Which Infiniti QX50 does the 285E3-5NA3A smart key fit?

The 285E3-5NA3A smart key fits the Infiniti QX50 2019-2020 with the 4-button layout, North American version. Match the part number printed on the back of the original key, and the button layout, before ordering. Keys for the same car can differ by trim, market and button count.

Is the FCC ID enough to pick the right key?

No. The FCC ID KR5TXN1 is a radio approval that Infiniti also uses on 285E3-5NA7A, 285E3-5NY3A, 285E3-5NY6A. Those keys can fit other cars or have other buttons, so the part number 285E3-5NA3A on the original key is the deciding reference.

What frequency and transponder chip does the 285E3-5NA3A key use?

The 285E3-5NA3A smart key transmits at 433 MHz and carries a HITAG AES, ID 4A (NCF29A1M) transponder inside the housing. No separate chip is needed, but the key must be registered to the car with a diagnostic tool before it unlocks the doors or starts the engine.

How is the Infiniti QX50 2019-2020 smart key programmed?

The Infiniti QX50 2019-2020 smart key is programmed over the OBD-II port with the dealer system or a locksmith key programmer that covers this model. Registration needs the BCM PIN and erases every stored key, so register all keys in one session.

Is the emergency blade included with the 285E3-5NA3A key?

No. The 285E3-5NA3A smart key is supplied as the key only, without its emergency insert blade; it takes an NSN14 profile blade. Source the blade separately and cut it to the vehicle's key code, by code or by decoding the door lock.

Is this 285E3-5NA3A key a genuine Infiniti part?

Yes. This listing is a genuine factory Infiniti 285E3-5NA3A smart key, supplied new and unprogrammed, without the emergency blade. It is programmed to the car over OBD like any new key. Match the part number on the original first.

Which battery does the 285E3-5NA3A smart key take?

The 285E3-5NA3A smart key runs on a CR2032 coin cell battery, fitted inside the housing. Replace it when the range drops or the dashboard shows a low key battery warning. If the battery is flat, hold the key against the start button to start the car.

Infiniti QX50 2019-2020 Key KR5TXN1 285E3-5NA3A Genuine

Name: Infiniti QX50 2019-2020 Smart Key 4-button 433MHz - 285E3-5NA3A - Genuine · OEM · New
Brand: Infiniti
SKU: B00133
Price: 249.97 AED
Availability: InStock

Specification

Value

Vehicle Make

Infiniti

Condition

Genuine Brand New

Country of Manufacture

Mexico

Region

GCC & Europ, Usa & Canada

Frequency

433 MHz

Battery

CR2032

Buttons Count

4-buttons

Color

Black

Weight

0.06 kg

Genuine · OEM · New

Infiniti QX50 2019-2020 Smart Key 4-Button

4-button · 433 MHz · ID4A · FCC ID KR5TXN1 · Part 285E3-5NA3A

Buttons

433 MHz

Frequency

ID4A

Transponder chip

CR2032

Battery

⭐ The Infiniti QX50 2019-2020 4-button smart key on part number 285E3-5NA3A is offered here as a new genuine factory Infiniti unit, working at 433 MHz and carrying a HITAG AES, ID 4A (NCF29A1M) transponder. Its buttons cover lock, unlock, hatch, panic. It is supplied as the key only, without the emergency blade, and is registered over OBD with a diagnostic tool. The same radio approval is fitted to 285E3-5NA7A, 285E3-5NY3A, 285E3-5NY6A, so the part number, not the FCC ID, decides the order.

⚙️ Key features

4-button layout

Lock, unlock, hatch, panic.

433 MHz with ID4A

433 MHz transmitter paired with a HITAG AES, ID 4A (NCF29A1M) transponder for proximity entry and push-button start.

FCC ID is shared

Its radio approval is also used on 285E3-5NA7A, 285E3-5NY3A; the part number 285E3-5NA3A is the reference.

CR2032 coin cell

Runs on a user-replaceable CR2032 battery. The emergency blade is sourced separately.

💎 Benefits

Same layout as the original

Customers get back the 4 functions they use every day, with nothing missing on handover.

Clear part reference

Part number 285E3-5NA3A on the listing makes it quick to match against the customer's key.

Factory electronics

A genuine Infiniti unit, so the electronics match the original key exactly.

Customer confidence

A factory key reassures customers who want the same part the car was built with.

👥 Who it's for

Automotive locksmiths

Add-key and all-keys-lost jobs on the Infiniti QX50 with OBD key programmers.

Key shops and counter trade

Stock for walk-in spare key requests on the QX50.

Dealers and garages

Replacement keys for used QX50 stock and service customers.

🚗 Compatible vehicles

INFINITIQX502019-2020

Before ordering, match part number 285E3-5NA3A or FCC ID KR5TXN1 printed on the original key.

📦 What's included

✅ IN THE BOX

✔ 1 × genuine new 4-button smart key with HITAG AES, ID 4A (NCF29A1M) transponder

❌ NOT INCLUDED

✘ Emergency insert blade (NSN14 profile) - source separately and cut to the vehicle's key code

✘ Programming to the vehicle - done over OBD with a diagnostic tool

📋 Specifications

📡 REMOTE

FCC ID

KR5TXN1

Frequency

433 MHz

Buttons

4 (incl. panic)

Key type

Smart proximity key, push-button start

7812D-TXN1

🔐 TRANSPONDER & BLADE

Transponder chip

HITAG AES, ID 4A (NCF29A1M)

Emergency key blade

Not included

Blade profile

NSN14

📦 PHYSICAL & POWER

Battery

CR2032

Weight

60 g

Condition

Genuine · OEM · New

🔢 PART NUMBERS

285E3-5NA3A part number

IMPORTANT - READ BEFORE ORDERING

BCM PIN and all keys in one session - Infiniti Intelligent Key registration needs the BCM PIN, calculated from the challenge code the tool reads, and it erases every stored key, so all of the customer's keys must be registered in the same session.

FCC ID is not enough - the same approval number is used on 285E3-5NA7A, 285E3-5NY3A, 285E3-5NY6A, so match part number 285E3-5NA3A on the original.

Not the 285E3-5NA7A key - 5-button QX50 2019-2020 key that adds remote start, same FCC ID; match 285E3-5NA3A on the original.

Not the 285E3-5NY3A key - Later 4-button QX50 / QX55 key on the same FCC ID (2020 on); match the part number; match 285E3-5NA3A on the original.

Market version - this key is the North American version; check the part number on the original before ordering.

Blade not included - this key is supplied without its emergency insert blade; source an NSN14 blade and cut it to the vehicle's key code.

Genuine factory key - a new genuine Infiniti unit, supplied unprogrammed.

🛠️ Programming instructions

🔌OBD PROGRAMMING - DIAGNOSTIC TOOL REQUIRED

This proximity smart key cannot be learned by hand. It is registered to the car through the OBD-II port with a diagnostic tool.

Compatible tools: the Nissan CONSULT dealer system, or locksmith tools whose software lists this model, such as Autel IM608, Xhorse VVDI Key Tool Plus.

Add key (spare): connect over OBD, read the BCM challenge and calculate the PIN, then register the new key together with every existing key the customer keeps, because registration erases all stored keys.

All keys lost: the BCM PIN is calculated from the challenge code first, then each key is registered in the same session.

Blade: cut the NSN14 emergency blade, sourced separately, to the vehicle's key code and test it in the driver's door.

Check coverage first: support depends on the tool's software version and the exact model year. Verify the Infiniti QX50 2019-2020 smart key is in the tool's supported list before the job.