Subaru WRX & BRZ Key Replacement in Plano

These two cars sit in the same showroom and share a badge, and almost nothing about their key systems is the same. The WRX is a Subaru through and through. The BRZ is a joint program with Toyota, and its immobilizer follows Toyota logic rather than Subaru logic. That single fact changes which equipment is required, how long the job takes, and what it costs. Owners are frequently quoted a Subaru price for a car that behaves like a Toyota, or the other way around. For mobile WRX and BRZ key service in Plano, call or text (945) 307-3827.

Quick Answer

As of August 2026, a spare key for a Subaru WRX or BRZ in Plano runs roughly $240 to $440 when one key still works, completed in under an hour on-site. All keys lost runs roughly $400 to $700 and takes one to two hours, because the mechanical blade has to be cut from the vehicle key code and the immobilizer registry rebuilt from nothing.

WRX and BRZ Key Pricing in Plano

Situation	Typical Plano range (Aug 2026)	On-site time
Spare push-button smart key, WRX (2022-2026)	$280 – $440	30 – 55 min
Spare bladed transponder key, WRX (2015-2021 base)	$200 – $350	25 – 45 min
Spare smart key, BRZ (2022-2026)	$260 – $430	30 – 55 min
Spare key, BRZ (2013-2020)	$210 – $370	25 – 50 min
All keys lost, smart key trims	$450 – $700	60 – 120 min
All keys lost, bladed trims	$340 – $560	45 – 100 min
After-hours response	surcharge applies	—

Ranges only. Trim and model year decide the key type, and a technician confirms against the VIN before cutting.

The BRZ Is Not a Subaru, Electronically

This is the most useful thing on the page for BRZ owners.

The BRZ was developed jointly with Toyota, which sells the same car as the GR86 and previously as the Scion FR-S. The chassis is Subaru's. The immobilizer and key architecture follow Toyota conventions, including Toyota's approach to key registration and its security timing on all-keys-lost jobs.

Practically, that means two things. First, a shop that is set up for Subaru but not Toyota may struggle with a BRZ even though the badge says Subaru. Second, the BRZ inherits Toyota's registered-key ceiling — Toyota platforms cap how many keys a vehicle will hold at once, and a car that has accumulated fobs over the years can refuse a new one until the list is cleared. We cover that behavior in the Toyota and Lexus maximum registered key limit, and it applies to the BRZ as directly as it does to a Camry.

If you own a BRZ and a shop quotes you without asking which generation you have, that is a sign they have not thought about the Toyota side.

How the WRX Immobilizer Works by Generation

WRX (2015-2021, VA chassis)

Base and Premium trims commonly used a bladed transponder key that goes into an ignition cylinder. Limited trims and cars optioned with keyless access used a proximity smart key with push-button start. This is the generation with the widest spread in replacement cost, purely because of that split.

WRX (2022-2026, VB chassis)

The redesign moved to the Subaru Global Platform and standardized proximity keyless across most of the range. The fob changed, and a VA-generation fob will not work on a VB car. Programming is well supported by current diagnostic equipment, but with no working key the security access step on the Global Platform is a genuine part of the procedure rather than a formality — the same step that makes Subaru Outback and Legacy all-keys-lost jobs slower than their predecessors.

STI (through 2021)

The STI shares immobilizer architecture with the WRX trim it is based on. There is no performance surcharge that makes sense from a programming standpoint. If a quote is higher for an STI than for a comparably equipped WRX of the same year, ask what the difference is.

Spare vs All Keys Lost

The cost gap is the same story on every make, and it is worth understanding once.

With a working key present, the vehicle already trusts a key. The session extends that trust. The blade can be duplicated. Your existing key keeps working, and the whole job is usually done in well under an hour.

With no working key, three separate things get harder at once. The blade has to be generated from the vehicle key code rather than copied. The immobilizer registry has to be rebuilt from the vehicle side. And the security access required to do that on modern Subaru and Toyota platforms is a real timed step. Every previously registered key is invalidated as part of the process — intentionally, so a fob that disappeared somewhere in Plano cannot start the car if someone else finds it.

Common WRX and BRZ Key Problems We See

The car unlocks but will not start

The remote and the immobilizer are independent systems in the same fob housing. When one works and the other does not, you get exactly this. It is a diagnostic problem, not a battery problem, and pressing the fob against the start button is a workaround rather than a fix.

A new coin cell dies within a few weeks

That points at continuous current draw. A fob that has taken water — and on an enthusiast car that often means a track day or a car wash — keeps a circuit awake even when idle. The diagnosis is covered under key fob battery keeps dying.

The immobilizer light stays on with a bladed key

On WRX trims with an ignition cylinder, a solid or blinking immobilizer indicator in the run position means the transponder is not being read. Sometimes the chip has failed. Sometimes the antenna ring around the cylinder has. Those are different repairs at different prices, and the point of the diagnostic step is to know which before spending money.

An aftermarket or used fob will not register

WRX and BRZ fobs are commonly sold used on enthusiast forums and marketplaces. A previously registered fob may be locked to its old vehicle. Frequency and part number changed at each generation break. Confirm the part number before buying — this is the single most common wasted purchase in this segment.

A modified car adds variables

Aftermarket alarms, remote starters, and immobilizer bypass modules are common on both platforms. If something has been spliced into the ignition or immobilizer circuit, that has to be identified before key work begins, because a bypass module can make a correctly programmed key look like a failure. Tell the technician about any aftermarket electronics when you call.

The Dealership Comparison

A Subaru dealership can make you a WRX key and a Toyota dealership can help with a BRZ, but both paths generally require the car to be there. With all keys lost, that means a tow from wherever the car is sitting, which is a cost most phone quotes leave out. Fob stock varies and a part order adds days.

A mobile technician comes to the car, which removes the tow and usually the wait. Neither the WRX nor the BRZ falls into the small category of vehicles that require manufacturer-side authorization, so there is no technical reason the work cannot happen in your driveway.

What a Mobile Visit Involves

Verification first: registration or title in your name plus a matching photo ID, checked against the VIN on the car. This is standard and no legitimate shop skips it.

Then the VIN determines the key code and the correct fob for your generation. The blade is cut on-site, duplicated from a working key or cut from code if there is nothing to copy. The programming session runs through the diagnostic port. Testing follows: start the engine, cycle the locks, confirm proximity detection if equipped, and verify the key still works cold after the car has been shut down and left alone for several minutes.

Service Area

Mobile Subaru key service covers Plano 75023, 75024, 75025, 75074, 75075, and 75093, plus Frisco, McKinney, Allen, Richardson, Garland, and the surrounding Collin County area. For the general process, see car key fob programming in Plano.

Frequently Asked Questions

How much does a Subaru WRX key cost in Plano?

As of August 2026, roughly $280 to $440 for a spare smart key and $200 to $350 for a bladed transponder key while one key still works. All keys lost runs $450 to $700 for smart-key trims and $340 to $560 for bladed trims.

Is the BRZ programmed like a Subaru or like a Toyota?

Like a Toyota. The BRZ was developed jointly with Toyota and its immobilizer follows Toyota conventions, including Toyota's registered-key ceiling. A shop set up only for Subaru may not be equipped for it.

Can I program a WRX or BRZ key myself?

No, not in any scenario that matters. Both platforms require a diagnostic connection to register a key. There is no onboard shortcut for all keys lost.

Will my old keys still work afterward?

Yes if the new key was added while an original worked. No if the job was all keys lost — that procedure rebuilds the immobilizer registry and invalidates every previously registered key deliberately.

Does an STI cost more to key than a WRX?

It should not. The STI shares immobilizer architecture with the WRX trim it is based on. Price differences come from smart key versus bladed key, not from performance trim.

I have an aftermarket remote starter. Does that matter?

Yes, tell the technician when you call. Bypass modules spliced into the immobilizer circuit can make a correctly programmed key appear to fail, and identifying them up front saves time on-site.

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WRX or BRZ key lost in Plano? Call or text (945) 307-3827 for mobile Subaru key cutting and programming across Plano, Frisco, Allen, McKinney, and Richardson.

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Written by the Plano Locksmith Automotive Locksmith Team — mobile automotive locksmith service across Plano and Collin County.