Service

Technical Information

84/21

ENU

AMB2

4

AMB2 – Replacing Lower Trailing Arm on Front Axle (Stop Delivery/Recall Campaign)

Revision:

This bulletin replaces bulletin Group 4 84/21 AMB2 (Y1A), dated June 22, 2021.

Model Year:

2021

Vehicle Type:

Taycan (Y1A)

Concerns:

Trailing arm on front axle, lower right

Information:

There is a possibility that trailing arms that do not meet the required specifications were
installed on the lower right of the front axle on the affected vehicles.
If this is the case, there is a possibility that the lower trailing arm can break. As a result, we cannot rule out
the possibility of impaired vehicle handling and possible loss of control of the vehicle.

Action required: Replace trailing arm on front axle, lower right.
Affected
Vehicles:

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

Required parts and materials
Parts Info:

Part No.

Designation
– Use

Qty.

V04015006N

 Front axle trailing arm, lower right

1 ea.

PAF108544

 Oval-head screw, M12 x 1.5 x 90
– Spring strut to lower trailing arm

1 ea.

PAF909664

 Hexagon collar nut, M12 x 1.5
– Spring strut to lower trailing arm

1 ea.

Additional parts required if the camber on the front axle must be corrected during suspension
alignment:
Information
The camber on the front axle cannot be adjusted, but must be centered evenly within the tolerance
range by moving the front-axle carrier.

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Materials:

ENU

Technical Information

84/21

Part No.

Designation
– Use

Qty.

N 91244301

 Hexagon flange bolt M12 x 1.5 x 90
– Front-axle carrier to body

6 ea.

Required materials (usually already available in the Porsche Centre):
Part No.

Designation

Qty.

00004330508

 Mounting paste
– Wheel centring surface to wheel hub

Stop Delivery/Recall
campaign

Required tools
Tools:

•
•
•
•
•
•
•
•
•
•
•
•
•

Suitable transmission and engine jack, e.g. VAS 6931 Engine and gearbox jack
T10187 - Press-out tool
VAS 6826 Steering wheel alignment gauge
VAS 6918 Quick-clamping unit
P90009 - P90009 - Puller
VAS 261 019 - Ratchet ring wrench socket, a/f 19
T90009 - T90009 - Insert tool
Torque/torque angle wrench, 20 – 400 Nm (15 – 296 ftlb.), e.g. VAS 6942 Digital torque
wrench, 20 – 400 Nm (15 – 296 ftlb.)
Torque screwdriver, 1.5 – 3 Nm (1 – 2 ftlb.), e.g. VAS 6494 Torque screwdriver, 1.5 – 3.0 Nm (1
– 2 ftlb.)
Torque wrench, 2 – 10 Nm (1.5 – 7.5 ftlb.), e.g. VAG 1783 Torque wrench, 2 - 10 Nm (1.5 - 7.5
ftlb.)
Torque wrench, 40 – 200 Nm (30 – 148 ftlb.), e.g. VAG 1332 Torque wrench, 40 – 200 Nm (30
– 148 ftlb.)
9900 - PIWIS Tester 3
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 Battery charger 90A

Additional tools required for calibrating the driver assistance systems:
•
•
•
•

Adjustment device with reflector
ACC reflector mirror
Lane Departure Warning Calibration Plate
VAS 6350A - Calibration unit

Replacing trailing arm on front axle, lower right
Work Procedure: 1
2

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Move the vehicle onto a lifting platform and raise it.  Workshop Manual '4X00IN Lifting the vehicle'
Remove right front wheel.  Workshop Manual '440519 Removing and installing wheel'

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3

Remove front right wheel housing liner.  Workshop Manual '505619 Removing and installing front
wheel housing liner'

4

Remove front section of wheel housing liner on the right.  Workshop Manual '50561903 Removing
and installing front wheel housing liner (front section)'

5

Remove front underbody cover.  Workshop Manual '519219 Removing and installing front
underbody cover'

6

Loosen condenser.
For instructions, see:  Workshop Manual '875019 Removing and installing condenser'

7

Loosen the front spring strut or air-spring strut on the lower trailing arm.
For instructions see:
 Workshop Manual '408519 Removing and installing front spring strut'
 Workshop Manual '433019 Removing and installing front air-spring strut'

8

Replace lower trailing arm on front axle.  Workshop Manual '401719 Removing and installing
lower trailing arm'

9

Secure the front spring strut or air-spring strut on the lower trailing arm.
For instructions see:
 Workshop Manual '408519 Removing and installing front spring strut'
 Workshop Manual '433019 Removing and installing front air-spring strut'

10 Secure condenser.
For instructions, see:  Workshop Manual '875019 Removing and installing condenser'
11 Install front underbody cover.  Workshop Manual '519219 Removing and installing front
underbody cover'
12 Install front section of wheel housing liner on the right.  Workshop Manual '50561903 Removing
and installing front wheel housing liner (front section)'
13 Install front wheel housing liner on the right.  Workshop Manual '505619 Removing and installing
front wheel housing liner'
14 Install right front wheel.  Workshop Manual '440519 Removing and installing wheel'
15 Lower the vehicle and remove it from the lifting platform.
16 Perform suspension alignment and adjust the vehicle.

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Information
The camber on the front axle cannot be adjusted, but must be centered evenly within the
tolerance range by moving the front-axle carrier.
If the camber on the front axle must be adjusted, first adjust the front-axle carrier and screw it to the
body using the old fastening screws and then replace all relevant fastening screws one after
the other with new screws.
For instructions, see:
 Workshop Manual '449503 Performing front and rear suspension alignment'
 Workshop Manual '4495TW Adjustment values for suspension alignment'
17 After correcting the wheel alignment values, carry out the following required subsequent work.
17.1

Calibrate steering-angle sensor.  Workshop Manual '456005 Initialising and calibrating
steering-angle sensor'

17.2

Teach power-steering gear.  Workshop Manual '489025 Teaching power-steering gear'
Information
The front camera and driver assistance systems must only be calibrated if the axle geometry
needs to be adjusted during suspension measurement.

17.3

Calibrate front camera.
For instructions see:  Workshop Manual '963855 Replacing front camera'

17.4

If installed: Calibrate control unit for distance measuring sensor (ACC).
For instructions, see:  Workshop Manual '278515 Adjusting control unit for distance
measuring sensor'

17.5

If installed: Calibrate infrared camera.
For instructions see:  Workshop Manual '908055 Replacing camera for night vision
system'

18 Enter the campaign in the Warranty and Maintenance booklet.
References:

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 Workshop Manual '408519 Removing and installing front spring strut'
 Workshop Manual '433019 Removing and installing front air-spring strut'
 Workshop Manual '401719 Removing and installing lower trailing arm'
 Workshop Manual '875019 Removing and installing condenser'
 Workshop Manual '519219 Removing and installing front underbody cover'
 Workshop Manual '50561903 Removing and installing front wheel housing liner (front section)'
 Workshop Manual '505619 Removing and installing front wheel housing liner'
 Workshop Manual '440519 Removing and installing wheel'
 Workshop Manual '449503 Performing front and rear suspension alignment'
 Workshop Manual '4495TW Adjustment values for suspension alignment'

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 Workshop Manual '456005 Initialising and calibrating steering-angle sensor'
 Workshop Manual '489025 Teaching power-steering gear'
 Workshop Manual '278515 Adjusting control unit for distance measuring sensor'
 Workshop Manual '963855 Replacing front camera'
 Workshop Manual '908055 Replacing camera for night vision system'

Warranty processing
Information:
Information
The working times specified below were determined specifically for carrying out this campaign and may
differ from the working times published in the Labor Operation List in PIWIS.
Scopes 1 - 3:

Valid for Panamera (971). See relevant Technical Information for these vehicle types.

Scope 4:

Replacing trailing arm on front axle, lower right
This scope must be invoiced if adjustment of the axle geometry was not required during suspension
alignment and consequently the front camera and further driver assistance systems did not have to be
calibrated.
Working time:
Replacing trailing arm on front axle, lower right
Includes:
Raising and lowering the vehicle
Removing and installing front right wheel
Removing and installing front underbody cover
Removing and installing front section of front wheel housing
liner on the right
Removing and installing front right wheel housing liner
Loosening and securing condenser
Performing suspension alignment
Calibrating steering-angle sensor
Teaching power-steering gear
Without:
Calibrating control unit for distance measuring sensor
Calibrating front camera
Calibrating night vision system

Labor time: 259 TU

Parts required:
V04015006N

Front axle trailing arm, lower right

1 ea.

PAF108544

Oval-head screw, M12 x 1.5 x 90

1 ea.

PAF909664

Hexagon collar nut, M12 x 1.5

1 ea.

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Materials required:
00004330508

Mounting paste

0.02 ea.

 Damage Code AMB2 099 000 2
Scope 5:

Replacing trailing arm on front axle, lower right
– also calibrating front camera without further driver assistance systems
•
•

without adaptive cruise control (ACC) (M-no. 3V2 or 3V9 or 8T8)
without Night View Assist (M-no. 9R1)
Working time:
Replacing trailing arm on front axle, lower right
Includes:
Raising and lowering the vehicle
Removing and installing front right wheel
Removing and installing front underbody cover
Removing and installing front section of front wheel housing
liner on the right
Removing and installing front right wheel housing liner
Loosening and securing condenser
Performing suspension alignment and adjusting the vehicle
Calibrating steering-angle sensor
Teaching power-steering gear
Calibrating front camera
Without:
Calibrating control unit for distance measuring sensor
Calibrating night vision system

Labor time: 622 TU

Parts required:
V04015006N

Front axle trailing arm, lower right

1 ea.

PAF108544

Oval-head screw, M12 x 1.5 x 90

1 ea.

PAF909664

Hexagon collar nut, M12 x 1.5

1 ea.

Additional parts required if the camber on the front axle was corrected:
N 91244301

Hexagon flange bolt, M12 x 1.5 x 90

6 ea.

Mounting paste

0.02 ea.

Materials required:
00004330508

 Damage Code AMB2 099 000 2

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Technical Information
Scope 6:

84/21

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4

Replacing trailing arm on front axle, lower right
– also calibrating front camera and driver assistance systems
•

with adaptive cruise control (ACC) (M-no. 3V2 or 3V9 or 8T8)

and/or
•

with Night View Assist (M-no. 9R1)
Working time:
Replacing trailing arm on front axle, lower right
Includes:
Raising and lowering the vehicle
Removing and installing front right wheel
Removing and installing front underbody cover
Removing and installing front section of front wheel housing
liner on the right
Removing and installing front right wheel housing liner
Loosening and securing condenser
Performing suspension alignment and adjusting the vehicle
Calibrating steering-angle sensor
Teaching power-steering gear
Calibrating front camera
Calibrating control unit for distance measuring sensor
Calibrating night vision system

Labor time: 650 TU

Parts required:
V04015006N

Front axle trailing arm, lower right

1 ea.

PAF108544

Oval-head screw, M12 x 1.5 x 90

1 ea.

PAF909664

Hexagon collar nut, M12 x 1.5

1 ea.

Additional parts required if the camber on the front axle was corrected:
N 91244301

Hexagon flange bolt, M12 x 1.5 x 90

8 ea.

Mounting paste

0.02 ea.

Materials required:
00004330508

 Damage Code AMB2 099 000 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.

© 2021 Porsche Cars North America, Inc.

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