ITB20-003

Classification:
Reference:
Date:
WT20-001
ITB20-003
February 10, 2020
2014-2020 Q50 AND 2017-2020 Q60; TPMS SENSOR LEAKING AIR
APPLIED VEHICLES:
2014-2020 Q50 (C37)
2017-2020 Q60 (CV37)
APPLIED DATE:
Built before December 26, 2019
IF YOU CONFIRM
The vehicle has the original equipment wheels and TPMS sensors (tire pressure sensors) installed.
AND
The owner states that one or more tires has a continuous air leak or looses air pressure multiple times over a
30 day period (approximatively 1 psi every 3 days).
NOTE: The TPMS warning lamp may be ON (not flashing) with one or more of the following DTCs stored:

C1704, C1705, C1706, C1707, C1730, C1731, C1732, C1733

If the TPMS warning lamp is flashing for more than one (1) minute this bulletin does not apply. Refer
to the Electronic Service Manual (ESM) for further diagnostic information.
ACTION
1. Confirm that air is leaking between the tire pressure sensor’s valve stem and valve nut of the affected
wheel/tire.
2. Replace the valve stem washer/seal and the valve nut and then torque to the new specification.
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.
Adjust the tire pressure to 35 psi on the affected wheel/tire.
2.
Apply a mixture of soap and water to the area
shown in Figure 1.
3.
Visually inspect for bubbles in the area
between the valve stem and the valve nut.
4.
5.
Bubbles

If bubbles were found in the area shown in
Figure 1, proceed to step 4.

If no bubbles were found, this bulletin does
not apply. Further inspection may be
necessary to locate a wheel/tire leak that
is not covered by this bulletin.
Remove the affected tire pressure sensor from
the wheel.
See the PARTS INFORAMTION on
page 3.
Valve stem washer/seal lip
damage may occur if the valve stem seal is
not centered in the wheel. Take care to
center the valve stem when installing into the
wheel (see Figure 2).
6.
Valve nut
Lip damage
can occur here
Valve stem
washer/seal
Replace the valve stem washer/seal.

Figure 1
Apply soapy
water to this
area
Tire pressure
sensor
Figure 2
Reinstall the tire pressure sensor into the wheel with a new valve nut from the PARTS INFORAMTION
on page 3, and then torque to the new specification below.

Valve nut torque: 10 N•m ±0.5 (1.02 kg-m, 88.5 in-lb)
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ITB20-003
PARTS INFORMATION
(1)
(2)
DESCRIPTION
PART NUMBER
QUANTITY
Washer/Seal (1)
40702 or 40708 (2)
1 per sensor
Valve Nut
40780-JA02A
1 per sensor
Single-use part.
Refer to the electronic part catalog and reference the VIN for the vehicle specific part number.
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
Replace Tire Pressure Sensor Seal
Each Additional Sensor Seal
(1)
(2)
(1)
OP CODE
PW25AA
PW251A
SYM
DIA
FRT
ZT
53
(2)
Reference the electronic parts catalog and use the Tire Pressure Sensor (40708-*****) 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
February 10, 2020
ITB20-003
DESCRIPTION
Original bulletin published
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ITB20-003