# Service bulletin No. 91\-21

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: 10203066
- Published by NHTSA: 2021\-11\-05
- Manufacturer's number: No. 91\-21
- Manufacturer's date: 2021\-10\-15
- NHTSA component: WHEELS; TIRES

## NHTSA's summary

Instructions on the manufacturer's certificate for approved summer tires and wheels.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203066-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203066-9999.pdf)

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

## Components

Tires, Wheels

## Vehicles listed

- 2004 to 2005 PORSCHE CARRERA GT
- 2006 PORSCHE CARRERRA GT

JSON: [/v1/bulletins/10203066](/v1/bulletins/10203066)

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