No. 158-20

Service Bulletin Details

Public Details for: No. 158-20

Instructions for dealers to check the component pairing on the wheel carrier/transverse control arm pairing.


- 2020 -

Models from 2020
2020 PORSCHE 911 
Service
Technical Information
158/20 ENU
4050
4
Spare Parts Requirements for Wheel Carrier/Transverse Control Arm on Front Axle - Check
Component Pairing, a Mixed Installation is Not Permitted (158/20)
Vehicle Type:
911 Turbo S (992) / 911 Turbo S Cabriolet (992)
Model Year:
As of 2020 up to 2021
Subject:
Spare parts requirements for wheel carrier or transverse control arm
Information:
If the wheel carrier or transverse control arm needs replacing, the parts installed in the vehicle
must be checked beforehand due to a change to the wheel carrier design during production.
Parts can be replaced individually or may all have to be replaced on each axle, depending on
whether a new wheel carrier or a new transverse control arm is required.
Remedial
Action:
Check the transverse control arm connection on the wheel carrier. Depending of the result of the check,
carry out the following repair measure as described in the section  Technical Information 'Checking the
transverse control arm on the wheel carrier threaded joint'.
Affected part numbers
Parts Info:
Part number (old)
Part number (new)
Designation
992407245BY
992407245CY
Left pivot bearing (wheel carrier)
992407246BY
992407246CY
Right pivot bearing (wheel
carrier)
992407151E
992407151F
Wishbone
PAF908088 (M12)
WHT006151 (M14)
Hexagon collar nut, self-locking
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Nov 25, 2020
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ENU
Technical Information
158/20
Checking the transverse control arm connection on the wheel carrier
Work
Procedure:
Existing vehicles have an M12 threaded joint that
connects the transverse control arm to the wheel carrier
 Threaded joint between transverse control arm and
wheel carrier on existing vehicles.
Threaded joint between transverse control
arm and wheel carrier on existing vehicles
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Service
Technical Information
158/20 ENU
4050
4
New vehicles have an M14 threaded joint that connects
the transverse control arm to the wheel carrier as well
as a pressed bush  Threaded joint between transverse
control arm and wheel carrier on new vehicles.
Information
Due to the nature of the assembly, a mixed installation of
the old transverse control arm and a new wheel carrier is
not permitted. Due to its design, the M12 threaded joint
does not have the required contact surface on the new
wheel carrier. If a mixture of old and new components are
installed, there is no guarantee that the forces occurring
will not damage the wheel carrier.
1
Raise the vehicle, see  Workshop Manual '4X00IN
Lifting the vehicle'.
2
Check the transverse control arm connection on the
wheel carrier.
Threaded joint between transverse control
arm and wheel carrier on new vehicles
•
If it has an M12 threaded joint and only a
transverse control arm is required, this can be ordered and replaced in the normal way. Order
the old transverse control arm and then replace the existing control arm, see  Technical
Information '4X00IN Replacing the transverse control arm only (M12 threaded joint)'.
•
If it has an M12 threaded joint and a new wheel carrier is required, new wheel carriers with new
transverse control arms must be installed to the front axle. Order new wheel carriers with new
transverse control arms and replace the existing wheel carriers, see  Technical Information
'4X00IN Replacing wheel carriers and transverse control arms (complete front axle)'.
•
If it has an M14 threaded joint, the wheel carriers and transverse control arms can be replaced
individually. Order the required parts and replace the faulty component, see  Technical Information '4X00IN Replacing wheel carriers or transverse control arms (M14 threaded joint)'.
Replacing the transverse control arm only (M12 threaded joint)
Parts Info:
Parts required
Part No.
Designation
– Use
Qty.
992407151E
 Transverse control arm
– Front axle
1 ea.
PAF908088
 Hexagon collar nut, self-locking
– Front axle
1 ea.
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Technical Information
158/20
9A700837900
 Tie-wrap
– Front axle
2 ea.
9A700820900
 Hexagon-head bolt
– Transverse control arm
1 ea.
PAF909664
 Hexagon collar nut, self-locking
– Transverse control arm
1 ea.
Work Procedure: 1
2
Replace the transverse control arm, see  Workshop Manual '401719 Removing and installing
lower trailing arm'.
Perform suspension alignment and make adjustments, see  Workshop Manual '449503
Performing suspension alignment at front and rear'.
Replacing wheel carriers and transverse control arms (complete front axle)
Parts Info:
Parts required
Part No.
Designation
– Use
Qty.
992407245CY
 Left pivot bearing (wheel carrier)
– Front axle
1 ea.
992407246CY
 Right pivot bearing (wheel carrier)
– Front axle
1 ea.
992407151F
 Transverse control arm
– Front axle
2 ea.
Additional parts required
WHT006151
 Hexagon collar nut, self-locking
– Transverse control arm
2 ea.
9A700820900
 Hexagon-head bolt
– Transverse control arm
2 ea.
PAF909664
 Hexagon collar nut, self-locking
– Transverse control arm
– Connecting link for anti-roll bar
– Spring strut to wheel carrier
6 ea.
9A700758500
 Cheese head bolt M12x1.5x85
– Brake calliper
4 ea.
9A700837900
 Tie-wrap
– Longitudinal arm
4 ea.
PAF008742
 Hexagon-head bolt
– Spring strut to wheel carrier
2 ea.
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Service
Technical Information
158/20 ENU
4050
WHT007021
 Hexagon nut, self-locking with washer
– Drive shaft
2 ea.
PAF908088
 Hexagon collar nut, self-locking
– Tie rod
2 ea.
PAF100829
 Hexagon-head bolt (combination)
– Cover plate
6 ea.
9P1407621
 Angular-contact ball bearing
– Wheel carrier
4
Only for vehicles with PDCC
PAF008758
 Hexagon flange bolt
– PDCC damper adapter
Work Procedure: 1
4 ea.
Replace the lower trailing arm, see  Workshop Manual '401719 Removing and installing lower
trailing arm'.
2
Replace the wheel carrier, see  Workshop Manual '405019 Removing and installing wheel bearing
housing' and  Workshop Manual '405755 Replacing front wheel bearing'.
3
Perform suspension alignment and make adjustments, see  Workshop Manual '449503
Performing suspension alignment at front and rear'.
Replacing wheel carriers or transverse control arms (M14 threaded joint)
Parts Info:
Part numbers for wheel carriers or transverse control arms with M14 threaded joint
Part No.
Designation
– Use
Qty.
992407245CY
 Left pivot bearing (wheel carrier)
– Front axle
1 ea.
992407246CY
 Right pivot bearing (wheel carrier)
– Front axle
1 ea.
992407151F
 Transverse control arm
– Front axle
1 ea.
Work Procedure: 1
Replace the transverse control arm, see  Workshop Manual '401719 Removing and installing
lower trailing arm'.
or
1
Replace the wheel carrier, see  Workshop Manual '405019 Removing and installing wheel bearing
housing' and  Workshop Manual '405755 Replacing front wheel bearing'.
2
Perform suspension alignment and make adjustments, see  Workshop Manual '449503
Performing suspension alignment at front and rear'.
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Technical Information
158/20
Invoicing
Invoicing:
For documentation and warranty invoicing, enter the labor operations specified below in the warranty
claim, PQIS coding and part numbers, depending on the relevant repair:
APOS
Labour operation
I No.
44051911
Removing and installing wheel
44051912
Removing and installing wheel
44052011
Removing and installing 2 wheels
40171951
Removing and installing lower trailing arm
40171952
Removing and installing lower trailing arm
40172050
Removing and installing 2 lower trailing arms
40501955
Removing and installing wheel bearing housing
40501956
Removing and installing wheel bearing housing
40575555
Replacing front wheel bearing
40575556
Replacing front wheel bearing
40575655
Replacing 2 front wheel bearings
44950300
Performing front/rear suspension alignment
44951550
Adjusting vehicle at front/rear
PQIS coding:
Location (FES5)
40500
Wheel bearing housing
Damage type (SA4)
9735
Repair in accordance with PAG instructions
Parts:
Conversion of front axle to M14 threaded joint.
Part No.
Designation
– Use
Qty.
992407245CY
Left pivot bearing (wheel carrier)
– Front axle
1 ea.
992407246CY
Right pivot bearing (wheel carrier)
– Front axle
1 ea.
992407151F
Transverse control arm
– Front axle
2 ea.
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AfterSales
Service
Technical Information
158/20 ENU
4050
4
Additional parts required
WHT006151
Hexagon collar nut, self-locking
– Transverse control arm
2 ea.
9A700820900
Hexagon-head bolt
– Transverse control arm
2 ea.
PAF909664
Hexagon collar nut, self-locking
– Transverse control arm
– Connecting link for anti-roll bar
– Spring strut to wheel carrier
6 ea.
9A700758500
Cheese head bolt M12x1.5x85
– Brake calliper
4 ea.
9A700837900
Tie-wrap
– Longitudinal arm
4 ea.
PAF008742
Hexagon-head bolt
– Spring strut to wheel carrier
2 ea.
WHT007021
Hexagon nut, self-locking with washer
– Drive shaft
2 ea.
PAF908088
Hexagon collar nut, self-locking
– Tie rod
2 ea.
PAF100829
Hexagon-head bolt (combination)
– Cover plate
6 ea.
9P1407621
Angular-contact ball bearing
– Wheel carrier
Only for vehicles with PDCC
PAF008758
Hexagon flange bolt
– PDCC damper adapter
4 ea.
Only for transverse control arms with M12 threaded joint on the vehicle.
Part No.
Designation
– Use
Qty.
992407151E
Transverse control arm
– Front axle
1 ea.
PAF908088
Hexagon collar nut, self-locking
– Front axle
1 ea.
9A700837900
Tie-wrap
– Front axle
2 ea.
AfterSales
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References:
ENU
Technical Information
158/20
 Workshop Manual '4X00IN Lifting the vehicle '
 Workshop Manual '401719 Removing and reinstalling lower trailing arm'
 Workshop Manual '405019 Removing and installing wheel bearing housing'
 Workshop Manual '405755 Replacing front wheel bearing'
 Workshop Manual '449503 Performing front and rear suspension alignment'
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.
© 2020 Porsche Cars North America, Inc.
Nov 25, 2020
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