NHTSA ID Number: 11029146
Manufacturer Communication Number: No. 15-25
TSB/Document Date: 2026-03-02
Summary
Installation and conversion instructions on PCCB Taycan Retrofit
Taycan (Y1A)
Installation and Conversion Instructions
15 / 25 ENU
4601
4
PCCB Taycan Retrofit
Vehicle Type:
Taycan
Model Year:
As of 2020
Exception:
Not approved for J1 basic
Restrictions:
Only in conjunction with 20-inch wheel rims
Part Info:
9J1.044.600.00
Information
Please pass all this information on to the customer.
Also give the customer a copy of the first pages of these Installation and Conversion Instructions, including
the legal regulations.
Work procedure: Front axle:
1
Charge the vehicle electrical system battery ⇒ Workshop Manual 'Charging 12-volt lithium-ion vehicle
electrical system battery'.
2
Remove front axle brake calliper ⇒ Workshop Manual 'Removing and installing the front brake calliper'.
3
Replace brake line section (brake calliper to connection point) on the left and right.
Attention, all brake hoses are present in the set, observe part number according to derivative:
Part number
Use
9J1.611.707 K
Brake hose
for ST
9J1.611.708 K
Brake hose for ST
9J1.611.707 E
Brake hose, CUV
9J1.611.708 E
Brake hose, CUV
4
Replace front axle brake pads ⇒ Workshop Manual 'Removing and installing front PCCB brake disc'.
5
Replace front axle brake discs ⇒ Workshop Manual 'Removing and installing front PCCB brake disc'.
6
Install front axle brake calliper ⇒ Workshop Manual 'Removing and installing front brake calliper'.
Tequipment
Feb 12, 2026
Page 1 of 4
4
Taycan (Y1A)
4601
ENU
Installation and Conversion Instructions
15/25
Rear axle:
7
Remove rear axle brake calliper ⇒ Workshop Manual 'Removing and installing rear brake calliper'.
8
Replace brake line section (brake calliper to connection point) on the left and right.
Attention, all brake hoses are present in the set, observe part number according to derivative:
9
Part number
Use
9J1.611.797 E
Brake hose holder semi-active chassis ST
9J1.611.798 E
Brake hose holder semi-active chassis ST
9J1.611.797 F
Brake hose holder for all active chassis or CUV
with semi-active chassis
9J1.611.798 F
Brake hose holder for all active chassis or CUV
with semi-active chassis
Replace rear axle brake pads ⇒ Workshop Manual 'Replacing rear PCCB brake pads'.
10 Replace rear brake discs ⇒ Workshop Manual 'Removing and installing rear PCCB brake discs'.
11 Install rear axle brake calliper ⇒ Workshop Manual 'Removing and installing rear brake calliper'.
Install steering wheel blocking mass:
12 The steering wheel blocking mass is located on the steering bar in the passenger compartment
(footwell on driver side). Install steering wheel blocking mass as shown. Pay attention to the groove at
the top and bottom. Steering wheel blocking mass must not be tilted.
Feb 12, 2026
Page 2 of 4
Tequipment
Installation and Conversion Instructions
Taycan (Y1A)
15 / 25 ENU
4601
4
Steering wheel blocking mass assembly
Ventilating brake system/coding I-number:
13 Bleed the brake system ⇒ Workshop Manual 'Bleed the brake system'
14 Code the vehicle.
The PIWIS Tester 4 cable MUST be connected to the vehicle for programming.
NOTICE
Voltage drop
•
Irreparable damage to control unit
•
Damage to control unit
•
Fault entries in control unit
•
Control unit programming/coding is aborted
•
Malfunctions in control unit, even during programming/coding
Þ
⇒
Switch off ignition before disconnecting the control unit.
Þ
⇒
Make sure that the power supply is not interrupted during programming/coding.
Þ
⇒
Connect the battery charger with at least Current 90 A to the vehicle battery.
14.1
P90999 - PIWIS Tester 4 must be connected and the ignition switched on.
14.2
Select “Diagnostics”. P90999 - PIWIS Tester 4 detects the model range.
Press Next. PIWIS Tester 4Diagnostics starts.
14.3
Maintenance of vehicle data.
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Feb 12, 2026
Page 3 of 4
4
Taycan (Y1A)
4601
ENU
Installation and Conversion Instructions
15/25
14.3.1
Select Additional menu by pressing •F7“. The question “Create vehicle analysis log
(VAL)?” appears. Press •F11“ to confirm.
14.3.2
Select the Maintenance of vehicle data function. Press •F12“ until PR numbers
appear in the Value group column.
14.3.3
Select Front brake version in the Family column. Touching the cell behind Front brake
version opens the drop-down menu.
Select 1LQ.
Press •F12“ to change values.
14.3.4
Select Rear brake version in the Family column. Touching the cell behind Rear brake
version opens the drop-down menu.
Select 2EC.
Press •F12“ to change values.
14.3.5
The selected values appear. Press •F8“ to write values. Wait until the following
message appears: Generation of vehicle data is complete. With ......
Press •F11“ to switch to the control unit overview.
14.4
Adapt coding.
14.4.1
Select all control units by pressing •Ctrl A“. Press •F12“ to continue.
14.4.2
Switch to the Coding/programming menu. Press •F12“ to continue.
Select Automatic coding mode. Press •F12“ to continue.
14.4.3
Wait until the following message appears: Coding was completed successfully. Press
•F12“ to continue.
Press •F12“ to return to the Overview menu.
46003200:
14.5
Switch off the ignition and disconnect P90999 - PIWIS Tester 4.
14.6
Disconnect the battery charger.
Replace 8 disc brake pads and 4 brake discs (front and rear); replace 4 brake
callipers
Includes:
Raise the vehicle, remove and install the wheels and bleed the
brake system.
Labor time: 370 TU
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.
Feb 12, 2026
Page 4 of 4
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TSB/Document ID: No. 15-25
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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