# Service bulletin No. 166\-21\-1

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: 10249920
- Published by NHTSA: 2024\-02\-08
- Manufacturer's number: No. 166\-21\-1
- Manufacturer's date: 2024\-01\-30
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PIPES, HOSES, AND FITTINGS; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT; ENGINE AND ENGINE COOLING

## NHTSA's summary

Technical information for Oil Leakage on Cylinder Head Cover: Insert Micro\-Self\-Locking Screw

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249920-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249920-9999.pdf)

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

## Components

Engine, Equipment and accessories, Labels and manuals, Engine oil and lubrication

## Vehicles listed

- 2019 to 2023 PORSCHE CAYENNE
- 2019 to 2023 PORSCHE CAYENNE E\-HYBRID
- 2020 to 2022 PORSCHE CAYENNE GT
- 2021 to 2023 PORSCHE CAYENNE GTS
- 2019 to 2023 PORSCHE CAYENNE S
- 2020 PORSCHE CAYENNE S E\-HYBRID
- 2019 to 2020 PORSCHE CAYENNE TURBO
- 2023 PORSCHE CAYENNE TURBO
- 2020 PORSCHE CAYENNE TURBO COUPE
- 2022 to 2023 PORSCHE CAYENNE TURBO GT
- 2019 to 2023 PORSCHE CAYENNE TURBO S E\-HYBRID
- 2020 PORSCHE CAYENNE TURBO S HYB COUPE
- 2020 PORSCHE redundant CAYENNE E\-HYBRID

## Other bulletins for the same vehicles and component

- [No. 22\-23](/bulletins/10243591.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
- [No. 21\-23](/bulletins/10243590.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
- [No. 20\-23](/bulletins/10243589.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
- [No. 19\-23](/bulletins/10243588.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche A40 engine oils.
- [No. 18\-23](/bulletins/10243587.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
- [No. 17\-23](/bulletins/10243586.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
- [No. 16\-23](/bulletins/10243585.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
- [No. D647](/bulletins/10242132.md), 2023-09-09, Service bulletin: UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PUMP. Parts information on parts withdrawal for the oil pump
- [No. 12\-22](/bulletins/10222554.md), 2022-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Instructions on manufacturers certificate for allocation of approved engine oils.
- [No. 31\-20](/bulletins/10180557.md), 2020-10-01, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. List of approved engine oils for all Porsche models since 2003.

JSON: [/v1/bulletins/10249920](/v1/bulletins/10249920)

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