ITB21-008A

Classification:
Reference:
EL20-046A
Date:
ITB21-008A
December 22, 2022
FRONT DRIVER AND/OR PASSENGER SEAT WILL NOT MOVE FORWARD
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.
APPLIED VEHICLES:
2019-2022 QX50 (J55)
2022 QX55 (FJ55)
IF YOU CONFIRM
After the front driver (LH) and/or passenger (RH) side seat has been moved all the way to the maximum
rearward position and it will not move forward.
Driver (LH) seat
shown, passenger
(RH) is a mirror image
Figure 1
ACTION
Replace the seat lifter/slide assembly.
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
HINT: The SERVICE PROCEDURE in this bulletin displays the front driver (LH) seat. If repairing the front
passenger (RH) seat, it will be a mirror image.
1.
Remove the front seat from the vehicle.

2.
Refer to the ESM: BODY INTERIOR > SEAT > REMOVAL AND INSTALLATION > FRONT SEAT
Place the seat onto a clean work surface.

Skip to step 5 on page 3 for vehicles with climate controlled seats.
HINT: Orient the seat in the best position to perform the following steps.
Vehicles without Climate Controlled Seats
3.
Completely unclip the wiring harnesses from the seat frame cross brace and cross brace bracket, as
shown in Figure 2.
4.
Disconnect the wiring harness from the lifter motor and the slide motor, and then skip to step 17 on
page 9.
Wiring harnesses
Seat frame
cross brace
Seat frame cross
brace bracket
Slide motor
Figure 2
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Lifter motor
ITB21-008A
Vehicles with Climate Controlled Seats
5.
Disconnect the two (2) straps retaining the seatback flap, and fold the flap out of the way.
Seatback flap
Straps (2)
Figure 3
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ITB21-008A
6.
Remove two (2) screws and then unhook the seat cushion rear finisher by moving it in the direction
indicated in Figure 4, and then move the seat cushion rear finisher out of the way.

Leave the seat cushion rear finisher connected to the wiring harness.
Location of
hooks
Seat cushion
rear finisher
Figure 4
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ITB21-008A
7.
Completely unclip the wiring harnesses from the seat frame cross brace and cross brace bracket, as
shown in Figure 5.
8.
Remove the two (2) screws, circled in Figure 5, that retain the driver seat control unit to the seat frame
cross brace.

9.
Leave the seat control unit connected to the wiring harness.
Disconnect the wiring harness from the lifter motor and the slide motor, and then fold the harness back
out of the way.
Wiring harnesses
Seat frame
cross brace
Seat control unit. Held
by two (2) screws
Seat frame cross
brace bracket
Lifter motor
Slide motor
Figure 5
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ITB21-008A
10.
Disconnect the wiring harness connector from the climate controlled seat unit.
11.
Detach the output duct of the climate controlled seat unit.
12.
Remove the five (5) screws circled in Figure 6, and then remove the climate controlled seat unit from the
seat frame.
13.
Unclip any remaining harnesses shown in Figure 6 (below) and Figure 7 on page 7.
Output duct
Wiring
harnesses
Climate controlled
seat unit
Wiring
harnesses
Climate controlled
seat unit wiring
harness connector
Figure 6
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ITB21-008A
14.
Detach the seat back finisher flap from the seat frame and fold it back out of the way.
Wiring
harnesses
Seat back
finisher flap
Wiring
harness
Detach seat back
finisher flap here
Figure 7
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ITB21-008A
15.
Remove the output duct, as shown in Figure 8.
16.
Unclip the climate controlled seat unit mounting plate (mounting plate) as follows:
a. Gently push the two (2) latch clips, one at a time, toward the seat cushion to release them from the
seat cushion springs.
b. Slide the mounting plate in the direction indicated in Figure 8.
c. When the two (2) latch clips have cleared the seat cushion springs they were clipped to, lift the
mounting plate away from the seat assembly.
Mounting plate
Seat cushion
spring
Latch clips
Output duct
Figure 8
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ITB21-008A
17.
Remove the seat cushion from the seat frame.

Refer to the ESM: BODY INTERIOR > SEAT > UNIT DISASSEMBLY AND ASSEMBLY > FRONT
SEAT
HINT: Disconnect the seat switches from the wiring harness, and remove the seat switches and the
switch finisher as an assembly.
Seatback
recliner motor
18.
Disconnect the wiring harness from the
seatback recliner motor.
Wiring harness
Figure 9
19.
20.
Detach two (2) seatbelt buckle wiring harness
clips from the seat frame.
Wiring harness
clips (2)
Seatbelt
buckle nut
Remove the seatbelt buckle from the seat
frame.

Attached by one (1) nut.
Figure 10
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ITB21-008A
21.
Confirm that the white plastic clip shown in Figure 11 is attached to the seat switch finisher. If still
attached to the seat frame, remove it and relocate it back to the seat switch finisher.
White plastic clip
Front of vehicle
Shown looking from bottom up
Figure 11
Seat cushion outer
finisher (RH)
22.
Confirm that the white plastic clip shown in
Figure 12 is attached to the seat cushion outer
finisher (RH). If still attached to the seat frame,
remove it and relocate it back to the seat
cushion outer finisher (RH).
Figure 12
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ITB21-008A
23.
Remove the four (4) star bit fasteners that attach the seat lifter/slide assembly to the seatback frame,
shown circled in Figure 13 and Figure 14.

Figure 13 and Figure 14 are shown with the seat sitting upright.
To avoid damage to the fasteners, insert the tool completely into the head of the fastener when removing.
Seatback
frame
C
A
D
B
Seat lifter/slide
assembly
Figure 13
24.
Lift the seat back assembly away from the seat lifter/slide assembly and transfer it to the new seat
lifter/slide assembly.

25.
Figure 14
See the PARTS INFORMATION on page 14.
Apply blue thread-locker to all four (4) star bit fasteners removed in step 23, and then install them finger
tight in the following order (see Figure 13 and Figure 14):

A, B, C, D
HINT: If one or more star bit fasteners have been damaged, they can be ordered as needed.
26.
Torque all four (4) star bit fasteners to 35 N•m (3.57 kg-m, 25.8 ft-lb) in the same “A-B-C-D” order.
27.
Apply blue thread-locker to the seatbelt buckle
nut and attach the seatbelt buckle to the seat
frame.

28.
Wiring
harness clips
Seatbelt
buckle nut
Torque to 49 N•m (5.0 kg-m, 36 ft-lb)
Attach two (2) seatbelt buckle wiring harness
clips to the seat frame.
Figure 15
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ITB21-008A
Seatback
recliner motor
29.
Connect the wiring harness to the seatback
recliner motor.
Wiring harness
Figure 16
30.
Remove the felt tape from the two (2) metal
clips on the switch finisher, and apply new felt
tape (see Figure 11 on page 10 for locations).

See PARTS INFORMATION on
page 14.
Felt tape on
metal clip
Figure 17
31.
Install the seat cushion onto the seat frame.

Refer to the ESM: BODY INTERIOR > SEAT > UNIT DISASSEMBLY AND ASSEMBLY > FRONT
SEAT
32.
Connect the wiring harness to the lifter motor and the slide motor.
33.
Reassemble the remaining seat components in the reverse order of disassembly.
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ITB21-008A
34.
Install the seat into the vehicle.

Refer to the ESM: BODY INTERIOR > SEAT > REMOVAL AND INSTALLATION > FRONT SEAT
Driver (LH)
front seat
HINT: When installing the driver (LH) front
seat, tighten the bolts to specification in the
order shown in Figure 18.
 Front seat bolt torque: 49 N•m (5.0 kg-m,
36 ft-lb)
Figure 18
Passenger
(RH) front seat
HINT: When installing the passenger (RH)
front seat, tighten the bolts to specification in
the order shown in Figure 19.
 Front seat bolt torque: 49 Nm (5.0 kg-m,
36 ft-lb)
Figure 19
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ITB21-008A
PARTS INFORMATION
DESCRIPTION
FRAME ASSY - CUSHION, FRONT SEAT LH
(Seat lifter/slide assembly)
FRAME ASSY - CUSHION, FRONT SEAT RH
(Seat lifter/slide assembly)
BOLT-SPL (Star Bit Fasteners)
(1)
(2)
(3)
(4)
(5)
(6)
PART NUMBER
QUANTITY
87152-XXXXX (1)
1
87152-XXXXX (1)
1
86899-4BA3A
(2)
Blue Thread-locker
(3)
(4)
Felt Tape (5)
NI-50397-4
(6)
Look up the part number by the VIN in the Electronic Parts Catalog (EPC).
As needed, if damaged during removal.
This item can be sourced locally from most auto parts outlets.
Shop supply.
Sourced from Squeak and Rattle Kit.
See EXPENSE CODE.
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
(1)
(2)
DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
Replace Seat Cushion Frame Assembly
(1)
VH32AA
ZE
32
(2)
Reference the electronic parts catalog and use the Seat Cushion Frame Assy (87152-*****) as the
Primary Failed Part (PFP).
Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat Rate Time (FRT).
EXPENSE CODE
EXPENSE CODE
Description
Max Amount
041
Felt Tape
$1.64
AMENDMENT HISTORY
PUBLISHED DATE
REFERENCE
DESCRIPTION
April 9, 2021
ITB21-008
Original bulletin published
December 22, 2022
ITB21-008A
Changes throughout
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ITB21-008A