Service

Technical Information

2026

ENU

WTA5

8

WTA5 - Replacing Air-Conditioning Compressor and Dryer (Workshop Campaign)
Model Line:

Taycan (Y1A/Y1B/Y1C)

Model Year:

As of 2024 up to 2025

Concerns:

Air-conditioning compressor and dryer

Cause:

Due to production deviations, an electric air-conditioning compressor with insufficient thermal conductivity may have been installed on the affected vehicles.
If this is the case, the electric air-conditioning compressor may overheat and then switch off. As a result, the
air conditioning and passenger compartment heating are not available.

Action:

Replacing the air-conditioning compressor and dryer.

Affected
Vehicles:

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

Required parts
The part numbers of the required parts for the respective vehicle can be seen in the assigned scope, see
section "warranty processing".

Required tools
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
Charging the vehicle electrical system battery'
VAS 6122 - Engine plug set
VAS 6883 - Insulated tool set
VAS 6558A - High-voltage test adapter
VAS 6558A/27 - Set of Kelvin clamps and test probes
VAS 6558/9-6A - High-voltage test adapter
VAS 6558A/52 - High-voltage measurement adapter
VAS 6410 - Contact surface cleaning set
T40262 - Locking cap
VAS 6338/30A - Sealing caps
Pole terminal puller
3093 - Hose clamp
VAS 6675A - Funnel

AfterSales

Mar 17, 2026
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8

Service
WTA5

ENU

•
•

Technical Information

2026

VAS 531 011 - Cooling system service equipment
Air-conditioning service device recommended by Porsche for refrigerant R1234yf, e.g. VAS 581 001A
- Air-conditioning service device R1234yf
VAS 231 007A - Scale
VAS 6100 - Workshop crane
VAS 691 013 - Stop rod

•
•
•

Replacing the air-conditioning compressor and dryer
Work Procedure: 1
2

Deactivate the high-voltage system.
⇒ Workshop Manual '277583A2 Deactivating and activating the high-voltage system'
Replacing the air-conditioning compressor and dryer.

⇒ Workshop Manual '873455A1 Replacing electric air-conditioning compressor'

and
⇒ Workshop Manual '875555A1 Replace dryer'
3
4

Activate the high-voltage system.

⇒ Workshop Manual '277583A2 Deactivating and activating the high-voltage system'
Enter the campaign in the Warranty and Maintenance Logbook.

Warranty processing
Scope 1:

Replacing the air-conditioning compressor and dryer
•

Scope 2:

Not relevant for this vehicle type

Replacing the air-conditioning compressor and dryer
•

Valid for Taycan (Y1A/Y1B/Y1C)
Labor time:
Replacing the air-conditioning compressor and dryer
Includes:
Deactivating and activating high-voltage system
Draining and filling coolant (complete)
Removing and installing high-voltage distributor mounting
Removing and installing high-voltage converter/booster
Removing and installing dryer
Removing and installing electric air-conditioning compressor
Connecting and disconnecting battery charger
Read out and delete fault memory

Labor time: 1133 TU

Required parts:
V04015800EE

Mar 17, 2026
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Electric air-conditioning compressor

AfterSales

1 piece

Service

Technical Information

2026

ENU

95557374901

Round seal, 11X2.5

2 piece

9A757374903

O-ring, 16.25X2.5

1 piece

N 10737001

M6 hexagon nut, self-locking

7 piece

N 10261307

Hexagon nut, M10

2 piece

PAF912040

Hexagon-head bolt M8 X 50

4 piece

PAF106825

Cheese head bolt with multiple-tooth head
M8 X 50

4 piece

V04015007BC

Dryer

1 piece

95557374903

O-ring, 23.8 X 2.4

1 piece

Consumables
Includes:
– Refrigerant 1234yf
– Compressor oil 1234yf
– Coolant additive
– Brake fluid

1 piece

WTA5

8

Required materials:
WTA50000002*

*For invoicing the necessary material during the warranty processing, enter Part No. WTA50000002 with
the designation “Consumables” as an additional part costing $3.47 in the warranty claim.
Þ Damage number WTA5 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 17, 2026
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