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Technical Information

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Replacing High-Voltage Battery on Model Year L (2020) Vehicles - Observe Specified
Procedure (48/21)

Information
This Technical Information (TI) contains two remedial measures, which relate to requirements for
replacing the high-voltage battery on Taycan model year L (2020) vehicles. The specified part numbers
for the high-voltage battery must be checked to determine whether both remedial measures must be
carried out or whether changing the PR number as described in the second part of the TI will be sufficient
if the high-voltage battery needs to be replaced.
If you are unclear about the scope of this Technical Information, please contact your importer's Technical
Support.
Model Line:

Taycan (Y1A)

Model Year:

2020

Concerns:

Replacing the high-voltage battery

Information:

New high-voltage batteries with a modified cell chemistry are used on Taycan vehicles from
model year M (2021) onwards. From now on, model year L (2020) vehicles will also be installed
with the new high-voltage batteries with modified cell chemistry if the high-voltage battery
needs to be replaced.
To ensure that the high-voltage battery with modified cell chemistry is compatible with the
vehicle, various additional measures are required depending on the part number of the new
high-voltage battery:
Part numbers with index AH/AX:

•

Part No.

Designation

9J1915100AH

High-voltage battery (complete), 93 kWh

9J1915100AX

High-voltage battery (complete), 93 kWh

9J1915099AH

High-voltage battery (complete), 79 kWh

9J1915099AX

High-voltage battery (complete), 79 kWh

Replace E-box  Technical Information 'Replacing E-box 'and change vehicle data  Technical
Information 'Changing PR number'.

Part numbers with index AM/PX:
Part No.

Designation

9J1915100AM

High-voltage battery (complete), 93 kWh

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9J1915100PX

High-voltage battery (complete), 93 kWh

9J1915099AM

High-voltage battery (complete), 79 kWh

9J1915099PX

High-voltage battery (complete), 79 kWh

Change vehicle data  Technical Information 'Changing PR number'.

•

Replacing E-box
Information:

Due to lack of regulatory approvals, before installing the high-voltage battery assembly (which
includes: E-box and high-voltage battery control unit), the E-box and high-voltage battery
control unit must be replaced with approved versions.

Action required: Replace E-box of the new high-voltage battery.
Parts Info:

Overview of affected part numbers:
Part No.

Designation

9J1915100AH

High-voltage battery (complete), 93 kWh

9J1915100AX

High-voltage battery (complete), 93 kWh

9J1915099AH

High-voltage battery (complete), 79 kWh

9J1915099AX

High-voltage battery (complete), 79 kWh

Parts required:

Work
Procedure:

Part No.

Designation
– Use

Qty.

9J1915251AA

 Battery disconnect element (complete)
Includes:
– High-voltage battery control unit

1 ea.

PAF009770

 Internal hexagon round-head bolt, M6 x 32
– Battery disconnect element

9 ea.

Replace E-box.
1

Position new high-voltage battery on the assembly table.

2

Remove old E-box  Workshop Manual '270819 Removing and installing E-box'.

3

Install new E-box (Part No. 9J1915251AA)  Workshop Manual '270819 Removing and installing
E-box'.
The new high-voltage battery with new E-box can then be installed in the vehicle.

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Invoicing:

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After installing the high-voltage battery and before programming the high-voltage battery control
unit, change the PR number in the vehicle order, see  Technical Information '270819 Introduction'.

For documentation and warranty invoicing, enter the labor operation, parts and PQIS coding specified
below in the warranty claim:

APOS

Labor operation

I No.

27081955

Removing and installing high-voltage battery
(removing and installing E-box)
PQIS coding:

Location (FES5)

27080

High-voltage battery

Damage type (SA4)

9735

Repair in accordance with PAG instructions

References:

Part No.

Designation

Qty.

9J1915251AA

Battery disconnect element (complete)

1 ea.

PAF009770

Internal hexagon round-head bolt, M6 x 32

9 ea.

 Workshop Manual '270819 Removing and installing E-box'

Changing PR number
Information:

To use the high-voltage batteries with modified cell chemistry in MY L (2020) vehicles, the
PR number in the vehicle order must be changed following installation in the vehicle before
programming the new high-voltage battery control unit and teaching the high-voltage battery.
The change ensures that the high-voltage battery control unit will be programmed using the
correct data record and that the correct parts will be referenced in the Porsche Spare Parts
Catalogue (PET) if the high-voltage battery or its components need to be replaced in the future.

Action required: After installing the new high-voltage battery in the vehicle and before programming the high-voltage
battery control unit, change the PR number in the vehicle order.
Parts Info:

Affected part numbers of the 93 kWh high-voltage battery:
Part No.

Designation

9J1915100AH

High-voltage battery (complete)

9J1915100AX

High-voltage battery (complete)

9J1915100AM

High-voltage battery (complete)

9J1915100PX

High-voltage battery (complete)

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Affected part numbers of the 79 kWh high-voltage battery:
Part No.

Designation

9J1915099AH

High-voltage battery (complete)

9J1915099AX

High-voltage battery (complete)

9J1915099AM

High-voltage battery (complete)

9J1915099PX

High-voltage battery (complete)

Tools:
Information
The Taycan (Y1A) is equipped as standard with a lithium starter battery.
Lithium starter batteries must only be charged using a suitable battery charger that has a current
and voltage-controlled charge map.
For further information about the battery chargers to be used, see  Workshop Manual '270689
Charging battery/vehicle electrical system'.
•

•
Work
Procedure:

Battery charger with a current rating of at least 90 A and - if required - also with a current- and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 90 A battery
charger
9900 - PIWIS Tester 3

Changing vehicle data
1

Connect a suitable battery charger, e.g. 90 A battery charger, to the jump-start terminals and
switch it on.

2

Position the driver's key with the back facing
forward upright between the holding struts in the rear
cupholder (emergency start tray) to guarantee a
permanent radio link between the vehicle and remote
control  Emergency start tray -Arrow-.

3

Connect 9900 - PIWIS Tester 3 to the vehicle
communication module (VCI) via the USB cable.
Then connect the communication module to the
vehicle and switch on the PIWIS Tester.

4

Establish operational readiness (switch on ignition).

5

On the PIWIS Tester start screen, call up the 'Diagnostics' application.

Emergency start tray

The vehicle type is then read out, the diagnostic application is started and the control unit selection
screen is populated.

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Change vehicle data.
6.1

In the control unit selection screen ('Overview' menu), press •F7“ to call up the Additional
menu.

6.2

Select 'Maintenance of vehicle data' and
press •F12“ ('Next') to confirm  Maintenance of vehicle data.

6.3

Press •F12“ ('Next') to skip the displays
containing information about vehicle
description, colors/materials and X numbers.

6.4

Add the coding value 'ST3' to the vehicle data
on the M numbers page. To do this, click in
the "Installed" field for the relevant coding
value to select the value.
Maintenance of vehicle data
Make sure that the 'Installed' column is then
ticked and that the pen symbol appears in the 'Changed' column.
Then press •F12“ ('Next') to exit the PR numbers display.

6.5

Press •F8“ in the overview that is then displayed to save the changed vehicle data.

6.6

Once you have saved the vehicle data, press •F11“ ('Back') to return to the control unit
selection screen.

The high-voltage battery control unit can now be programmed, see  Workshop Manual '270855
Replacing high-voltage battery'.
Invoicing:

For documentation and warranty invoicing, enter the labor operation and PQIS coding specified below in
the warranty claim:
I No.

APOS

Labor operation

27084950

Reworking high-voltage battery control unit
PQIS coding:

Location (FES5)

27080

High-voltage battery

Damage type (SA4)

9735

Repair in accordance with PAG instructions

References:

 Workshop Manual '270855 Replacing high-voltage battery'

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.

© 2021 Porsche Cars North America, Inc.

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