Service

Technical Information

2025

ENU

WSS0

4

WSS0 - Checking the Return Line (PDCC) and Replacing if Necessary (Workshop Campaign)

Change
Overview:

Revision

Date

Change

0

02/04/2026

•

First publication

1

03/02/2026

•

Change to date in
assessment/action table
in work procedure

Model Year:

As of 2025 up to 2026

Vehicle Type:

911 Carrera GTS (992)
911 Carrera 4 GTS (992)
911 Turbo S (992)

Equipment:

Porsche Dynamic Chassis Control (PDCC) (M-No. 1P7)

Concerns:

Return line (PDCC)

Cause:

Due to a manufacturing error, there is a possibility that the return line of the PDCC system is leaking in the
area where it adjoins the PDCC pump on the affected vehicles.
This may lead to oil loss and consequently to the deactivation of the PDCC system. Deactivation is warned in
yellow on the instrument cluster; the vehicle remains ready to drive.

Information
The vehicle is still ready to drive with the yellow warning message and deactivated anti-roll stabilisation.
Action:

Check the return line (PDCC) and replace it if necessary.

Affected
Vehicles:

Only vehicles assigned to the Campaign (see also PCSS Vehicle Information).

AfterSales

Mar 2, 2026
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Service
WSS0

ENU

Technical Information

2025

Installation
Position:

1
2
3

Installation position of return line (PDCC)
– Return line (PDCC) (check and replace if necessary)
– (Rear) valve block
– Pump (PDCC)

Required parts as needed
Information
No parts are required for checking the return line (PDCC).
Parts Info:

Mar 2, 2026
Page 2 of 11

Part No.

Designation
– Location of use

Quantity

V04015010S

⇒ Return line
– PDCC system

1 piece

N 10517304

⇒ Cheese head bolt with multiple-tooth head,
self-locking M8 x 22
– Return line on pump (PDCC)

1 piece

AfterSales

Service

Technical Information
Material:

2025

ENU

WSS0

4

Required material (usually already available at the Porsche Centre)
Part No.

Designation
– Location of use

Quantity

00004330574

⇒ Hydraulic oil 1 liter/ 33.8 fl oz container
– PDCC system

2 pieces

Required tools as needed
Tools:

•
•

•
•
•
•
•
•
•
•
•
•
•

P90999 - Porsche Tester 4
Battery charger with a current rating of at least 90 A and a current and voltage-controlled charge map
for lithium starter batteries, e.g. VAS 5908 - battery charger 90 A. For further information about the
battery chargers to be used, see the corresponding Workshop Manual. ⇒ Workshop Manual '270689
Charge battery and vehicle electrical system'
Torque wrench, 2-10 Nm (1.5-7.5 ftlb.), e.g. V.A.G 1783 - torque wrench, 2-10 Nm (1.5-7.5 ftlb.)
Torque wrench, 6-50 Nm (4.5-37 ftlb.), e.g. V.A.G 1331A - torque wrench, 6-50 Nm (4.5-37 ftlb.)
VAS 6883A - Insulated tool set
VAS 6558B - High-voltage measuring module
VAS 6558A/50 - High-voltage measuring adapter set
VAS 6558A/27 - Set of Kelvin clamps and test probes
VAS 6410 - Contact surface cleaning set
T40262 - Locking cap
VAS 6544A - Filling equipment
VAS 6096/2 - Vacuum pump
P90101 - Loosening tool

or
•

VAS 6933 - Disassembly tool

Checking the return line (PDCC)
Work Procedure: 1
2

Remove rear cover.

⇒ Workshop Manual '519419A4 Removing and installing rear cover'
Þ Example illustration with production date 19.09.2025 -1- of the return
Check the production date ⇒
line (PDCC).

AfterSales

Mar 2, 2026
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Service
WSS0

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Technical Information

2025

Example illustration with production date 19.09.2025
Assessment
( )

The production date of the return line
(PDCC) is not 16/03/2025.

Action
The return line (PDCC) is OK.
Install the rear cover.
⇒ Workshop Manual '519419A4 Removing and
installing the rear cover'
Enter the campaign in the warranty and maintenance logbook.
End of action.
Invoicing for Scope 1.

✗)
(✗

The production date of the return line
(PDCC) is 16/03/2025.

The return line (PDCC) is not OK.
Continue with ⇒ Technical Information
'519419A4 Replacing the return line (PDCC)'.
Invoicing for Scope 2.

Replacing return line (PDCC)
WARNING
Corrosive fluids

Mar 2, 2026
Page 4 of 11

AfterSales

Service

Technical Information

2025

ENU

WSS0

4

•

Chemical burns

Þ
⇒

Wear personal protective equipment.

Þ
⇒

Ensure that there is good ventilation.

Þ
⇒

Avoid contact with corrosive fluid.

Þ
⇒

If you come into contact with it, wash off immediately with plenty of warm water and contact a doctor if necessary.
NOTICE

Aggressive fluids
•

Damage to components and surfaces

Þ
⇒

Do not spill fluids.

Þ
⇒

In case you touch it, wash the component or surface with water.

Þ
⇒

Replace components that are already damaged.

Information
•

Open connections and lines must be closed off using suitable stoppers or caps.