Service

Technical Information

133/24 ENU WRM9

4

WRM9 – Checking Brake Lines and Replacing if necessary (Workshop Campaign)
Model Line:

Panamera (YAA / YAB)

Model Year:

As of 2024

Concerns:

Brake lines hydraulic unit

Cause:

On the affected vehicles, there is a possibility that the coating of the brake lines between the hydraulic unit
and the brake master cylinder was damaged during the production run of the vehicle.
This can lead to surface corrosion of the brake lines over the service life.

Action:

Check the brake lines between the hydraulic unit and brake master cylinder and replace if necessary.

Affected
Vehicles:

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

Installation
Position:

Installation position of brake lines (left-hand drive)

AfterSales

Dec 11, 2024
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4

Service

Technical Information

ENU 133/24

WRM9

Installation position of brake lines (right-hand drive)

Required parts and materials
The part numbers of the parts and materials required for the respective vehicle can be seen in the assigned
scope. For an overview of the campaign scopes, see: ⇒ Technical Information 'Warranty processing'
For materials (lubricants) required for carrying out the action, see the corresponding Workshop Manual in
PCSS. These lubricants are usually available in the Porsche Center.

Required tools
Tools:

Required tools for vehicles with hybrid drive system PHEV (M-no. 0K3):
•
•
•
•
•

T40262 - Locking cap
VAS 6410 - Contact surface cleaning set
VAS 6558A - High-voltage measuring module
VAS 6558A/51 - High-voltage measurement adapter
VAS 6883A - Insulated tool set

Additionally required tools if brake lines must be replaced:
•
•
•

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Torque wrench, 0.4 – 2 Nm (0.3-1.5 ftlb.), e.g.VAS 6253A - torque wrench, 0.4-2 Nm (0.3-1.5 ftlb.)
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.)

AfterSales

Service

Technical Information
•
•
•
•
•
•
•
•
•

133/24 ENU WRM9

4

Torque wrench 40 – 200 Nm (30–148 ftlb.), e.g. V.A.G 1332A - torque wrench 40-200 Nm
(30–148 ftlb.)
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 - battery charger 90 A
P90999 - PIWIS Tester 4
VAS 6935 - Pole terminal puller
9897 - Release tool
VAS 6860 - Brake Filling and Bleeding Equipment
3093 - Hose clamp
VAS 6890 - Spring band clamp pliers
VAS 531 011 - Cooling system service equipment

Preparatory work
Work Procedure: 1

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)
Carry out deactivation of high-voltage system. ⇒ Workshop Manual '277583 Deactivating / starting up
high-voltage system'

2

Remove front trim panel (engine compartment) at the left. ⇒ Workshop Manual '700219 Remove and
install the front trim panel (engine compartment)'

Checking brake lines
Work Procedure: 1

Check brake lines for damage to the coating.
Assessment
( )

The brake line coating is not damaged.

Action
End of action.
Continue with Step ⇒ 2.
[Invoicing: Scope 1 or Scope 2].

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Technical Information

ENU 133/24

WRM9

✗)
(✗

The coating of one or both brake lines is damaged. Replacing affected brake line
Continue with
⇒ Technical Information '700219
Replacing brake lines (left-hand drive)'
or
⇒ Technical Information '700219
Replacing brake lines (right-hand drive)'
[Invoicing: Scope 3 to Scope 12].

Check brake line coating
2

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)
Start the high-voltage system. ⇒ Workshop Manual '277583 Deactivating / starting up high-voltage
system'

3

Installing front trim panel (engine compartment) at the left. ⇒ Workshop Manual '700219 Remove and
install the front trim panel (engine compartment)'

4

Enter the campaign in the Warranty and Maintenance Logbook.

Replacing brake lines (left-hand drive)
Work procedure: 1

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)
Remove electric passenger compartment heater. ⇒ Workshop Manual '828019 Removing and
installing electric passenger compartment heater'

2

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)

Þ Electric passenger compartment heater bracket -1-.
Remove electric passenger compartment heater ⇒

Dec 11, 2024
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AfterSales

Service

Technical Information

133/24 ENU WRM9

4

Electric passenger compartment heater bracket
2.1

Þ Electric passenger compartment heater bracket -2-.
Unclip clips ⇒

2.2

Þ Electric passenger compartment heater bracket -3- through the wheel
Unscrew screw ⇒
housing.

2.3

Þ Electric passenger compartment heater bracket -4-.
Unscrew screw ⇒

3

Remove dome strut and side strut at the left. ⇒ Workshop Manual '408619 Removing and installing
strut (dome strut)'

4

Remove cover. ⇒ Workshop Manual '108319 Removing and installing engine cover'

5

Remove brake booster. ⇒ Workshop Manual '477019 Removing and installing brake booster'

6

Þ Replacing damaged brake line -1-.
Replace damaged brake lines ⇒

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Service

Technical Information

ENU 133/24

WRM9

Replacing damaged brake line
6.1

Þ Replacing damaged brake line -2- union nuts, collect leaking brake fluid and close
Unscrew ⇒
connections on the hydraulic unit with suitable stoppers.

6.2

Þ Replacing damaged brake line -1- from line brackets ⇒
Þ
Unclip damaged brake lines ⇒
Replacing damaged brake line -3-.

6.3

Þ Replacing damaged brake line -4- in ⇒
Þ Replacing damaged brake line
Unclip grommet ⇒
-Arrow direction-.

6.4

Þ Replacing damaged brake line -1- of engine compartment.
Guide damaged brake lines out ⇒

6.5

Þ Replacing damaged brake line -1-.
Position new brake lines ⇒

6.6

Remove the stopper.

6.7

Þ Replacing damaged brake line -2- in union nuts and tighten with with tightening
Screw ⇒
torque 18 Nm.

6.8

Þ Replacing damaged brake line -3- in the opposite direction ⇒
Þ Replacing
Clip in the grommet ⇒
damaged brake line -Arrow direction-.

6.9

Þ Replacing damaged brake line -1- into line bracket ⇒
Þ Replacing damaged
Clip brake lines ⇒
brake line -3-.

Replacing brake lines (right-hand drive)
1

Dec 11, 2024
Page 6 of 21

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)

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Service

Technical Information

133/24 ENU WRM9

4

Remove electric passenger compartment heater. ⇒ Workshop Manual '828019 Removing and
installing electric passenger compartment heater'
2

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)

Þ Electric passenger compartment heater
Remove electric passenger compartment heater bracket ⇒
bracket -1-.

Electric passenger compartment heater bracket
2.1

Þ Electric passenger compartment heater bracket -2-.
Unclip clips ⇒

2.2

Þ Electric passenger compartment heater bracket -3- through the wheel
Unscrew screw ⇒
housing.

2.3

Þ Electric passenger compartment heater bracket -4-.
Unscrew screw ⇒

3

Remove dome strut and side strut at the left. ⇒ Workshop Manual '408619 Removing and installing
strut (dome strut)'

4

Remove cover. ⇒ Workshop Manual '108319 Removing and installing engine cover'

5

Expose brake lines.

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Technical Information

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WRM9

Expose brake lines
5.1
6

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Þ Expose brake lines -1- and set aside noise insulation ⇒
Þ Expose brake lines -2Unclip clips ⇒
until brake lines become accessible.

Þ Replacing damaged brake lines -1-.
Replace damaged brake lines ⇒

AfterSales

Service

Technical Information

133/24 ENU WRM9

4

Replacing damaged brake lines

7

6.1

Þ Replacing damaged brake lines -2 and 3- union nuts, collect leaking brake fluid and
Unscrew ⇒
close connections on the hydraulic unit and brake master cylinder with suitable stoppers.

6.2

Þ Replacing damaged brake lines -1- from line brackets ⇒
Þ
Unclip damaged brake lines ⇒
Replacing damaged brake lines -4-.

6.3

Þ Replacing damaged brake lines -1- of engine compartment.
Guide damaged brake lines out ⇒

6.4

Þ Replacing damaged brake lines -1-.
Position new brake lines ⇒

6.5

Remove the stopper.

6.6

Þ -2- in union nuts and tighten with with tightening torque 18 Nm.
Screw ⇒

6.7

Þ Replacing damaged brake lines -1- into line bracket ⇒
Þ Replacing damaged
Clip brake lines ⇒
brake lines -4-.

Þ Secure brake lines -2- and clip in the clips ⇒
Þ Secure brake lines -1-.
Position noise insulation ⇒

AfterSales

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Technical Information

ENU 133/24

WRM9

Secure brake lines

Follow-up actions
Work Procedure: 1

Bleed the brake system. ⇒ Workshop Manual '470107 Bleeding brake system'

2

Install cover. ⇒ Workshop Manual '108319 Removing and installing engine cover'

3

Install dome strut and side strut at the left. ⇒ Workshop Manual '408619 Removing and installing strut
(dome strut)'

4

Only for vehicles with PHEV hybrid drive system (M-no. 0K3)
Start the high-voltage system. ⇒ Workshop Manual '277583 Deactivating / starting up high-voltage
system'

Dec 11, 2024
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5

Installing front trim panel (engine compartment) at the left. ⇒ Workshop Manual '700219 Remove and
install the front trim panel (engine compartment)'

6

Enter the campaign in the Warranty and Maintenance Logbook.

AfterSales

Service

Technical Information

133/24 ENU WRM9

4

Warranty processing
Information
The specified labor times were determined specifically for carrying out this campaign and include all
necessary preliminary and subsequent rework. The labor time may differ from the labor time published in the
Labor Operation List in PCSS.
Scope 1:

Checking brake lines
Valid for left-hand drive vehicles (M-no. L0L) and right-hand drive vehicles (M-no. L0R) with the following
equipment:
•

without alternative drive system (M-no. 0K0)
Labor time:
Checking brake lines
Includes:
Remove and install the left front trim panel (engine
compartment)