Service

Technical Information

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ENU

8783

Replacement Requirement for Pressure Sensors for Refrigerant Circuit - Mixed Installation Not
Permitted (70/24)

8

Vehicle Type:

Panamera 4 E-Hybrid (971)/Panamera 4S E-Hybrid (971)

Model Year:

As of 2017 up to 2024

Concerns:

Refrigerant circuit pressure sensors

Cause:

Due to the discontinuation of an electronic component within the pressure sensor, the pressure sensors for
the refrigerant circuit have been switched to a changed component status.
The changed component status can be identified by a changed part number.
Pressure sensors that correspond to the changed component status are not compatible with the previous
pressure sensors.
If a pressure sensor is required for replacement, it must therefore be ensured that both pressure sensors in
the refrigerant circuit correspond to the changed component status (identical part number). If this is not the
case, the respective other pressure sensor must also be replaced as a one-off. Mixed installation of pressure
sensors with different component status (mixed installation) is not technically permissible and leads to faults
in the refrigerant circuit and in the air conditioning.

Overview
of Pressure
Sensors:

Part No.

Corresponds to the following
part identifier on the
component

Designation

PAB959603

4M0959603E

⇒ Pressure sensor for air-conditioning system (previous status, no
longer available)

4M0959603J

⇒ Pressure sensor for air
conditioning system (changed
status)

or
PAB959603B

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1

Service
8783

ENU

– Pressure sensor part identifier

Action:

Technical Information

70/24

Pressure sensor part identifier

If a pressure sensor must be replaced, ensure that both pressure sensors in the refrigerant circuit correspond
to the changed component status with the part identifier 4M0959603J.
If this is not the case, both pressure sensors must be replaced.

⇒ Workshop Manual '878319 Remove and install pressure sensor (PT1 and PT2)'

Apr 22, 2025
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Service

Technical Information

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ENU

8783

8

Installation
Position:

1
2

– Pressure sensor (PT2) on low-pressure side
– Pressure sensor (PT1) on high-pressure side

Installation position

Labor position and PCSS encryption Labor position:
APOS

Labor operation

I No.

87831915

Remove and install refrigerant circuit pressure
sensor

87831916

Remove and install refrigerant circuit pressure
sensor

87831918

Remove and install refrigerant circuit pressure
sensor

87831919

Remove and install refrigerant circuit pressure
sensor

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Technical Information

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PCSS encryption:
Location (FES5)

87830

Pressure sensor for refrigerant circuit

Damage type (SA4)

9744

Part not available

Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are
written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in
order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and
may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins
are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester
are the ones that must be followed.

© 2025 Porsche Cars North America, Inc.

Apr 22, 2025
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