Service

Technical Information

2025

ENU

WSD8

8

WSD8 - Replace Electric Passenger Compartment Heater (Workshop Campaign)

Change
Overview:

Release

Date

Change

0

04/17/2025

•

Original publication

1

11/25/2025

•

Update to include Scope 2
along with corresponding
information throughout TI

2

12/15/2025

•

Removal of Scope 1
along with corresponding
information throughout TI

3

03/03/2026

•

Update to required parts
and materials

Model Year:

As of 2020 up to 2025

Model Line:

Taycan (Y1A/Y1B/Y1C)

Concerns:

Electric passenger compartment heater

Cause:

During ongoing quality analyses, it was determined that the optimized electric passenger compartment
heaters are failing (e.g. spare parts from campaign WPL8).
For this reason, we will regularly review existing FAPs (workshop and OTA FAPs) for active fault memory
entries for the electric passenger compartment heater. Flagged vehicles with the corresponding error code
for a defective passenger compartment heater are continuously being assigned to the present campaign.

Action:

Replace electric passenger compartment heater.
Information
As of calendar week 50/2025, partial draining of the coolant is approved for all Taycan models when
replacing the interior heater.
Therefore, all vehicles are assigned to scope 2. Scope 1 (complete emptying of the cooling system) is no
longer valid.

Affected
Vehicles:

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

AfterSales

Mar 3, 2026
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WSD8

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Technical Information

2025

Installation
Position:

Installation position
– (Replacing) electric passenger compartment heater

Required parts and materials
Parts Info:

Material:

Mar 3, 2026
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Part No.

Designation

Quantity

PAD963507A or
PAD963507B

⇒ Electric passenger compartment heater

1 piece

Only if required (usually already available in the Porsche Center):
Part No.

Designation

Quantity

N 10737001

⇒ Hexagon nut, self-locking

4 pieces

00004330516

⇒ Coolant additive, 20-liter (5.28 gal) container
– Cooling system

Quantity as required
(approx. 0.15 liters
(5.0 fl oz) required per
vehicle)

AfterSales

Service

Technical Information

2025

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WSD8

8

Required tools
•
•
•
•
•
•
•
•

VAS 6883A - Insulated tool set
VAS 6890 - Spring band clamp pliers
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.)
VAS 531 011 - Cooling system service equipment
3093 - Hose clamp
VAS 6675A - Funnel
Battery charger with a current rating of at least 90 A and - if required - also with a current and voltage
controlled charge characteristic for lithium starter batteries, e.g. 90 A battery charger
P90999 - Porsche Tester 4

Replacing electric passenger compartment heater
WARNING
Incorrect handling of high-voltage components
•

Electric shock

•

Short circuit

•

Fire

•

Explosion

Þ
⇒

Only appropriately trained and authorized persons are permitted to work on high-voltage vehicles and components.

Þ
⇒

Required qualification: High voltage technician or high voltage expert.

Þ
⇒

Observe national requirements and legislation for this work.

Þ
⇒

Always use insulated tools such as the insulated tool set when working on these parts.

Þ
⇒

Þ Workshop Manual '2X00INB5 General
Observe general warning notices for working on the high-voltage system. ⇒
warning notices for working on the high-voltage system'
WARNING

Hot fluid
•

Danger of scalding

Þ
⇒

Avoid contact with hot fluid.

Þ
⇒

Wear personal protective gear.
CAUTION

Hot components
•

Risk of burns

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Þ
⇒

Let hot components cool down.

Þ
⇒

Wear personal protective gear.

Information
•

Protect high-voltage plug connections from dampness.

•

Do not release high-voltage plug connections until you have opened the cooling system.

Information
Handling high-voltage lines:
•

Do not support yourself or your tools on high-voltage lines and their components.

•

Work involving metal-cutting, deforming and sharp-edged tools close to high-voltage components and
lines is prohibited.

•

Work involving heat sources such as welding, soldering, hot air and thermal bonding close to
high-voltage components and lines is prohibited.

•

High-voltage lines must not be extensively bent or kinked.

•

A visual inspection of the high-voltage connectors must be performed before installing the high-voltage
lines. If there are signs of damage to the connectors, contacts and gaskets, the high-voltage line must
be replaced.

•

If you have questions or if you are unclear about anything, consult the relevant high-voltage technician.

Work Procedure: 1
2
3
4

Deactivate the high-voltage system.

⇒ Workshop Manual '277583A2 Deactivating and activating the high-voltage system'
Remove the luggage compartment tray.
⇒ Workshop Manual '501919A1 Removing and installing the luggage compartment tray'
Loosen the front end fuse box.

⇒ Workshop Manual '978409A1 Loosening and fastening the front end fuse box'
Read the warning notices.

⇒ Workshop Manual '2X00INB4 General warning notices for working on the high-voltage vehicle electrical system'

Mar 3, 2026
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AfterSales

Service

Technical Information
5

2025

ENU

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8

Mark the current coolant level on the reservoir.

Reservoir
Information
Please note that only vehicles with equipment add-on
auxiliary heater (M No. 9M3) is a thermal insulation
Þ Thermal insulation (case) -1(case) additionally⇒
installed on the electric passenger compartment
heater. This must be converted from the old to the new
electric passenger compartment heater.

Thermal insulation (case)
6

Þ Protective cover -1-.
Remove the protective cover ⇒
6.1

Þ Protective cover -2-.
Unscrew nuts ⇒

6.2

Þ Protective cover -3-.
Unscrew screw ⇒

6.3