# Service bulletin 122\-H3T9C\-02

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10128653
- Published by NHTSA: 2018\-02\-12
- Manufacturer's number: 122\-H3T9C\-02
- Manufacturer's date: 2018\-01\-04
- NHTSA component: POWER TRAIN

## NHTSA's summary

Concern: Abrupt, ?Harsh? Gear Shift Changes, particularly in first and second gears Information: Rough gear changes with unmatched engine and transmission revs can be attributed to an unadapted PDK. Transmission performance issues characterized by unmatched, abrupt shifts, particularly in first and second gears may require a driving adaption. Prior to the adaption drive, update PDK Software using the latest PT3G Version and perform a calibration. Successful calibration of the PDK is a prerequisite for the adaption drive.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10128653-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10128653-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Vehicles listed

- 2017 to 2018 PORSCHE PANAMERA

## Other bulletins for the same vehicles and component

- [No. 103\-25\-2](/bulletins/11037837.md), 2026-10-02, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Technical Information for Need to Replace Components of the High\-Voltage Battery \- High\-Voltage Battery Control Unit / Cell module; No Mixed Installation Permitted: Observe Specified Approach
- [No. 28\-26](/bulletins/11037816.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils. Note that this bulletin covers all models back to model year 1984, for which C40 engine oils are allocated.
- [No. 27\-26](/bulletins/11037813.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils. Note that the bulletin covers all models back to model year 1984, for which C20 engine oils are allocated.
- [No. 26\-26](/bulletins/11037812.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils. Note that the bulletin includes all models back to model year 1984, for which C30 engine oils are allocated.
- [No. 25\-26](/bulletins/11037808.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche A40 Engine Oils. Note that this bulletin covers all vehicles from model year 1997 to 2020, for which A40 engine oils are assigned. Model years 1997\-2001 are not available for selection in the system.
- [GR13D802](/bulletins/11037070.md), 2026-09-04, Service bulletin: ENGINE; POWER TRAIN. Parts Information for Parts Withdrawal \- Coolant Regulator Housing
- [No. 2304\-2](/bulletins/11037057.md), 2026-09-04, Service bulletin: ENGINE; POWER TRAIN. Information on Advanced Technical Information for E3.I/G2 V8 – Oil/Air Separator Membrane Failure
- [No. 50\-26\-2](/bulletins/11036997.md), 2026-09-04, Warranty extension: POWER TRAIN; ENGINE. Update to Warranty Information: Warranty Extension for Additional Coolant Pump
- [51/26](/bulletins/11035934.md), 2026-08-06, Service bulletin: POWER TRAIN. Shrill Humming/Clacking Noise from the Engine Compartment: Check Mounting/Fastening of the ATF Cooler and/or ATF Lines \(SY 51/26\)
- [18/26](/bulletins/11035922.md), 2026-08-06, Warranty extension: POWER TRAIN. Warranty Information: Warranty Extension for Transmission Electronics Control Unit \(18/26\)

JSON: [/v1/bulletins/10128653](/v1/bulletins/10128653)

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