3.4.4

Figure 20

Connect plug connection for trailer
Þ Figure 21 -1-).
hitch preparation (⇒
1
2

– Connection to towbar
system preparation
– Towbar system control unit
connection

Connect plug connection to the
Þ Figure
trailer hitch control unit (⇒
21 -2-)
4

Concluding work
4.1

Figure 21

Convert rear panel
4.1.1

Remove rear panel. ⇒ Workshop Manual '635619 Removing and installing rear panel'

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4.1.2

Mark the cut-out for the trailer hitch
Þ Figure 22
along the impression (⇒
-1-) on the inside of the rear panel so
that it is clearly visible using a pen.
1
2

– Marking
– Cut-out

Information
Mask the sawing area to prevent
damage.
4.1.3

Carefully make the cut-out using
a drill and saw along the marking
(⇒ Figure 22).

4.1.4

Þ Figure 22 -2-)
De-burr cut edges (⇒
with a knife or file.

4.1.5

Clean the inside of the rear panel to
remove any dust and grease (isopropanol cleaner).

4.1.6

Þ Figure 23 -1-)
Pull protective film (⇒
Þ Figure 23
off the reinforcement (⇒
-2-).

Figure 22

Figure 23

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4.1.7

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6

Insert reinforcement perfectly into
the rear panel. Fastening bores
Þ Figure 24 -1-) and bores for
(⇒
Þ Figure 24 -2-)
expansion rivets (⇒
must be covered exactly.
1
2
a

4.1.8

Macan (95B)

– Fastening bore
– Expansion rivet bore
– Bonding area

Press reinforcement firmly onto the
Þ Figure 24 -a-).
rear panel (⇒
Figure 24

Coding:

5

4.1.9

Secure the reinforcement with
Þ Figure 25
expansion rivets (2 ea.) (⇒
-1, 2-).

4.1.10

Install rear panel. ⇒ Workshop
Manual '635619 Removing and
installing rear panel'

4.2

Install side trim panel for right luggage
compartment. ⇒ Workshop Manual '700319
Removing and installing side trim panel for rear
luggage compartment'

4.3

Install cover for rear lock support. ⇒ Workshop
Manual '703919 Removing and installing cover
for rear lock carrier'

4.4

Install (side) luggage compartment trim panel (luggage compartment cover). ⇒ Workshop
Manual '700619 Removing and installing side luggage compartment trim (luggage
compartment cover)'

4.5

Install (center) luggage compartment trim panel (luggage compartment cover). ⇒ Workshop
Manual '700619 Removing and installing centre luggage compartment trim (luggage
compartment cover)'

4.6

Install rear apron. ⇒ Workshop Manual '635519 Removing and installing rear apron'

4.7

Connect the battery. ⇒ Workshop Manual '2X00IN Work instructions after disconnecting the
battery'

Figure 25

Enter trailer hitch (1D6) in the vehicle data
5.1

Preparatory work – Coding
5.1.1

Connecting a battery charger. ⇒ Workshop Manual '270689 Charging vehicle electrical system battery'

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Installation and Conversion Instructions

NOTICE
Voltage drop
•

Risk of irreparable damage to control unit

•

Risk of damage to control unit

•

Fault entries in the control unit

•

Coding in the control unit is aborted

•

Malfunctions in control unit, even during programming

Þ
⇒

Prior to disconnecting the control unit, switch off ignition and remove ignition key.

Þ
⇒

Ensure that the power supply is not interrupted during programming.

Þ
⇒

Connect a battery charger with a current rating of at least 90 A to the vehicle battery.
NOTICE

Control unit programming will be aborted if the WLAN connection is unstable.
•

An unstable WiFi connection can interrupt communication between the PIWIS Tester and the
vehicle communication module (VCI). As a result, control unit programming may be aborted.

Þ
⇒

During control unit programming, always connect the PIWIS Tester to the vehicle communication
module (VCI) via the USB cable.
5.1.2

P90999 - PIWIS Tester 4 must be connected to the vehicle and switched on.

5.1.3

Switch on ignition AND hazard warning lights on the vehicle.
Information
The PIWIS Tester instructions take precedence since the description may be different
with later Tester releases.
The procedure described here has been structured in general terms. Different text or
additional information may appear on the PIWIS Tester.

5.1.4

Select the “Diagnostics” PIWIS Tester menu item.

5.1.5

If P90999 - PIWIS Tester 4 is connected correctly, a connection to the vehicle will be
established: The model line is detected: "Macan" model line is detected.

5.1.6

Create a vehicle analysis log (VAL) in the "Overview" menu item.

Information
The function is ONLY available when the Tester is online!

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Installation and Conversion Instructions
5.2

Macan (95B)
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6

Enter the new vehicle equipment in the vehicle data using “PIWIS Online”
5.2.1

Select the function "Maintenance of vehicle data with PIWIS ONLINE" in the "Model
line-specific tests and campaigns" menu item.
A message appears informing you that the “Actual” (vehicle) data and “Required”
(PIWIS Online) data will be compared.
Press •F12“ to continue.

5.2.2

Confirm the message “The vehicle data was compared with PIWIS Online. Significant
differences were found” with •F12“.

5.2.3

Look for the option "TRAILER HITCH" in the "Family" column.
Select the value "1D6 - TRAILER HITCH WITHOUT BALL JOINT (USA)" in the
drop-down menu. Press •F12“ to continue

5.2.4

A table containing the coding value and the columns “new value” and “old value” is
displayed in the overview. Press •F8“ to continue.

5.2.5

Data is then written/stored. The following messages appear one after the other:
•
•
•
•

5.2.6
5.3

Transferring vehicle data to PIWIS Online.
Writing and transferring vehicle data to the vehicle.
Vehicle order was written successfully.
A check was performed in order to check whether control units have to be coded
as a result of the changes that were made.

Press •F10“ to open the log. Check that the selected vehicle equipment has been
entered and close the log.

Code/program the new vehicle equipment(s)
5.3.1

Confirm the table containing a list of control units that must be coded/programmed
by pressing •F12“.

5.3.2

Individual data records will be loaded, depending on the number of control units to be
coded/programmed.
Wait until messages “Creating backup documentation. Please wait...” and “Coding
was completed successfully”. Press •F12“ to continue.
Repeat the process for other control units if necessary.

5.3.3

Wait for the “Adaptation of the control units is complete.” message and check the
coding status of the control units in the table displayed.
Continue by pressing •F12“ to return to the control unit overview.

5.4

Read out the fault memory of all systems, work through any existing faults, and erase the fault
memory ( ⇒ Workshop Manual '0335IN Maintenance diagnosis: Diagnostic system and maintenance inter...').

5.5

Create a vehicle analysis log (VAL) in the "Overview" menu item.

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Installation and Conversion Instructions

5.6

Switch off ignition and disconnect P90999 - PIWIS Tester 4.

5.7

Disconnect the battery charger. ⇒ Workshop Manual '270689 Charging vehicle electrical
system battery'

–Retrofitted (mechanical) trailer hitch–
Includes:
Removing and installing rear apron, real panel working out
cut-out in rear panel, installing rear panel reinforcement,
installing and coding trailer hitch.

Labor time: 235 TU

ONLY for vehicles with Lane Change Assist/Lane Keep Assist (6I1/6I3/7Y1):
91 70 25 53: Program Lane Change Assist control unit;
Includes:
Measure calibration plate on the vehicle.

Labor time: 47 TU

ONLY vehicles with reversing camera (KA2) and reversing camera including Surround View (KA6):
91 72 25 50: Program Surround View camera control unit

Labor time: 62 TU

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.

© 2026 Porsche Cars North America, Inc.

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