Service

Technical Information

135/18 ENU

WJ71

4

WJ71 - Replacing Fastening Screws on Rear Axle Struts (Workshop Campaign)

Model Line:

911 (991)

Model Year:

As of 2018 up to 2019

Subject:

Fastening screws on rear axle struts

Information:

Due to a manufacturing error, there is a possibility that the front screws for securing the rear
axle struts to the body do not meet the required specifications.
As a result, the front fastening screws can break over the service life of the vehicle.

Remedial
Action:

Replace front fastening screws on rear axle struts.

Affected
Vehicles:

Only the vehicles assigned to the campaign (see also PIWIS Vehicle information). This campaign affects 8
vehicles in North America.

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Sep 10, 2018
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4

Service
WJ71

ENU

Technical Information

135/18

Installation
position:

Installation position of rear axle struts

Parts required
Parts Info:

Please note: Parts can be ordered as normal. Parts for this campaign will NOT be automatically
allocated to your dealership.
Part No.

Designation

Qty.

99907344301

 Combination screw, M12 x 1.5 x 40

2 ea.

Required tools
Tools:

•
•

Torque screwdriver, 1.5 – 3 Nm (1 - 2 ftlb.), e.g. VAS 6494 - Torque screwdriver
Torque wrench, 20 – 100 Nm (15 – 74 ftlb.), e.g. VAS 5820 - Torque wrench, 20-100 Nm
(15-74 ftlb.) or locally available torque wrench from another vendor

Replace fastening screws on rear axle struts
Work Procedure: 1

Sep 10, 2018
Page 2 of 3

Raise the vehicle  Workshop Manual '4X00IN01 Lifting the vehicle'.

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Service

Technical Information

135/18 ENU

WJ71

4

2

Remove rear underbody cover  Workshop Manual '519419 Removing and installing cover for rear
underbody'.

3

Unscrew fastening screws  Fastening screws for
rear axle struts -1- on rear axle struts  Fastening
screws for rear axle struts -2-. Fit new fastening
screws and tighten using the two-step tightening
procedure.
•
•

4

5

Step 1 – Initial tightening: Tightening torque
90 Nm (67 ftlb.)
Step 2 – Final tightening: Torque angle 90°

Install rear underbody cover  Workshop Manual
'519419 Removing and installing cover for rear
underbody'.

Fastening screws for rear axle struts

Enter the campaign in the Warranty and Maintenance booklet.

Warranty processing
Information
The specified working time was determined specifically for carrying out this campaign and includes all
necessary preliminary and subsequent work. The working time may therefore differ from the working
time published in the Labour Operation List in PIWIS.

Scope:

Working time:
Labor time: 71 TU

Replacing fastening screws on rear axle struts
Includes:
Raising and lowering the vehicle
Removing and installing cover for rear underbody
Parts required:
99907344301

Combination screw, M12 x 1.5 x 40

2 ea.

 Damage Code WJ71 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.

© 2018 Porsche Cars North America, Inc.

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