No. 4-23

Service
Technical Information
4/23
ENU
WPA1
4
WPA1 – Reworking Brake Line Threading (Workshop Campaign)
Model Line:
911 (992)
718 Boxster (982)
718 Cayman (982)
Model Year:
As of 2022
Concerns:
Brake line screw connection between brake calliper and brake hose
Cause:
On the affected vehicles, the brake line screw connection on the front and rear axles may not
have been fully tightened to the prescribed final tightening torque.
In this case, leakage in the brake system over the service life cannot be ruled out. The vehicles showed
no leakage during factory testing. The brake system remains fully functional and the legally required
minimum deceleration is maintained even in the event of a failure.
Action:
Tighten the brake line screw connections on the front and rear axle to the specified final tightening torque.
Information
The brake lines only have to be replaced in 1% of cases.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
Required parts and materials
Parts Info:
Information
The required parts and materials are only required for replacing the brake lines and are listed in the
individual campaign scopes (Scope 3 to Scope 11).  Technical Information 'Warranty processing'
Required tools
Tool:
•
•
Torque spanner, 6 – 50 Nm (4.5 – 37 ftlb.), e.g. VAG 1331A torque spanner, 6-50 Nm (4.5-37
ftlb.)
Torque spanner, 150 – 800 Nm (111 – 592 ftlb.), e.g. VAG 1601 torque spanner, 150 - 800 Nm
(111 - 592 ftlb.)
Additional required tool for vehicles with central wheel bolts (I-no. 1PJ):
•
•
9796 - Socket spanner for central wheel bolt
9794 - Assembly aid for central wheel bolt
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Mar 17, 2023
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Technical Information
4/23
Additional required tool for replacing the brake lines:
Suitable brake fluid bleeding equipment, e.g. VAS 5234 - brake filling and bleeding equipment
•
Checking brake line screw connections
Work Procedure: 1
Move the vehicle onto a lifting platform and raise it.  Workshop Manual '4X00IN01 Raising the
vehicle'.
2
Remove wheels.
 Workshop Manual '440519 Removing and installing wheel'.
 Workshop Manual '440519 Remove and install wheel with central bolt'.
3
Check brake line screw connectios  Brake line
screw connection -1- and  Brake line screw
connection -3- on the front and rear axles for loss of
brake fluid (drop formation).
Brake line screw connection
Assessment
Action
No drop formation or leakage visible.
Continue with  Technical Information '440519
Reworking brake line screw connection'.
[Scope 1 or Scope 2]
Drop formation/leakage visible.
Continue with  Technical Information '440519
Replacing brake lines'.
[Scope 3 to Scope 11]
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Service
Technical Information
4/23
ENU
WPA1
4
Reworking brake line threading
Work Procedure: 1
Tighten screw connections of the brake line  Brake
line screw connection -1- and  Brake line screw
connection -3- on the front and rear left and right
axles with Tightening torque 13 Nm (9.6 ftlb.).
2
Install wheels.
 Workshop Manual '440519 Removing and
installing wheel'.
 Workshop Manual '440519 Remove and install
wheel with central bolt'.
3
Lower the vehicle and remove it from the lifting
platform.
4
Enter the campaign in the Warranty and Maintenance booklet.
5
Continue with  Technical Information '440519 Warranty processing'.
[Scope 1 or Scope 2]
Brake line screw connection
Replacing brake lines
Information
•
There are two bleeder valves on the brake calliper. Brake fluid must be drained at both bleeder
valves in order to bleed the brakes.
•
Always bleed the outer bleeder valve first.
Work Procedure: 1
Photograph and upload the images to the PCSS procedure line with the respective caption, e.g.
brake_line_rear_left_VIN_image 1.
2
Unclip electric plug connection for the brake pad wear indicator at the brake line.
3
Replace the affected brake line between the brake calliper and front brake hose.
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Service
WPA1
ENU
Technical Information
4/23
3.1
Loosen and unscrew union nut on the 
Replacing brake line -1- brake line at the
brake calliper Replacing brake line -2-.
Collect escaping brake fluid in a suitable
container.
3.2
Loosen and unscrew union nut on the 
Replacing brake line -3- brake line at the
brake hose  Replacing brake line -4-.
Then remove the brake line and close off the
opening on the brake hose using a suitable
stopper.
3.3
3.4
Replacing brake line
Position new brake connecting line on the
brake calliper  Replacing brake line -2- and screw in the union nut  Replacing brake
line -1- with just a few turns initially.
 Replacing brake line -4- Insert brake line on the brake hose, align it without tension and
secure  Replacing brake line -3- it to the brake hose with  Replacing brake line -4- the
union nut.
Tightening torque 16 Nm (11.8 ftlb.)
3.5
Tighten union nut for the  Replacing brake line -1- brake connecting line on the brake
calliper  Replacing brake line -2-. Make sure not to twist the brake line while doing this.
Tightening torque 16 Nm (11.8 ftlb.)
4
Bleed the brake system at all four brake callipers.  Workshop Manual '470107 Bleed brake
system'.
5
Install wheels.
 Workshop Manual '440519 Removing and installing wheel'.
 Workshop Manual '440519 Remove and install wheel with central bolt'.
6
Lower the vehicle and remove it from the lifting platform.
7
Enter the campaign in the Warranty and Maintenance booklet.
8
Continue with  Technical Information '440519 Warranty processing'.
[Scope 3 to Scope 11]
Warranty processing
Information
The specified labor times were determined specifically for carrying out this campaign and include
all necessary preliminary and subsequent rework. The labor time may differ from the working times
published in the Labor Operation List in the PCSS.
Mar 17, 2023
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Service
Technical Information
Scope 1:
4/23
ENU
WPA1
4
Reworking brake line threading
•
For vehicles with standard wheel bolts (M-no. 1PA) or wheel bolts with anti-theft protection (M-no.
1PD)
Labor time:
Reworking brake line threading
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 85 TU
 Damage code WPA1 066 000 1
Scope 2:
Reworking brake line threading
•
For vehicles with central wheel bolts (M-no. 1PJ)
Labor time:
Reworking brake line threading
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 129 TU
 Damage code WPA1 066 000 1
Scope 3:
Replacing brake lines
Valid for 911 (992)
•
•
with standard wheel bolts (I-no. 1PA) or wheel bolts with anti-theft protection (I-no. 1PD)
with M-no. A8C, 1LS, 2EB
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 147 TU
Parts required:
992611771
 Front left brake line
1 pc.
992611772
 Front right brake line
1 pc.
992614771A
 Rear left brake line
1 pc.
992614772A
 Rear right brake line
1 pc.
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Service
WPA1
ENU
Technical Information
4/23
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 4:
Replacing brake lines
Valid for 911 (992)
•
•
with standard wheel bolts (I-no. 1PA) or wheel bolts with anti-theft protection (I-no. 1PD)
with M-no. A8F, 1LR, E0A, E7S, 2EB, 2ET
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 147 TU
Parts required:
992611771A
 Front left brake line
1 pc.
992611772A
 Front right brake line
1 pc.
992614771B
 Rear left brake line
1 pc.
992614772B
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 5:
Replacing brake lines
Valid for 911 (992)
•
•
Mar 17, 2023
Page 6 of 11
with central wheel bolt (M-no. 1PJ)
with M-no. A8C, A8F, 1LQ, 1LX, 2EC, 2EU
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Service
Technical Information
4/23
ENU
WPA1
4
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 187 TU
Parts required:
992611771B
 Front left brake line
1 pc.
992611772B
 Front right brake line
1 pc.
992614771D
 Rear left brake line
1 pc.
992614772D
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 6:
Replacing brake lines
Valid for 911 (992)
•
•
with central wheel bolt (M-no. 1PJ)
with M-no. A8F, 1LR, E0A, E7S, 2EB, 2ET
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 187 TU
Parts required:
992611771A
 Front left brake line
1 pc.
992611772A
 Front right brake line
1 pc.
992614771B
 Rear left brake line
1 pc.
992614772B
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
AfterSales
0.04 pc
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Service
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Technical Information
4/23
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 7:
Replacing brake lines
Valid for 911 (992)
•
•
with central wheel bolt (M-no. 1PJ)
with M-no. A8F, E0W, 1LR, 1LS, 2EB, 2ET
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 187 TU
Parts required:
992611771C
 Front left brake line
1 pc.
992611772C
 Front right brake line
1 pc.
992614771B
 Rear left brake line
1 pc.
992614772B
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 8:
Replacing brake lines
For 911 Turbo (992)
•
•
with central wheel bolt (M-no. 1PJ)
with M-no. A8C, A8F, 1LQ, 1LX, 2EB, 2ET
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Mar 17, 2023
Page 8 of 11
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Labor time: 187 TU
Service
Technical Information
4/23
ENU
WPA1
4
Parts required:
992611771B
 Front left brake line
1 pc.
992611772B
 Front right brake line
1 pc.
992614771E
 Rear left brake line
1 pc.
992614772E
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 9:
Replacing brake lines
For 911 Turbo (992)
•
•
with central wheel bolt (M-no. 1PJ)
with M-no. A8C, A8F, 1LQ, 1LX, 2EC, 2EU
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 187 TU
Parts required:
992611771B
 Front left brake line
1 pc.
992611772B
 Front right brake line
1 pc.
992614771
 Rear left brake line
1 pc.
992614772
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
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Service
WPA1
Scope 10:
ENU
Technical Information
4/23
Replacing brake lines
•
Valid for 911 GT3 (992)
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 190 TU
Parts required:
9GT611707C
 Front left brake line
1 pc.
9GT611708C
 Front right brake line
1 pc.
9GT611775
 Rear left brake line
1 pc.
9GT611776
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
 Mounting paste (100 gram/ 3.52 oz tube)
0.04 pc
00004321086
 Brake fluid (30-liter/ 7.9 gal container)
0.06 pc
 Damage Code WPA1 066 000 2
Scope 11:
Replacing brake lines
•
Valid for 718 Boxster (982) / Cayman (982)
Labor time:
Replacing brake lines
Includes:
Removing and installing wheels
Checking brake lines
Labor time: 147 TU
Parts required:
992611771
 Front left brake line
1 pc.
992611772
 Front right brake line
1 pc.
98135558102
 Rear left brake line
1 pc.
98135558202
 Rear right brake line
1 pc.
Required materials (usually already available at the Porsche dealer):
00004330508
Mar 17, 2023
Page 10 of 11
 Mounting paste (100 gram/ 3.52 oz tube)
AfterSales
0.04 pc
Service
Technical Information
00004321086
4/23
 Brake fluid (30-liter/ 7.9 gal container)
ENU
WPA1
4
0.06 pc
 Damage Code WPA1 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.
© 2023 Porsche Cars North America, Inc.
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