and programmed on site in one visit
- You drive away the same day, no tow, no queue
What affects the cost of a transponder car key in Melbourne?
Every transponder key is quoted on your make, model and key system, not a flat guess, because programming steps differ between cars. Tell us the details and we explain the job before we head out.
You get one clear price up front, with no call out surprises.
- Chip type: a basic transponder differs from an encrypted or smart key chip
- Key situation: copying with a working key is smaller than an all keys lost job
- Make and year: some European models need extra programming steps
- Key blank availability: common blanks travel in the van, rare ones may be ordered
- Location: the quote covers the full mobile visit to your Melbourne or Geelong suburb


What to check before you call
A few quick checks make the visit faster and keep the cost down.
- Search first: bags, pockets, the seat gap and the jacket you wore yesterday
- Note your make, model and year, and whether any key still works
- Check the old key for a bent blade, cracked case or dead buttons
- Know the suburb and the exact spot where the car is parked
- Have your rego or VIN handy for the key compatibility check
We Provide These Services In Melbourne
- Car key replacement
- Lost car key replacement
- Spare and duplicate car keys
- Combined car key cutting and programming
- Remote and key-fob replacement
- Mobile vehicle lockout assistance
- Motorcycle key replacement
- Motorcycle key cutting
Availability depends on the vehicle make, model, year and key system.
Areas We Service
Mobile transponder car key replacement across Melbourne and Geelong, from the inner city to the outer suburbs, along the M1, M80 and EastLink corridors. We come to your car with blanks and coding gear on board.
Melbourne
Car key replacement in these popular suburbs and everywhere in between.
Geelong & Bellarine
Our Geelong team covers the city, the Bellarine and the Surf Coast.
- Geelong CBD
- Geelong West
- Newtown
- Belmont
- Highton
- Lara
- Waurn Ponds
- Leopold
What drivers say
Mobile Transponder Key Replacement · Melbourne & Geelong
Need a transponder car key replaced today?
Speak directly with a mobile automotive locksmith now. We come to you anywhere in Melbourne or Geelong, cut the new key at your car and program it on the spot.
Frequently Asked Questions
For most makes and models, yes. Give us the exact make, model and year and we will confirm and bring the right chip key and programming tools.
Tell us every key is missing when you call. We can create a new key on site for most cars. Have proof of ownership ready.
Not always. The transponder chip lets the car start, while the remote buttons handle locking. Some keys combine both in one housing. We identify your exact key before making a replacement.
We are fully mobile across Melbourne and Geelong. We are a fully mobile service and do not operate a walk-in shopfront.