Infiniti QX80 and Q70 (2014-2026) Intelligent Key Replacement in Plano

The QX80 and the Q70 are the two Infiniti models we are most often called out to in Plano with a key problem, and they share the same underlying story: a full-size platform, an Intelligent Key system built on Nissan's immobilizer architecture, and owners who almost always discover they only have one working key at the worst possible moment. Both are entirely serviceable in a driveway. For same-day Infiniti key service, call or text (945) 307-3827.

Quick Answer

As of September 2026, adding a spare Intelligent Key to a QX80 or Q70 while one key still works runs roughly $250 to $480 in Plano and takes 30 to 60 minutes on site. All keys lost runs roughly $380 to $700 or more and takes 60 to 150 minutes, because the immobilizer registry has to be rebuilt from vehicle data instead of copied from a key the car already trusts. Both jobs are mobile and neither requires towing the vehicle.

Infiniti Key Pricing in Plano

Service	Typical Plano range (Sep 2026)	On-site time	Notes
Intelligent Key spare, one key working	$250 - $480	30 - 60 min	The standard QX80 and Q70 job
Second key added during the same visit	$110 - $260	+15 - 25 min	Mostly the cost of the part
All Intelligent Keys lost	$380 - $700+	60 - 150 min	Registry rebuilt from vehicle data
Emergency blade cut only, door access	$90 - $180	20 - 40 min	Opens the door, will not start the vehicle
Fob shell or emergency blade replacement	$70 - $160	15 - 35 min	When the circuit board is healthy
Fob battery replaced and function checked	$10 - $180	10 - 30 min	Frequently the entire fix
Diagnosis when the fault may not be the key	$75 - $140	20 - 35 min	Applied to the repair if you proceed
After-hours or emergency response	Surcharge applies	-	Confirmed on the phone before dispatch

How the Infiniti Intelligent Key System Actually Works

Infiniti runs Nissan's immobilizer architecture with an Infiniti badge on it, and understanding the three pieces explains most of the pricing and nearly all of the failure modes.

The Intelligent Key itself carries two independent functions in one shell: a passive credential the vehicle reads at close range to permit starting, and a battery-powered remote radio for lock, unlock and remote start. Those halves fail separately, which is why a QX80 that starts perfectly can have completely dead lock buttons. That specific split is worth reading about in a key that starts the car but will not lock it before you assume you need a new key.

The body control module is the piece that actually holds the list of keys the vehicle accepts. Registering a key is not something that happens inside the key, it is a write to the vehicle's memory. That is why keys cannot be programmed remotely, why a fob bought online is not "already programmed" no matter what the listing claims, and why every job on this platform needs a technician physically at the vehicle. Our broader notes on Nissan and Infiniti Intelligent Key and BCM work go deeper on the module side.

The security credential is the gate. Adding a key when one already works is a relatively short authenticated session. Doing it with nothing that the vehicle trusts means the technician has to derive that credential from vehicle data before any key can be written. That derivation step is most of the price difference between a spare and an all-keys-lost job, and it is also most of the time difference.

QX80 Specifics

The QX80 has been in the Plano market long enough to span meaningfully different builds, and the practical differences that show up on a job are these:

Key count. These vehicles hold a small, fixed number of registered keys, typically four to five depending on build. That ceiling is real. When the registry is full, adding a new key means the full set gets rewritten and any key not physically present at the session stops working. If you have keys scattered across two households, gather them before the technician arrives. The same constraint bites Toyota and Lexus owners, and we described the general problem in maximum keys registered limits.

All keys lost on a large SUV is still mobile. People assume a vehicle this size with no key needs a flatbed. It does not. The work happens through the vehicle's diagnostic connection at whatever parking space the QX80 is currently occupying, whether that is a driveway in West Plano or a garage level at Legacy West.

Remote start complicates the symptom picture. On builds with factory remote start, an owner will sometimes report that the vehicle starts remotely but will not start with the key in hand. That is not a contradiction and it is not a key that is half-working: remote start runs on a different authorization path than a driver-present start. It usually points at the passive detection side or the key's transponder, not at the remote.

Q70 Specifics

The Q70, which carried the M-series lineage forward from 2014 until the model wound down, is a straightforward car to service and its faults skew older-vehicle rather than newer-technology.

Push-button start with a worn start switch. On higher-mileage Q70s we occasionally find the complaint is a tired start button or a steering column lock actuator rather than a key at all. A car that intermittently does nothing when the button is pressed, with the dash otherwise lit, deserves a diagnosis before anyone sells it a key, and the ranges for that branch are in our ignition repair cost guide.

Fob heat damage. Q70 fobs that spent a decade of North Texas summers in a cabin frequently show button pad wear and reduced range before they fail. If your range has been shrinking for months, that is a fob nearing the end rather than a battery problem, and it is a much better week to buy a spare than the week after it quits.

Ownership documentation matters more on an out-of-production car. We check title or registration against photo ID on every job. On a model that changes hands frequently and is often bought from private sellers, that check is doing real work.

The Job, Start to Finish

A typical spare-key session on either model runs like this. The technician verifies ownership, identifies the exact key part for your build rather than a catalog approximation, cuts the emergency blade so the door can still be opened when the fob is flat, connects to the vehicle, authenticates, writes the new key into the registry, and then tests every key that is present.

That final test is the step most worth insisting on. Every key should start the engine, lock and unlock the doors, open the liftgate or trunk, and be detected from the driver's seat with the fob in a pocket rather than on the console. A key that only works when it is touching the start button has not been finished properly.

On an all-keys-lost job the same sequence runs with the credential derivation in front of it and a longer authentication window. Expect the technician to be in the vehicle a while with a laptop or a dedicated tool connected. If a security or immobilizer light stays lit through the session, that is normal until the registry write completes, but a light that persists after a successful start belongs in the branch covered by the immobilizer light no-start guide.

Independent Specialist Versus the Infiniti Dealer

For these two models this is a clean comparison. The dealer route means arranging transport for a vehicle that will not start, ordering a key against the VIN, and paying a service-drive labor line on top of the part. The mobile route brings the key stock, the cutting machine and the programming equipment to the vehicle, and the QX80 never leaves its parking space.

There are makes and model years across the industry where the manufacturer restricts key generation to its own channel and no independent shop can complete the job. Mercedes drew that line at FBS4, which we cover in Mercedes FBS4 key programming limits, and Porsche and Volkswagen enforce something similar through component protection. For the QX80 and Q70 model years above, this work is routinely completed independently, which is exactly why so many of these jobs finish in a driveway in under an hour.

What to Have Ready

1. Year, model and VIN. The VIN is visible through the windshield, on the door jamb, and on your insurance card.
2. Every key you own, working or not. Because of the registration ceiling, keys that are not present may stop working after the session.
3. Whether any key still starts the vehicle. This is the single biggest factor in the price.
4. Title or registration plus matching photo ID. Non-negotiable, and it protects you more than it protects us.

Frequently Asked Questions

How much is an Infiniti QX80 key in Plano? As of September 2026, a spare Intelligent Key with one working key runs roughly $250 to $480 and takes 30 to 60 minutes on site. With all keys lost, expect $380 to $700 or more and 60 to 150 minutes, because the immobilizer registry has to be rebuilt.

Can an Infiniti key be programmed without the dealer? Yes, for the QX80 and Q70 model years covered here. The registration is a write to the vehicle's body control module and can be completed at your location with the correct equipment and a verified ownership check. The vehicle does not need to be towed.

How many keys can a QX80 or Q70 hold? A small fixed number, typically four to five depending on build. When the registry is full, adding a key rewrites the full set and any key not physically present during the session stops working, so bring every key you own to the appointment.

My QX80 starts with remote start but not with the key in my hand. What is wrong? Those are two different authorization paths, so this is a coherent symptom rather than a contradiction. It usually points at the passive detection side or the key's transponder chip rather than the remote radio, and it deserves a diagnosis before a key is purchased.

Can I buy an Infiniti fob online and have you program it? Sometimes, and often not. Online fobs are frequently the wrong build variant or FCC ID, and some arrive already locked to another vehicle and cannot be reused. When a customer-supplied part checks out we will program it. We stock correct parts so that a failed online purchase does not become part of your bill.

How long does an all-keys-lost job take on a QX80? Typically 60 to 150 minutes on site, depending on how cleanly the vehicle communicates and how many keys you want written in the same session. Adding a second key at that point costs the part plus about twenty minutes, which is the cheapest key you will ever buy for this vehicle.

Book an Infiniti Key in Plano

Call or text (945) 307-3827 with your VIN and how many working keys you have. We cover Plano, Frisco, McKinney, Allen, Richardson and Garland, and most QX80 and Q70 key work is finished in your driveway or your office lot while you keep working. If you are researching before anything has gone wrong, the honest advice is short: make the spare now.

---

Written by the Plano Locksmith Automotive Locksmith Team. Prices reflect typical Plano-area ranges as of September 2026 and are confirmed against your specific vehicle before any work begins.