ITB21-021

Classification:
Reference:
Date:
BT21-013
ITB21-021
September 14, 2021
REAR HATCH INOPERATIVE OR NOISE WHEN OPENING/CLOSING
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 SPINDLE SENSOR LH and/or DTC B2427-23 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 SPINDLE SENSOR LH and/or DTC B2427-23 SPINDLE SENSOR RH may also be
stored.
NOTE: 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.
1/2
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
DESCRIPTION
PART NUMBER
QUANTITY
DRIVE UNIT-POWER BACK DOOR (Spindle Unit)
90560-5NA0A
As Needed
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
OP CODE
Replace Back Door Spindle Unit
SYM
DIA
FRT
(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
DESCRIPTION
Original bulletin published
2/2
ITB21-021