The Importance of Having a Spare Car Key

A spare car key is one of those things that often doesn’t seem important until the last working key is lost, damaged or suddenly stops working.

Modern car keys are considerably more complicated than the traditional metal keys used in older vehicles. Depending on the vehicle, a key may contain a transponder chip, remote-control electronics, proximity functions or an integrated smart-key system. The mechanical key blade may only be one part of what allows you to unlock and start the vehicle.

Having a correctly cut and programmed spare gives you a backup if your everyday key is lost or damaged. More importantly, arranging a spare while you still have a working key can avoid turning a straightforward key-duplication job into an all-keys-lost situation.

Lockwise Locksmiths cuts and programs automotive keys for many makes and models from our Hillcrest workshop, as well as providing mobile automotive locksmith services throughout Brisbane Southside and Logan.

Why Should You Have a Spare Car Key?

The simplest reason is redundancy.

If you own two working keys and lose one, you still have access to the vehicle and can usually drive it.

If you own only one key and lose it, you may suddenly have:

• no way to unlock the vehicle normally;
• no authorised key to start it;
• no vehicle available to drive to a locksmith;
• a need for mobile onsite key replacement;
• an all-keys-lost programming situation; and
• potentially a much more involved job than simply arranging a spare beforehand.

The exact process varies considerably between manufacturers and security systems, but the general principle is simple:

The best time to organise a spare car key is while you still have a working one.

Is Making a Spare Car Key Easier When You Have the Original?

Often, yes.

A working key can provide a locksmith with useful information about the vehicle’s existing mechanical key and confirms that there is currently a functioning key for the vehicle.

Depending on the make, model and security system, adding another authorised key may also be different from dealing with a vehicle where every key has been lost.

However, this isn’t universal.

Some vehicles require essentially the same programming procedure regardless of whether a working key is available. Others have very different procedures for adding a key compared with an all-keys-lost situation.

That’s why we prefer to identify the vehicle before telling a customer exactly what’s involved.

Why Can All-Keys-Lost Jobs Be More Complicated?

When every key has disappeared, the locksmith has a different problem to solve.

There is no longer a working key available to copy, compare or use with the vehicle.

Depending on the vehicle, we may need to establish the correct mechanical key information, cut a new key and then carry out the appropriate immobiliser or key-programming procedure.

On some vehicles this is relatively straightforward.

On others, access to security information, immobiliser components or vehicle modules may make the process considerably more involved.

Modern automotive locksmithing isn’t simply about cutting a piece of metal that fits the ignition.

What Is a Transponder Car Key?

A transponder key contains an electronic chip that communicates with the vehicle’s immobiliser system.

The mechanical blade and transponder perform different functions.

The mechanical key operates the physical lock or ignition where applicable.

The transponder provides electronic authorisation for the vehicle to start.

This is why simply cutting a metal key that turns an ignition doesn’t necessarily produce a fully functioning car key.

If the vehicle requires a programmed transponder and the chip isn’t correctly authorised, the mechanical key may turn but the vehicle may not start.

What About Remote Car Keys?

A remote key normally combines multiple functions into one unit.

Depending on the vehicle, these can include:

Mechanical key blade – operates a physical door lock and sometimes the ignition.

Transponder chip – communicates with the immobiliser to authorise starting.

Remote-control electronics – operates functions such as remote locking and unlocking.

These systems aren’t necessarily the same thing.

A remote can sometimes have a problem while the transponder continues to start the vehicle. Likewise, a vehicle may start correctly even though the remote buttons no longer operate.

Correct diagnosis matters before replacing an entire key unnecessarily.

What Is a Smart or Proximity Key?

Many newer vehicles use proximity or smart keys rather than a conventional key inserted into the ignition.

The vehicle detects an authorised electronic key nearby and allows functions such as unlocking and push-button starting.

These keys still need to be correctly authorised to the vehicle.

Many also contain an emergency mechanical key blade, which can be important if the vehicle or key battery is flat or the electronic locking system can’t be used normally.

A spare smart key therefore needs more than just the correct-looking case. The electronics must be suitable for the vehicle, programmed correctly and, where applicable, the emergency blade needs to be cut correctly.

Is a Spare Car Key Just a Copy of My Existing Key?

Not always.

People often use the word “copy” because that’s what we’ve traditionally done with ordinary house keys.

Modern automotive keys can involve several separate processes:

Cutting the mechanical key

Preparing the correct transponder or electronic key

Programming or authorising the key to the vehicle

Programming remote functions where required

Testing mechanical and electronic operation

The exact process depends on the vehicle.

That’s why two car keys that look almost identical from the outside can be completely different electronically.

Can You Copy a Worn Car Key?

Sometimes, but simply tracing a badly worn key isn’t always the best way to make another one.

Mechanical keys wear over time. Locks and ignition components can also wear.

If generations of replacement keys have simply been duplicated from worn keys, inaccuracies can gradually be carried into later copies.

Where appropriate, an automotive locksmith may be able to determine the correct key information and produce a properly cut key rather than blindly reproducing years of wear.

This is particularly relevant to older and classic vehicles, where the key and lock may have been in service for decades.

My Car Came With Only One Key – Should I Get Another?

This is probably the most common situation where we recommend considering a spare.

Used vehicles are frequently sold with only one key.

The previous key may have been lost years ago, retained somewhere or simply never supplied to the next owner.

If your only working key disappears six months later, what could have been a planned spare-key job becomes an urgent all-keys-lost job.

Having two functioning keys gives you a backup and means you’re not entirely dependent on a single electronic device to access and operate your vehicle.

Should I Get a Spare Key for a Brand-New Car?

Even new vehicles don’t always remain a two-key vehicle forever.

Keys get lost, damaged, dropped, put through washing machines or simply disappear.

If you already have two fully functioning keys, you may decide that’s sufficient.

The important thing is knowing how many working keys you actually have.

If one disappears, arranging its replacement while the other still works can be preferable to waiting until the remaining key is also lost.

Can a Damaged Car Key Be Repaired?

Sometimes.

Not every key fault requires complete replacement.

Problems can include:

• damaged cases;
• worn buttons;
• broken key blades;
• damaged remote components;
• battery or battery-contact problems;
• transponder issues;
• water or impact damage; and
• general wear from years of use.

Whether repair is practical depends on what has actually failed.

If the electronics are still serviceable, repairing or rehousing an existing key may sometimes be an option. In other situations, a replacement key is more appropriate.

Don’t Wait Until Your Only Key Is Falling Apart

A badly damaged key deserves attention before it completely fails.

We’ve seen keys held together with tape, cases with missing sections, blades becoming loose and buttons worn through after years of use.

If that is your only key, you’re relying on a damaged component every time you need the vehicle.

Organising another key while the existing one still functions gives you a backup before the situation becomes urgent.

Are Aftermarket Car Keys Any Good?

The word aftermarket doesn’t automatically mean poor quality.

There are genuine manufacturer keys, OEM components and a wide range of aftermarket products available for different vehicles.

Quality can vary substantially.

The important considerations are whether the key or remote is correct for the vehicle, reliable, appropriately programmed and suitable for the customer’s requirements.

A very cheap key isn’t good value if the electronics are unreliable, the blade is poorly cut or it can’t be programmed correctly.

Likewise, not every customer necessarily needs the most expensive dealer-supplied option.

A specialist automotive locksmith can discuss the available options for the particular vehicle.

Do I Need to Go to the Dealer for a Spare Car Key?

For many vehicles, no.

Automotive locksmiths have specialist equipment for cutting, programming and diagnosing vehicle keys and immobiliser systems.

The exact capability depends on the manufacturer, model, year and security system, so no locksmith can reasonably claim that every vehicle is identical or that every key can be produced in exactly the same way.

Lockwise works with a broad range of vehicle key systems and can advise whether we can supply and program a spare for your particular vehicle.

Do I Need to Bring the Car to Your Workshop?

For a spare key, bringing the vehicle and working key to our Hillcrest workshop is generally the most economical option where practical.

The vehicle is still driveable, so there usually isn’t a reason for us to send a mobile locksmith to you unless that’s what the job requires.

This saves the mobile travel component of the job and allows us to carry out the work at the workshop.

For all keys lost, the situation is different.

If you can’t drive the vehicle because you’ve lost every working key, we can provide mobile automotive locksmith services for many vehicles and carry out the work onsite.

That can avoid having the vehicle towed simply to have a replacement key made.

Can You Make a Spare Without the Vehicle?

This depends on the vehicle and the type of key required.

Modern transponder, remote and smart keys often require interaction with the vehicle as part of programming or testing.

For that reason, we generally want access to the vehicle itself, not simply the existing key, when supplying and programming a complete spare.

That also allows us to test that the new key performs the required functions correctly before the job is finished.

What If My Spare Key Doesn’t Start the Car?

A key that mechanically turns the ignition but doesn’t start the vehicle may have an issue with its transponder or immobiliser authorisation.

Likewise, a remote that locks and unlocks the doors isn’t necessarily proof that its transponder is correctly programmed for starting.

Remote locking and immobiliser authorisation can be separate systems.

A proper spare should therefore be tested for all relevant functions rather than assuming that because one part works, everything works.

Should I Keep My Spare Car Key in the Car?

Generally, that defeats much of the purpose of having one.

If the vehicle becomes locked and your spare is sitting inside it, the spare doesn’t help you regain access.

Likewise, if the vehicle is stolen, you may lose both keys at once.

A spare is most useful when it is kept securely and separately from the everyday key and vehicle.

What Happens If My Car Keys Are Stolen?

This is different from simply needing another spare.

If a key has been stolen, the issue isn’t only that you’re missing a key. Someone else may possess a functioning key to your vehicle.

Depending on the vehicle, securing it may involve removing stolen electronic keys from the authorised key system, programming replacement keys and potentially addressing the mechanical locks.

Importantly, deleting an electronic key doesn’t necessarily stop its physical blade from unlocking a mechanical door lock.

We’ve covered this separately in our Car Keys Stolen? Car Lock Rekeying & Key Reprogramming Brisbane guide because it requires a different security approach from ordinary spare-key duplication.

Can Lockwise Make Spare Motorcycle Keys Too?

Yes. Automotive key technology isn’t limited to cars.

Lockwise also provides motorcycle key cutting, transponder programming and immobiliser-related services for many makes and models.

Modern motorcycles can have sophisticated immobiliser systems, while older bikes may use relatively conventional mechanical keys.

Again, arranging a spare while you still have a functioning key can prevent a much more inconvenient all-keys-lost situation later.

How Much Does a Spare Car Key Cost?

There isn’t one useful price that applies to every vehicle.

The cost can vary depending on:

• vehicle make, model and year;
• type of mechanical key;
• transponder system;
• remote or smart-key technology;
• key availability;
• programming requirements; and
• whether the work is performed at our workshop or requires mobile attendance.

A conventional transponder key for one vehicle can be a completely different job from a proximity smart key for another.

For an accurate price, call Lockwise with your vehicle’s make, model and year and we can determine what options are available.

Spare Car Keys at Our Hillcrest Workshop

Lockwise Locksmiths is a family-owned locksmith business based in Hillcrest, close to Browns Plains and Grand Plaza, servicing Brisbane Southside and Logan.

If you still have a working car key and simply want another one, bringing the vehicle to our workshop is generally the cheapest way to have a spare supplied, cut and programmed.

We work with conventional automotive keys, transponder keys, remote keys, smart keys and motorcycle keys across many makes and models.

And if you’ve already lost every key, don’t assume the vehicle automatically needs to go back to a dealer or be towed somewhere.

Call us with the make, model and year, tell us whether you have any working keys remaining, and we’ll let you know what we can do.

A spare car key is much easier to organise while it is still a spare—not after your last key disappears.

Frequently Asked Questions About Spare Car Keys

Is it worth getting a spare car key?

For most vehicles, having a second functioning key provides useful protection against losing or damaging your everyday key. It can also prevent a planned spare-key job from becoming an urgent all-keys-lost situation.

Is it cheaper to get a spare car key before I lose the original?

It often can be, particularly because a spare can be arranged at our workshop while the vehicle is still driveable. The difference varies between vehicles and key systems, so it isn’t universal.

Can a locksmith program a spare car key?

Yes. Automotive locksmiths can cut and program keys for many vehicle makes and models, including transponder, remote and smart keys.

Can you make a spare key if I only have one car key?

Yes, for many vehicles. In fact, having one working key remaining is a good time to arrange a second.

Does a spare car key need programming?

If the vehicle uses a transponder, remote or smart-key system, the appropriate electronic components will generally need to be programmed or authorised as required by that vehicle.

Can you make a car key if I’ve lost every key?

For many vehicles, yes. This is known as an all-keys-lost situation and may require a different procedure from making a spare while a working key is available.