Classification:

Reference:

Date:

EL20-046

ITB21-008

April 9, 2021

2019-2020 QX50; DRIVER SEAT WILL NOT MOVE FORWARD
APPLIED VEHICLES:

2019-2020 QX50 (J55)

IF YOU CONFIRM
After the driver side seat has been moved all the way to the maximum rearward position, it will not move
forward.

Figure 1
ACTION
Replace the driver side 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

1.

Remove the driver side seat from the vehicle.


2.

Refer to the Electronic Service Manual (ESM): Section BODY INTERIOR > SEAT > REMOVAL
AND INSTALLATION > FRONT SEAT.

Place the driver side seat onto a clean work surface.


Skip to step 5 on page 3 for vehicles with climate control seats.

NOTE: Orient the driver seat in the best position to perform the following steps.
Vehicles without Climate Control Seats
3.

Completely unclip the wiring harnesses from the seat frame cross brace and cross brace bracket, 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

ITB21-008

Vehicles with Climate Control Seats

5.

Disconnect the two straps retaining the seatback flap, and fold the flap out of the way.

Seatback flap

Straps

Figure 3

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ITB21-008

6.

Remove 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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ITB21-008

7.

Completely unclip the wiring harnesses from the seat frame cross brace and cross brace bracket, shown
in Figure 5.

8.

Remove the 2 screws, circled in Figure 5, that retain the “driver seat control unit” to the seat frame cross
brace.


9.

Leave the driver 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

Driver seat control unit.
Held by two screws

Seat frame cross
brace bracket

Lifter motor
Slide motor

Figure 5

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ITB21-008

10.

Disconnect the wiring harness connector from the climate control seat unit.

11.

Detach the output duct of the climate control seat unit.

12.

Remove the 5 screws circled in Figure 6, and then remove the climate control 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 control
seat unit

Wiring
harnesses

Climate control seat
unit wiring harness
connector

Figure 6
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ITB21-008

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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ITB21-008

15.

Remove the output duct shown in Figure 8.

16.

Unclip the “climate control seat unit mounting plate” (mounting plate) as follows:
a. Gently push the 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 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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ITB21-008

17.

Remove the seat cushion from the seat frame.


Refer to the ESM: Section BODY INTERIOR > SEAT > UNIT DISASSEMBLY AND ASSEMBLY >
FRONT SEAT.
NOTE: 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.

Wiring
harness clips

Detach 2 seatbelt buckle wiring harness clips
from the seat frame.

Seatbelt
buckle nut

Remove the seatbelt buckle from the seat
frame.


Attached by 1 nut.
Figure 10

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ITB21-008

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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ITB21-008

23.

Remove the 4 Torx® bolts 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.

Insert the tool completely into the head of the Torx® bolts when removing. If the tool is not
completely inserted, the Torx® bolts may be damaged.

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) Torx® bolts removed in step 23, and then install them finger tight in
the following order (see Figure 13 and Figure 14):


A, B, C, D

NOTE: If one or more Torx® bolts have been damaged, they can be ordered as needed.
26.

Torque all four Torx® bolts to 35 N•m (3.57 kg-m, 25.8 ft-lbs) 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 kg-m, 36 ft-lbs)

Attach 2 seatbelt buckle wiring harness clips to
the seat frame.
Figure 15

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ITB21-008

Seatback
recliner motor

29.

Connect the wiring harness to the seatback
recliner motor.
Wiring harness
Figure 16

30.

Remove the felt tape from the 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: Section 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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ITB21-008

34.

Install the seat into the vehicle.


Refer to the ESM: Section BODY INTERIOR > SEAT > REMOVAL AND INSTALLATION > FRONT
SEAT.

NOTE: When installing the front seat (LH), tighten the
bolts to specification in the order shown.
 Front seat (LH) bolt torque: 49 Nm (5.0 kg-m,
36 ft-lb)

Figure 18

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ITB21-008

PARTS INFORMATION

(1)
(2)
(3)
(4)
(5)

DESCRIPTION
FRAME ASSY - CUSHION, FRONT SEAT LH
(Seat lifter/slide assembly)
BOLT-SPL (Torx® Bolts)

PART NUMBER

QUANTITY

87152-XXXXX (1)

1

86899-4BA3A

(2)

Blue Thread-locker

(3)

(4)

Felt Tape (5)

J-50397-4

(4)

Look up part number by VIN in 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.

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 Left 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).

AMENDMENT HISTORY
PUBLISHED DATE

REFERENCE

April 9, 2021

ITB21-008

DESCRIPTION
Original bulletin published

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ITB21-008