No. WSD8 Service Campaign

Protective cover
AfterSales
Dec 15, 2025

Page 5 of 11
8
Service

WSD8
ENU
7
Technical Information
2025
Disconnect the coolant hoses as close as possible to

the coolant connection piece for the electric passenger

compartment heater using commercially available hose

clamps⇒ Coolant hoses.
Coolant hoses

8
Þ Coolant hoses on the

Disconnect the coolant hoses ⇒

electric passenger compartment heater -2- from the

Þ Coolant

electric passenger compartment heater ⇒

hoses on the electric passenger compartment heater

-1-.

8.1
Position suitable collection tank and cloths for

leaking coolant and ensure that no coolant can

reach the electrical contacts.
8.2
Þ Coolant hoses

Loosen spring band clamps⇒

on the electric passenger compartment heater

-3-.
8.3
8.4

9
Coolant hoses on the electric passenger

Þ Coolant hoses

Disconnect the coolant hoses ⇒

compartment heater

on the electric passenger compartment heater

-2- and close them off immediately using suitable stoppers.
Þ Coolant

Close off the connection openings on the electric passenger compartment heater ⇒

hoses on the electric passenger compartment heater -1- using suitable stoppers.
Release and disconnect the electric plug connections

Þ Connector bracket on body -1and pull the bracket ⇒

Þ Connector bracket on body -Arrow-.

off the body ⇒
Connector bracket on body
Dec 15, 2025

Page 6 of 11
AfterSales
Service
Technical Information
2025
ENU
WSD8
8
Þ Potential equalization line on

10 Unscrew the nut ⇒

electric passenger compartment heater -3- from the

Þ Potential equalization line

potential equalization line ⇒

on electric passenger compartment heater -2- on the

Þ Potential

electric passenger compartment heater ⇒

equalization line on electric passenger compartment

heater -1- and remove the potential equalization

Þ Potential equalization line on electric passenger

line⇒

compartment heater -2-.
Potential equalization line on electric

passenger compartment heater
Þ Electric

11 Unlock and pull off electric plug connection ⇒

plug connection for electric passenger compartment

heater -2-.
Electric plug connection for electric

passenger compartment heater

12 Release and disconnect high-voltage plug connection

Þ High-voltage connection for electric passenger

⇒

compartment heater -2-.
High-voltage connection for electric

passenger compartment heater
AfterSales
Dec 15, 2025

Page 7 of 11
8
Service

WSD8
ENU
Technical Information
2025
Þ Reservoir on body -1-.

13 Loosen the reservoir ⇒

13.1
Þ Reservoir on body -3-.

Unscrew nuts ⇒
13.2
Þ Reservoir on body -1- to the

Turn reservoir ⇒

Þ Reservoir on body -Arrow-until nut

side ⇒

Þ Reservoir on body -4- accessible.

becomes ⇒
Reservoir on body
Þ

14 Remove the electric passenger compartment heater ⇒

Electric passenger compartment heater on body -1-.

14.1
Þ

Remove nuts and one screw (center left) ⇒

Electric passenger compartment heater on

body -3- from the bracket.

Þ Electric passenger compartment

The nuts ⇒

heater on body -3- must be replaced.
14.2
Remove the electric passenger compartment

Þ Electric passenger compartment

heater ⇒

heater on body -1-.
15 Pre-fill the new electric passenger compartment heater

with new coolant.
Dec 15, 2025

Page 8 of 11
Electric passenger compartment

heater on body
15.1
Fill 250 ml of coolant (filling volume of electric passenger compartment heater) into a

measuring cup.
15.2
Use a funnel to fill coolant into the vertical

electric passenger compartment heater.

Fill coolant in both connection pieces.

⇒ Electric passenger compartment heater
15.3
Close off the connection pieces using stoppers.
15.4
Slowly tilt the electric passenger compartment

heater in all directions one after the other to

remove any remaining air bubbles from the

electric passenger compartment heater.
15.5
Remove the stoppers and check the coolant

level in the electric passenger compartment

heater.
AfterSales
Electric passenger compartment heater
Service
Technical Information
2025
ENU
WSD8
8
15.6
Repeat work steps 15.2 to 15.5 until the electric passenger compartment heater is completely

filled with coolant.
15.7
Close off the connection pieces using stoppers.
16 Install in reverse order, paying particular attention to the following:

Information

During assembly of the pre-filled electric passenger compartment heater, make sure that as little

coolant as possible leaks.

High loss of coolant has a negative effect on the subsequent activities.
Information

If the bulkhead has been replaced, the studs fastening the electric passenger compartment heater

holder are replaced by welded nuts.

In this case, tighten screws (see PET) to the same tightening torque (as for nuts used previously).

16.1
Tighten nut for equipotential bonding line with Tightening torque 8 Nm (5.9 ftlb.).
16.2
Tighten new nuts in electric passenger compartment heater with Tightening torque 8 Nm (5.9

ftlb.).
16.3
Tighten screw on electric passenger compartment heater with Tightening torque 8 Nm (5.9

ftlb.).
16.4
Tighten screw and nuts on protective cover with Tightening torque 8 Nm (5.9 ftlb.) .
16.5
Tighten nut for reservoir with Tightening torque 8 Nm (5.9 ftlb.).
17 Secure the front end fuse box.

⇒ Workshop Manual '978409A1 Loosening and fastening the front end fuse box'

18 Perform the "Bleeding the cooling system" tester routine twice in succession (without draining and

filling coolant beforehand).

⇒ Workshop Manual '190107A5 Bleeding the cooling system'

19 Add coolant to the reservoir up to the marking (see removal, action step ⇒ 5).

If more than 150 ml of coolant must be refilled, further activities are required.

For this purpose, log in with a PRMS ticket to the PAG_Campaign_TI_SY_Support group for further

instructions.

20 Teach the electric passenger compartment heater.

⇒ Workshop Manual '828055 Replacing electric passenger compartment heater'

21 Activate high-voltage system.

⇒ Workshop Manual '277583A2 Deactivating and activating the high-voltage system'
AfterSales
Dec 15, 2025

Page 9 of 11
8
Service

WSD8
ENU
Technical Information
2025
Information

For the technical information for the new electric passenger compartment heater to be back-documented

correctly, the Porsche Tester must be logged in online and in the Porsche Partner Network (PPN).

22 Install the luggage compartment tray.

⇒ Workshop Manual '501919A1 Removing and installing the luggage compartment tray'

23 Enter the campaign in the warranty and maintenance logbook.
Warranty processing

Information

The stated labor time was determined specifically for carrying out this campaign and includes all necessary

preliminary work and rework. The labor time can differ from the labor time published in the Labor Operation

List in the PCSS.

Scope 1:
Not valid.
Scope 2:
Replacing electric passenger compartment heater

Labor time:

Replacing electric passenger compartment heater

Includes:

Deactivating and activating high-voltage system

Bleeding the cooling system

Removing and installing the luggage compartment tray

Removing and installing front cover

Loosening and fastening the front end fuse box

Loosening and fastening ground strap for battery
Labor time: 432 TU
Required parts:

PAD963507A or

PAD963507B
Electric passenger compartment heater
1 piece
N 10737001
Hexagon nut, self-locking
3 pieces
Required materials (only if needed):

00004330516
Coolant additive (20-liter (5.28 gal) container)
⇒ Damage number WSD8 066 000 2
Dec 15, 2025

Page 10 of 11
AfterSales
0.01 piece
Service
Technical Information
2025
ENU
WSD8
8
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.
AfterSales
Dec 15, 2025

Page 11 of 11

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Last update on 2026-03-27 / Affiliate links / Images from Amazon Product Advertising API

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