# Service bulletin 51/26

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: 11035934
- Published by NHTSA: 2026\-08\-06
- Manufacturer's number: 51/26
- Manufacturer's date: 2026\-07\-30
- NHTSA component: POWER TRAIN
- Manufacturer's system: ATF Cooler

## NHTSA's summary

Shrill Humming/Clacking Noise from the Engine Compartment: Check Mounting/Fastening of the ATF Cooler and/or ATF Lines \(SY 51/26\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035934-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035934-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2017 to 2026 PORSCHE PANAMERA
- 2017 to 2024 PORSCHE PANAMERA 4
- 2026 PORSCHE PANAMERA 4
- 2017 to 2026 PORSCHE PANAMERA 4 E\-HYBRID
- 2018 to 2024 PORSCHE PANAMERA 4 EXECUTIVE
- 2018 PORSCHE PANAMERA 4 HYBRID
- 2018 PORSCHE PANAMERA 4 HYBRID EXECUTI
- 2018 PORSCHE PANAMERA 4 HYBRID SPORT T
- 2018 to 2020 PORSCHE PANAMERA 4 SPORT TURISMO
- 2017 to 2024 PORSCHE PANAMERA 4S
- 2019 to 2023 PORSCHE PANAMERA 4S E\-HYBRID
- 2025 to 2026 PORSCHE PANAMERA 4S E\-HYBRID
- 2017 to 2024 PORSCHE PANAMERA 4S EXECUTIVE
- 2017 to 2024 PORSCHE PANAMERA 4S SPORT TURISMO
- 2022 to 2024 PORSCHE PANAMERA E\-HYBRID
- 2019 to 2021 PORSCHE PANAMERA GTS
- 2023 to 2026 PORSCHE PANAMERA GTS
- 2019 to 2020 PORSCHE PANAMERA GTS SPORT TURISM
- 2017 to 2020 PORSCHE PANAMERA TURBO
- 2025 to 2026 PORSCHE PANAMERA TURBO E\-HYBRID
- 2017 to 2020 PORSCHE PANAMERA TURBO EXECUTIVE
- 2021 PORSCHE PANAMERA TURBO S
- 2017 to 2023 PORSCHE PANAMERA TURBO S E\-HYBRID
- 2025 to 2026 PORSCHE PANAMERA TURBO S E\-HYBRID
- 2021 PORSCHE PANAMERA TURBO S EXECUTIV
- 2018 PORSCHE PANAMERA TURBO S HYBRID
- 2018 PORSCHE PANAMERA TURBO S HYBRID E
- 2018 PORSCHE PANAMERA TURBO S HYBRID S
- 2018 to 2020 PORSCHE PANAMERA TURBO SPORT TURI

## 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. 31\-26](/bulletins/11037825.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils
- [No. 30\-26](/bulletins/11037822.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils
- [No. 29\-26](/bulletins/11037818.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils
- [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.
- [No. 36\-26](/bulletins/11037801.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils
- [No. 62\-26](/bulletins/11037794.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Technical Information for Coolant Warning Light Lights Up: Suspected Coolant Loss on the Coolant Pump

JSON: [/v1/bulletins/11035934](/v1/bulletins/11035934)

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