Infiniti QX50 Key Replacement

The Infiniti QX50 has a tangled lineage: it grew out of the EX and the earlier QX50, and the fob changed along the way and again at its redesign. That model gap and rename are exactly what confuse owners buying a key online, because a fob for the wrong era programs to nothing even though the emergency blade still slides into the lock. With the QX50, identifying which era your crossover belongs to comes before anything else.

We are a mobile automotive locksmith and bring the work to wherever the QX50 is parked, whether that is a Bulloch County driveway, a lot at Statesboro Crossing, or a space off Brampton Avenue. This guide covers what the QX50 uses in each era, how a lost-key visit runs, why a fob for the wrong redesign fails, and how to tell a dead fob battery from a real programming fault.

Which QX50 Key Do You Have?

The QX50 has used Intelligent Keys on the NSN14 emergency blade, but the fob changed across its redesign, so the right one depends on your year. The blade fitting the lock is not proof a fob will program, which is why we confirm the exact part by VIN before we head out.

When Every QX50 Key Is Gone

Losing every working fob on a QX50 is a more involved visit than copying a spare, but one we handle on-site. With nothing to seed authentication, the programmer reads the immobilizer data from the crossover and enrolls a new Intelligent Key through the security system. We build the key from your VIN, cut the NSN14 emergency blade so the door backup works, pair the fob, and confirm the engine starts before we close out.

The lineage gap makes it easy to end up with the wrong-era fob in an all-keys-lost situation, which is exactly why we pin down the year and FCC before we cut or program anything.

Make a Spare QX50 Key Before You Need One

If you still have one working fob, a planned spare is the easy move. With a key on hand to seed the process, programming a second Intelligent Key is short and straightforward, and a luxury crossover running on a single fob is one drained coin cell away from a much harder day. We make and pair spares on-site without a dealer appointment.

Model-Year and Generation Differences

The 2014-2017 cars, rooted in the EX and earlier QX50 line, use the NSN14 emergency blade with the CWTWB1U787 or KR55WK48903 Intelligent Key. These start from a button, with the metal blade tucked in the fob as a door backup.

After the model gap, the 2019-2025 QX50 moves to the KR5TXN7 fob, still on the NSN14 blade. Because the fob FCC changed across the redesign, a key for the wrong era will program to nothing even though the blade fits, so matching the exact fob to your year is the first step before any pairing.

Ignition, Cylinder, and Lock Problems

Since the QX50 starts from a button, there is no turn-key ignition cylinder to wear, but the NSN14 emergency blade and the driver door lock still deserve attention. That blade is your way in when the fob battery dies, and a lock that has rarely been used can feel stiff the first time. We make sure the emergency blade is cut correctly and turns the door cleanly so your backup is ready when it counts.

Is It the Battery or the Programming?

Before assuming the worst, rule out the battery. The QX50 Intelligent Key runs on a CR2032 coin cell, and a weak one is the most common reason the remote stops responding from a distance or the crossover makes you hold the fob to the start button. A fresh cell often brings it back.

A real programming fault is different. If a new battery does not help, if the button presses but the engine will not start, or if a key or security light stays lit, the issue is on the immobilizer side and the key needs to be re-paired. A wrong-era fob also simply will not enroll, which a battery swap cannot address.

QX50 Smart Key and Push-Button Start

The QX50 uses an Intelligent Key with push-to-start: with the fob in a pocket or bag, the doors unlock on touch and the crossover starts from the button. When it stops recognizing the fob, a weak coin cell is the first suspect and a pairing fault the second. Adding or replacing an Intelligent Key is a programming job, and we verify lock, unlock, and push-button start all respond before we leave.

Local QX50 Help in Statesboro and Beyond

We serve QX50 owners across Statesboro and all of Bulloch County, coming to homes, workplaces, and lots rather than asking you to come to us. Whether the crossover sits off Fair Road, along Northside Drive, near East Main Street, or out toward US-301, we bring the service to the vehicle and aim to arrive with the right fob for your VIN the first time.

Realistic QX50 Key Scenarios

Example. An owner off Fair Road bought a fob online for a 2020 QX50 that simply would not program. It was a pre-redesign key; we matched the correct KR5TXN7 fob by VIN, paired it on-site, and confirmed start.

Example. A driver at Statesboro Crossing found the only fob to a 2016 QX50 would not start the crossover. A weak CR2032 coin cell was the cause; we replaced it, confirmed push-button start, and made a spare.

Example. A QX50 along Northside Drive lost both fobs. With nothing to seed from, we read the immobilizer data, built the NSN14-bladed Intelligent Key from the VIN, enrolled it, and tested start and the door backup before leaving.

Before You Call: QX50 Checklist

• The model year of your QX50, since the fob changed across the redesign and earlier lineage.
• The VIN, visible through the lower windshield, so we can match the exact fob.
• How many working fobs you have, since a spare is a shorter job than an all-keys-lost visit.
• Whether a fob you already bought failed to program, which usually points to the wrong era.
• A photo ID and the registration or title, so we can verify the vehicle is yours before programming.
• Whether the trouble is the fob, the remote functions, or a locked door, so we bring the right tools.

QX50 Keys: Dealership or Locksmith?

An Infiniti dealer can make a QX50 key, but it usually means getting the crossover to the dealership, waiting on an appointment, and leaving it on their schedule. As a mobile locksmith we bring the blanks, the programmer, and the correct Intelligent Key to you and finish the job in your driveway or a lot. If a particular case genuinely needs manufacturer coordination, we flag it when we confirm your VIN instead of after we arrive.

More Key and Lock Services

• all Infiniti car keys and models
• ignition repair and replacement
• emergency car lockout help
• how transponder chips work
• how proximity keys work
• smart key guide
• push-to-start key guide

Other compact luxury SUVs we service

Cross-shopping the Infiniti QX50 against other compact luxury SUVs? We make and program keys for these comparable models too:

• Infiniti QX50 vs Lexus NX key replacement
• Infiniti QX50 vs Lincoln Corsair key replacement
• Infiniti QX50 vs Mercedes-Benz GLA key replacement
• Infiniti QX50 vs Mercedes-Benz GLB key replacement

Frequently Asked: QX50 Keys