Protective cover

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Mar 3, 2026
Page 5 of 11

8

Service
WSL3

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

Mar 3, 2026
Page 6 of 11

AfterSales

Service

Technical Information

2025

ENU

WSL3

8

Þ Potential equalisation line on
10 Unscrew the nut ⇒
electric passenger compartment heater -3- from the
Þ Potential equalisation line
potential equalisation line ⇒
on electric passenger compartment heater -2- on the
Þ Potential
electric passenger compartment heater ⇒
equalisation line on electric passenger compartment
heater -1- and remove the potential equalisation
Þ Potential equalisation line on electric passenger
line⇒
compartment heater -2-.

Potential equalisation 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

Mar 3, 2026
Page 7 of 11

8

Service
WSL3

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.

Mar 3, 2026
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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

WSL3

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 Activate high-voltage system.
⇒ Workshop Manual '277583A2 Deactivating and activating the high-voltage system'

AfterSales

Mar 3, 2026
Page 9 of 11

8

Service
WSL3

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).
21 Teach the electric passenger compartment heater.
⇒ Workshop Manual '828055 Replacing electric passenger compartment heater'
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 specified labor times were determined specifically for carrying out this campaign and include all of the
necessary preliminary and subsequent rework. The labor times 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
•

Partial emptying of the cooling system
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: 448 TU

Required parts:
PAD963507A

Electric passenger compartment heater

1 piece

Required materials (only if needed):
N 10737001

Mar 3, 2026
Page 10 of 11

Hexagon nut, self-locking

AfterSales

4 pieces

Service

Technical Information
00004330516

2025
Coolant additive (20-liter (5.28 gal) container)

ENU

WSL3

8

0.01 piece

Þ Damage number WSL3 066 000 2
⇒

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.

© 2026 Porsche Cars North America, Inc.

AfterSales

Mar 3, 2026
Page 11 of 11