Classification:

Reference:

BT21-013A

Date:

ITB21-021A

October 6, 2025

REAR HATCH INOPERATIVE OR NOISE WHEN
OPENING/CLOSING
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.

APPLIED VEHICLES:

2019-2021 QX50 (J55)
2022 QX55 (J55X)

IF YOU CONFIRM
The client states that either the rear hatch is inoperative, or the rear hatch closes after opening
only a small amount,
AND
DTC B2426-23 for “SPINDLE SENSOR LH” and/or DTC B2427-23 for “SPINDLE SENSOR
RH” is stored,
AND/OR
There is a growling type noise from the rear hatch area when opening/closing the rear hatch.
•

DTC B2426-23 for “SPINDLE SENSOR LH” and/or DTC B2427-23 for “SPINDLE
SENSOR RH” may also be stored.

HINT: If any DTC other than B2426-23 and/or B2427-23 is stored, this bulletin does not apply.

ACTION
Replace ONLY the spindle unit that is confirmed to be setting one of the DTCs listed above
and/or causing the growling noise. Do NOT replace both spindle units when diagnosis leads to
replacement of only one.
HINT:
Rear hatch spindle units are not hydraulic systems. If a rear hatch spindle unit appears to be
leaking, this is normal drainage of water (rain, car wash, condensation) and design intended
water management.
Do not replace spindle units for suspected leaking.
IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will
be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains
information that is essential to successfully completing this repair.
Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are
properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job
properly and safely. NOTE: If you believe that a described condition may apply to a particular vehicle, DO
NOT assume that it does. See your Infiniti retailer to determine if this applies to your vehicle.

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SERVICE PROCEDURE
1.

Replace the affected spindle unit.
•

Refer to the ESM: BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY >
DOOR & LOCK > REMOVAL AND INSTALLATION > BACK DOOR LOCK >
SPINDLE UNIT

PARTS INFORMATION
MODEL
2019-2021 QX50
2022 QX55

DESCRIPTION
DRIVE UNIT-POWER BACK
DOOR (Spindle Unit)
DRIVE UNIT-POWER BACK
DOOR (Spindle Unit)

PART NUMBER

QUANTITY

90560-5NA0A

As Needed

90560-5VG0B

As Needed

CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
OP CODE SYM DIA FRT
Replace Back Door Spindle Unit

(1)

UN57AA

ZE

32

(2)

DESCRIPTION

PFP

OP CODE

SYM

DIA

FRT

Additional Spindle Unit

(1)

UN571A

ZE

32

(2)

And if needed on the same line

(1)
(2)

Reference the PARTS INFORMATION table above and use the Power Back Door
Drive Unit as the Primary Failed Part (PFP).
Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat
Rate Time (FRT).

AMENDMENT HISTORY
PUBLISHED DATE

REFERENCE

September 14, 2021

ITB21-021

October 6, 2025

ITB21-021A

DESCRIPTION
Original bulletin published
Amended to update PARTS
INFORMATION

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ITB21-021A