No. 51-21

Service
Technical Information
51/21
ENU
WMC3
4
WMC3 - Replacing Hydraulic Unit (Workshop Campaign)
Model Line:
Macan (95B)
Model Year:
As of 2020 up to 2021
Concerns:
Hydraulic unit
Information:
Due to a temporary manufacturing problem, there is a possibility that the installed hydraulic
unit for the brake system was not manufactured according to specifications on the affected
vehicles.
If this is the case, this can result in noises from the hydraulic unit in the engine compartment area over the
service life of the vehicle.
Action required: Replace hydraulic unit.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
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Service
WMC3
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Technical Information
51/21
Installation
Position:
Installation position of hydraulic unit
Required parts and materials
Parts Info:
Part No.
Designation
– Use
Qty.
Vehicles with assigned campaign scope 1:
95B614511T
 Hydraulic unit
– Vehicles without ACC (I-no. 8T6)
1 ea.
or
Vehicles with assigned campaign scope 2:
95B614512T
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 Hydraulic unit
– Vehicles with ACC (I-no. 8T3)
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1 ea.
Service
Technical Information
Materials:
51/21
ENU
WMC3
4
Required materials (usually already available at the Porsche dealer or locally sourced):
Part No.
Designation
Qty.
00004321082
 Brake fluid, 1-liter/ 33.8 fl oz container
As much as
required
(approx. 2
liter/ 67.6 fl oz
required per
vehicle)
Required tools
Tools:
•
•
•
•
•
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 Battery charger,
90 A
9900 - PIWIS Tester 3
Torque wrench, 2 – 10 Nm (1.5 – 7.5 ftlb.), e.g. V.A.G 1783 - Torque wrench, 2-10 Nm (1.5-7.5
ftlb.)
Torque wrench, 6 – 50 Nm (4.5 – 37 ftlb.), e.g. Torque wrench, 6-50 Nm (4.5-37 ftlb.)
Suitable brake fluid bleeding device
Replacing hydraulic unit
Work Procedure: 1
2
Replace hydraulic unit with PSM control unit.  Workshop Manual '453055 Replacing hydraulic
unit/PSM control unit'
Enter the campaign in the Warranty and Maintenance booklet.
Warranty processing
Information
The working times specified were determined especially for the performance of this campaign and may
deviate from the working times published in the catalog of operations contained in PIWIS.
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Service
WMC3
Scope 1:
ENU
Technical Information
51/21
Only relevant for vehicles without ACC (I-no. 8T6)
Working Time:
Replacing hydraulic unit
Includes:
Lifting and lowering vehicle
Removing and installing front apron
Removing and installing cover for front lock carrier
Removing and installing PSM control unit
Removing and installing wheels
Ventilating brake system
Labor time: 164 TU
Parts required:
95B614511T
Hydraulic unit
1 ea.
00004321082
Brake fluid
2 pcs.
(for warranty
invoicing only)
 WMC3 066 000 2
Scope 2:
Only relevant for vehicles with ACC (I-no. 8T3)
Working Time:
Replacing hydraulic unit
Includes:
Lifting and lowering vehicle
Removing and installing front apron
Removing and installing cover for front lock carrier
Removing and installing PSM control unit
Removing and installing wheels
Ventilating brake system
Labor time: 164 TU
Parts required:
95B614512T
Hydraulic unit
1 ea.
00004321082
Brake fluid
2 pcs.
(for warranty
invoicing only)
 WMC3 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.
© 2021 Porsche Cars North America, Inc.
Jul 30, 2021
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