No. 55-21

Service Bulletin Details

Public Details for: No. 55-21

Instructions for removing and installing the drive belt on 8 cylinder gas engines since 2017.


- 2020 - 2019 - 2018 - 2017 -

Models from 2020
2020 PORSCHE CAYENNE TURBO
2020 PORSCHE CAYENNE TURBO COUPE
2020 PORSCHE CAYENNE TURBO S HYB COUPE
Models from 2019
2019 PORSCHE CAYENNE TURBO
Models from 2018
2018 PORSCHE PANAMERA TURBO
2018 PORSCHE PANAMERA TURBO EXECUTIVE
2018 PORSCHE PANAMERA TURBO S E-HYBRID
2018 PORSCHE PANAMERA TURBO S HYBRID
2018 PORSCHE PANAMERA TURBO S HYBRID E
2018 PORSCHE PANAMERA TURBO S HYBRID S
2018 PORSCHE PANAMERA TURBO SPORT TURI
Models from 2017
2017 PORSCHE PANAMERA TURBO
2017 PORSCHE PANAMERA TURBO EXECUTIVE 
Service
Technical Information
55/21
ENU
1378
1
Removing and Installing Drive Belt: Observe Specified Procedure (55/21)
Vehicle Type:
Panamera Turbo (971)/Panamera Turbo S E-Hybrid (971)/Panamera GTS (971)
Cayenne Turbo (9YA/9YB)/Cayenne Turbo S E-Hybrid (9YA/9YB)/Cayenne GTS (9YA/9YB)
Model Year:
As of 2017
Equipment:
8-cylinder gasoline engines
Concerns:
Belt tensioner
Information:
Internal tests have shown that the dust boot on the belt tensioner can be damaged by relieving
the tension on the belt tensioner too much (fully) when removing or installing the drive belt.
For this reason, when removing and installing the drive belt, make sure that you only relieve the tension on
the belt tensioner as much as required to allow you to remove and install the drive belt. There is no need
to relieve the tension on the belt tensioner fully for removing and installing the drive belt.
See also the relevant Workshop Manual  Workshop Manual '137819 Removing and installing drive belt
(V8 biturbo)' to avoid damaging the belt tensioner.
AfterSales
Apr 7, 2021
Page 1 of 2
1
Service
1378
ENU
Technical Information
55/21
Belt tensioner
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.
Apr 7, 2021
Page 2 of 2
AfterSales

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