No. 205-20 Service Bulletin/Repair Instructions

Symptom-based workshop manual
Service

205/20 ENU
3735
3
Transmission Symptom - Oil Leaks on Automatic Transmission: Observe Specified

Procedure (SY 205/20)

Model Line:
Cayenne (9YA/9YB)
Model Year:
As of 2018
Concerns:
Automatic transmission
Symptom:
Oil leaks are found on the vehicle in the area of the automatic transmission. The location and cause of the

problem cannot always be clearly determined.
Background:
We have discovered that the location and cause could not always be clearly determined in the dealer

organization when attempting to resolve the complaint “Oil leak”. As a result, some of the repair

measures that were carried out were not always effective.

An oil-contaminated oil pan, for example, may also be caused by oil migrating from the threaded

connection on the oil line.

Information

Oil leaks on the transfer box are described in the document  Technical Information 'Transmission

symptom - Oil leaks on transfer box: Observe specified procedure (SY 206/20)'.
Remedial

Action:
Find oil leaks and carry out the relevant repair measure.
Preparatory work

Work

Procedure:
Information

•
Oil leaks must be clearly identifiable and reproducible.
•
Engine oil and coolant must have reached operating temperature during a test drive.
1
Document the original complaint condition with meaningful photos.
2
Attach documentation to PQIS line.
3
Clean automatic transmission and transfer box thoroughly.
AfterSales
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Service

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Symptom-based workshop manual
205/20
Information

If the oil leak has spread so that the oil pan is also

contaminated  Oil migration, proceed as follows in

the event of a complaint:

• Check that the screws on the ATF pan are

accessible and are seated correctly with the

specified tightening torque and secure properly if

necessary.

• Clean the area of the ATF pan extremely thoroughly

as oil penetration of the ATF pan seal can result in

incorrect interpretation.

4
Spray large areas of the automatic transmission and

transfer box with SpotCheck around the suspected

leakage points.
5
Perform a test drive.
6
Locate the oil leak:

•

•

•
Oil migration
The oil leak is located on the transfer box, continue with  Technical Information 'Transmission

symptom - Oil leaks on transfer box: Observe specified procedure (SY 206/20)'

The oil leak is located on the automatic transmission, continue with  Technical Information 'Oil

leaks on automatic transmission'.

The oil leak cannot be clearly identified, continue with  Technical Information 'Oil leaks on

automatic transmission'.
7
Produce photo documentation of the leakage point located using SpotCheck.
8
Attach documentation to PQIS line.
Oil leaks on automatic transmission

Information

Traces of oil on the ATF pan can occur as a result of oil migration.

Only in rare cases is the ATF pan seal defective.

1
Check for oil leaks on the underside of the ATF pan  Crack in ATF pan.

If a crack is discovered, replace the ATF pan, see  Technical Information 'Replacing ATF pan'.
Mar 1, 2021

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AfterSales
Symptom-based workshop manual
Service

205/20 ENU
3735
3
Crack in ATF pan

Information

An oil-contaminated oil pan may also be caused by oil migrating from the threaded connection on the oil

line.

2
Check for oil leaks on the flange of the ATF cooling line  Flange leaking or  Transmission housing

porous.

2.1
In the case of oil leaks on the flange, replace both sealing rings, see  Technical Information

'Replacing sealing ring on ATF cooling line'.
2.2
In the case of oil leaks between the flanges (transmission housing porous), replace the

automatic transmission, see  Technical Information 'Replacing automatic transmission'
Flange leaking
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Symptom-based workshop manual
Transmission housing porous

3
Check for oil leaks on the ATF cooling lines  Friction welded joint for ATF cooling line faulty or

 Friction welded joint for ATF cooling line PHEV faulty.

In the case of oil leaks on the friction welded joint (production fault), replace the relevant ATF cooling

line, see  Technical Information 'Replacing ATF cooling line'.
Friction welded joint for ATF

cooling line faulty
Mar 1, 2021

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AfterSales
Symptom-based workshop manual
Service

205/20 ENU
3735
3
Friction welded joint for ATF cooling

line PHEV faulty

4
Check for oil leaks around the protective tube for drive shaft  Drive-shaft sealing ring damaged

(front protective tube) and  Drive-shaft sealing ring damaged (rear protective tube).

In the case of damage, replace both drive-shaft sealing rings, see  Technical Information

'Replacing drive shaft sealing ring' .
Drive-shaft sealing ring damaged

(front protective tube)
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205/20
Symptom-based workshop manual
Drive-shaft sealing ring damaged

(rear protective tube)

5
Check for oil leaks around the output shaft to the transfer box  Oil migration and  Oil leak on

output-shaft sealing ring.

5.1
In the case of damage, replace the output shaft sealing ring, see  Technical Information

'Replacing output shaft sealing ring'.
5.2
In the case of damage, replace the transfer-gear sealing ring, see  Technical Information

'Transmission symptom - Oil leaks on transfer box: Observe specified procedure (SY

206/20)'
Oil migration
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Symptom-based workshop manual
Service

205/20 ENU
3735
3
Oil leak on output-shaft sealing ring
Replacing sealing ring on ATF cooling line

Work Procedure: 1
2

Parts Info:
Replace sealing ring on ATF cooling line at the flange, see  Workshop Manual '386219 Removing

and installing ATF cooling line'.

Check and top up ATF, see  Workshop Manual '370235 Checking and topping up ATF'.
Parts required:

Part No.
Designation

– Location
Qty.
N 90666003
 O-ring

– ATF cooling line
2 ea.
PAF82595100
 Screw

– Center underbody cover
2 ea.
PAB39800803
 Cover

– ATF pan
1 ea.
or

PAB398008B
 Cover (transmission number A2901, A3001,

A4002, A20P1, A30P1)

– ATF pan
1 ea.
PAF00072900
 Hexagon socket head bolt

– Front underbody cover
3 ea.
PAB32154900
 Screw plug

– Checking and topping up ATF
1 ea.
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3735
Materials:
ENU
Required materials (usually already available at the Porsche dealer):

Part No.
Designation

– Use

 Transmission oil (gearwheel set)

– Checking and topping up ATF
0004321054
1) approx.
Invoicing:
Symptom-based workshop manual
205/20
Qty.

20 liter/ 5.28 gal

container 1)
0.1 liter/ 3.38 fl oz required per vehicle.
For documentation and warranty invoicing, enter the labor operations, PQIS coding and relevant part

numbers specified below in the warranty claim:
APOS
Labor operation
I No.
37350100
Checking automatic transmission
38621900

37023555
Checking and topping up ATF

PQIS coding:
Location (FES5)
38620
ATF cooling line
Damage type (SA4)
5043
Oil leak
References:
 Workshop Manual '386219 Removing and installing line for ATF cooling'

 Workshop Manual '370235 Checking and topping up ATF'

 Technical Information '370235 Transmission symptom - Oil leaks on transfer box: Observe specified

procedure (SY 206/20)'
Replacing ATF cooling line

Work Procedure: 1
2

Parts Info:
Mar 1, 2021

Page 8 of 23
Replace ATF cooling line, see  Workshop Manual '386219 Removing and installing ATF cooling

line'.

Check and top up ATF, see  Workshop Manual '370235 Checking and topping up ATF'.
Parts required:

Part No.
Designation

– Location
Qty.
PAF82595100
 Screw

– Center underbody cover
2 ea.
PAB39800803
 Cover

– ATF pan
1 ea.
AfterSales
Symptom-based workshop manual
Service

205/20 ENU
3735
3
or

PAB398008B
 Cover (transmission number A2901, A3001,

A4002, A20P1, A30P1)

– ATF pan
1 ea.
PAF00072900
 Hexagon socket head bolt

– Front underbody cover
3 ea.
PAB32154900
 Screw plug

– Checking and topping up ATF
1 ea.
Additional parts required (V6 mono and biturbo without PHEV):

Part No.
Designation

– Location
Qty.
PAB31781800
 Oil supply line

– ATF cooling
1 ea.
or

PAB31781700
 Oil return line

– ATF cooling
1 ea.
Additional parts required (V6 monoturbo PHEV):

Part No.
Designation

– Location
Qty.
PAB317801A
 Oil pressure line

– ATF cooling
1 ea.
Additional parts required (V8 biturbo without PHEV):

Part No.
Designation

– Location
Qty.
PAB31781810
 Oil supply line

– ATF cooling
1 ea.
or

PAB31781710
 Oil return line

– ATF cooling
AfterSales
1 ea.
Mar 1 2021

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Additional parts required (V8 biturbo PHEV):

Part No.
Designation

12 3 4

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