Classification:

Reference:

EM22-007B

Date:

ITB22-038B

August 4, 2023

TURBOCHARGER REPLACEMENT PROCEDURE
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.

APPLIED VEHICLES:

2016-2023 Q50 (V37)
2017-2022 Q60 (CV37)

APPLIED ENGINES:

VR30DDTT

SERVICE INFORMATION
If either one or both turbochargers require replacement, refer to the SERVICE
PROCEDURE in this bulletin for the updated procedure.
IMPORTANT: You MUST closely follow the entire SERVICE PROCEDURE as it contains
information that is essential to successfully completing this repair.


2016-2017 Q50 and 2017 Q60 will require an ECM reprogramming at the end of
this SERVICE PROCEDURE for Turbocharger Exhaust Gas Temperature Sensor
deletion. Refer to ITB17-050.

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. HINT: 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.
1/62

SERVICE PROCEDURE

Remove Driveline
IMPORTANT: The following Figures are of an AWD vehicle; 2WD is similar.

1.

Place the vehicle on a lift that will allow the drivetrain to be removed.

2.

Remove the Engine Cover.


3.

Refer to the ESM: REPAIR > ENGINE > ENGINE MECHANICAL > REMOVAL
AND INSTALLATION > ENGINE COVER

Remove the Cowl Top Cover RH and Cowl Top Cover LH.


Refer to the ESM: REPAIR > BODY EXTERIOR, DOORS, ROOF & VEHICLE
SECURITY > EXTERIOR > REMOVAL AND INSTALLATION > COWL TOP

4.

Disconnect the battery cable from the negative terminal.

5.

Remove the cover from the battery positive terminal.

6.

Disconnect the battery cable from the positive terminal.

7.

Release the fuel pressure.
f

To avoid the risk of death or severe personal injury, work in a well-ventilated area to
prevent gasoline vapors from accumulating and to prevent their possible ignition.


Refer to the ESM: DIAGNOSIS > ENGINE > ENGINE CONTROL SYSTEM >
BASIC INSPECTION > ENGINE CONTROL SYSTEM > FUEL PRESSURE
CHECK

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ITB22-038B

8.

Disconnect the wiring harness connector shown in Figure 1.

9.

Roll up the wiring harness dust boot (Figure 1).

Wiring harness
connector

Dust boot

Figure 1

10.

Disconnect the Engine Control
Harness connector from the Engine
Room Harness connector (Figure 2),
located under the dust boot.
Engine Control Harness to Engine
Room Harness connectors
Figure 2

11.

Disconnect the wiring harness connector shown in Figure 3.


12.

Located directly behind the battery.

Detach the two (2) engine control harness mounting clips (Figure 3).

Wiring harness
connector
Wiring harness
mounting clips (2)
Figure 3
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ITB22-038B

13.

Detach the Engine Control Harness
grommet from the bulkhead.

Engine Control
Harness grommet
Figure 4

Vacuum Hose 1
14.

Vacuum piping

Disconnect Vacuum Hose 1 from the
vacuum piping (Figure 5), and then
detach its grommet from the bulkhead.

Grommet
Figure 5
15.

Disconnect the three (3) ECM wiring harness connectors.

ECM wiring
harness
connectors (3)

Figure 6

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ITB22-038B

16.

Disconnect the three (3) wiring harness connectors shown in Figure 7.
Wiring harness
connectors (3)

Figure 7

17.

Positive battery
cable nut

Remove the positive battery cable nut,
and then remove the positive battery
cable from the battery terminal with
fusible link.

Battery terminal
with fusible link

18.

Disconnect the engine wiring harness
from its mounting bracket.

19.

Detach the positive battery cable
grommet from the vehicle.
Positive battery
cable grommet

Figure 8

Positive
battery cable

Mounting
bracket

Figure 9
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ITB22-038B

20.

Detach the body ground cable (Figure 10) and the engine ground cable (Figure 11).


The body ground cable is located on the driver (LH) side of the engine room inner
fender.



The engine ground cable is located on the front of the timing cover.

Body
ground cable

Engine
ground cable
Figure 10

Figure 11

21.

Remove all vehicle Under Covers.

22.

Drain the coolant from the radiator.

23.

Remove the two (2) bolts retaining the engine room wiring harness bracket shown in
Figure 12.

24.

Disconnect both the passenger (RH) side and the driver (LH) side heater hoses from
the engine.

Passenger (RH) side
heater hose

Figure 12

Driver (LH) side
heater hose

Figure 13

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ITB22-038B

25.

Detach Fuel Feed Hose 2.

Fuel Feed Hose 2
Figure 14

26.

Disconnect Water Hose 1 from
Connector Pipe 3.
Connector Pipe 3
Water Hose 1
Figure 15

27.

Disconnect Water Hose 9 from Water
Pipe 3.
Water Pipe 3

Water Hose 9

Figure 16

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ITB22-038B

28.

Remove the Air Duct (inlet), shown in Figure 17.


Eight (8) clips.

Air Duct (inlet)
Clips (8)

Figure 17

Reservoir Tank
Hose

29.

Disconnect the Radiator Hose (Upper)
and the Reservoir Tank Hose from the
Multi-way Control Valve.

Multi-way
Control Valve

Radiator Hose
(Upper)
Figure 18

Radiator Hose
(Upper)
30.

Disconnect the Radiator Hose (Upper)
from the radiator.

Radiator
Figure 19

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ITB22-038B

31.

Unclip the first clip of the passenger (RH) side and the driver (LH) side Hood Side
Seal Assemblies, to allow access to the Air Cleaner Body (bank 1) and Air Cleaner
Body (bank 2) mounting bolts (Figure 20).
Hood Side Seal
Assemblies

Mounting bolt locations
Clips
Figure 20

32.

Disconnect both MAF sensor wiring harness connectors from the MAF sensors
(Figure 21), located on the Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2).

33.

Unclip the MAF sensor wiring harnesses from Air Cleaner Body (bank 1) and Air
Cleaner Body (bank 2).

34.

Unbolt both Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2); two (2) bolts
each where shown in Figure 21.

35.

Detach both Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2) from Air Duct
(bank 1) and Air Duct (bank 2), and then remove them from the vehicle.


Air Duct (bank 1) and Air Duct (bank 2) are located beneath Air Cleaner Body
(bank 1) and Air Cleaner Body (bank 2).

Air Cleaner
Body (bank 1)

Bolts (4)

MAF sensors

Air Cleaner
Body (bank 2)

Figure 21

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ITB22-038B

36.

Place tape over Air Duct (bank 1) and Air Duct (bank 2) inlets, to prevent foreign
objects from entering the ducts.
To prevent engine damage, tape must be placed over both duct inlets. If foreign
debris enter either duct inlet, turbocharger damage and possibly engine damage may
occur.

37.

For vehicles that have an oil cooler, remove the two (2) bolts retaining Oil Cooler
Pipe 1 bracket to the vehicle (Figure 22 and Figure 23), located under the Air Cleaner
Body (bank 1).

Bolts (2)

Figure 23

Figure 22

High-Pressure
Flexible Hose

38.

Recover the A/C refrigerant using
approved equipment.

39.

Disconnect the High-Pressure Flexible
Hose from the condenser.


Bolt (1)

One (1) bolt.

Figure 24

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ITB22-038B

Low-Pressure
Flexible Hose

40.

Disconnect the Low-Pressure Flexible
Hose from the Internal Heat
Exchanger Pipe.


One (1) bolt.
Bolt (1)

Figure 25
Radiator Hose
(lower)

41.

Detach the Radiator Hose (lower) and
the Reservoir Tank Hose from the
Multi-way Control Valve.
Reservoir
Tank Hose
Figure 26

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ITB22-038B

The following Figures are of the passenger (RH) side AWD; driver (LH) side is similar.
HINT: 2WD is similar for steps 42-47.

42.

Raise the vehicle to a comfortable height, and then remove both front wheel
assemblies.

The following steps will be performed on
both passenger (RH) side and the driver
(LH) side.

43.

Brake caliper
assembly

Remove both front brake caliper
assemblies and rotors.

Brake rotor

HINT: Two (2) piston caliper shown in
Figure 27. Four (4) piston removal is
similar.
Figure 27

Brake hose
locator clip