2012 Toyota Corolla Key Replacement

The 2012–2013 Corolla uses the same key setup, so everything on this page applies to those years too. The full picture is on the Toyota Corolla key guide.

2012 Toyota Corolla: key facts

Key type: Remote-head key
Push-to-start: No
Transponder chip: G (4D-72)
Programming: OBD
All keys lost: We can originate new keys on site

GQ4-29T 4-button remote-head key on the 80-bit G chip.

What kind of key does a 2012 Corolla use?

The 2012 Corolla does not have push-to-start. It uses a remote-head key: a metal blade and a plastic head that holds the lock, unlock and panic buttons all in one piece. The key we work with on this year is the GQ4-29T, a four-button remote-head key. Inside the head is a transponder chip from the G family, the 80-bit 4D-72. Our references for that chip are transpondery.com and uhs-hardware.com.

What that means for you is simple. The blade turns the ignition, but the car also has to recognize the chip before the engine will run. A key that is only cut to shape will not start this car. That is why the copies from a hardware-store kiosk that skip the chip are a common source of calls: they look right, they may feel right in the lock, and the car still will not start.

The Corolla also has a mechanical backup key, so there is a physical key that works the lock even when the remote side of things has failed. That matters if your remote battery dies or a button wears out.

Key type: remote-head, four buttons (GQ4-29T)
Chip: G family, 4D-72, 80-bit
Ignition: turn key, not push-to-start
Programming: through the OBD port
Mechanical backup key: yes

Spare copy or all keys lost: how each one works

These are two different jobs on this car, and the difference affects how much work is involved.

A duplicate is the easier case. For this setup the original key is needed, meaning we copy from a key that still works. We cut the blade, set up a new chip and program the new key to the car. You end up with two working keys instead of one, and it is usually the more economical route compared with waiting until you have none.

All keys lost is also possible on this year. With no key to copy from, we work from the car itself: cutting a key by code or from the lock, then programming it through the OBD port. It takes more steps, but it does not mean replacing the ignition or towing the car to a dealer in every case. Programming on this year does not require NASTF SDRM credentials, so we are not held up by that step.

Tell us the year, model and where the car is parked, and whether you have any working key.
We confirm the key and chip against your VIN before cutting anything.
We cut the blade, using your original key if you have one or working from the car if you do not.
We program the transponder and remote functions through the OBD port.
We test the key in the ignition, the door lock and the remote buttons before we leave.

Locked out or need a locksmith now?

We answer around the clock, every day of the year.

Call (213) 577-1366

What affects the cost of a 2012 Corolla key?

We do not quote numbers on a web page because the job changes the price, not the badge on the trunk. These are the real factors:

Whether you have a working key. Copying from one is lighter work than starting from nothing.
How many keys you want. A second key is often easiest to do in the same visit as the first.
Whether you need the remote buttons working, or only a key that starts the car.
The condition of the old key. A cracked shell can sometimes be handled differently than a key that is lost.
Where the car is. A van visit to your location is a different job than you coming to our shop at 10740 Wilshire Blvd.

What we confirm by VIN, and what to watch for

The data we hold for the 2012 Corolla is verified: the GQ4-29T on the 80-bit G chip. Even so, we confirm by VIN before we cut or program, because a Corolla can be sold with different hardware depending on how it was built and whether an earlier owner already had a key replaced. If something on your car does not match, we would rather say so on the phone than discover it halfway through.

The problems we see on this year are the ordinary ones. The remote-head shell cracks, the rubber buttons wear through, and the remote battery runs out. Those are often repairable without making a new key at all, so tell us what is actually wrong. If a key starts the car but the remote has stopped, it may only be a battery or a worn case. If a key will not start the car, the chip is the first thing we look at.

For the wider picture, see our Toyota Corolla key pages or the main Toyota car key page.

Why call Wilshire Lock & Key for this

We have been in business since 1987, with a storefront in Westwood and mobile vans that serve 140 cities across Los Angeles and Ventura counties. When you call (213) 577-1366, you reach us, not a dispatch company that sells your job to whoever is closest. The phone is answered 24 hours a day, every day of the year. David, the owner and lead technician, oversees the work.

California requires locksmith companies to hold a BSIS LCO license, and you should ask any locksmith for that number before they start. If you want to look at other makes first, start at our car keys overview, or use the contact page to send us your year, model and VIN.

Frequently asked questions

Does a 2012 Toyota Corolla have push-to-start?

No. It uses a remote-head key that goes in the ignition and turns, with a four-button remote built into the head.

What transponder chip does a 2012 Corolla key use?

It uses the G family chip, the 80-bit 4D-72. We still confirm by VIN before programming, in case your car was built or serviced differently.

Can you make a key if I have lost every key?

Yes. All keys lost is possible on this year. We cut a key without an original and program it through the OBD port.

Do I need my original key to get a copy?

For a straight duplicate, yes, the original key is needed. If you do not have one, it becomes an all-keys-lost job, which has more steps.

Why will a cheap hardware-store copy not start my Corolla?

Because the car checks the transponder chip, not just the blade. A copy without a properly programmed chip will not start the car.

My remote stopped working but the key starts the car. What now?

Start with the remote battery. If that does not fix it, the buttons or the shell may be worn or cracked, which is a common problem on this key and often repairable.

Is there a backup mechanical key for this car?

Yes, the 2012 Corolla has a mechanical backup key, so you still have a way to work the lock if the remote side fails.

Can you come to me, or do I have to come to the shop?

Either. We have a storefront at 10740 Wilshire Blvd in Westwood and mobile vans. Call (213) 577-1366 and we will tell you which makes more sense for your situation.

We cover all these cities

Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.

Last updated 2026-10-11.