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Service bulletin No. 71-20

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10199873
Published by NHTSA2021-08-04
Manufacturer's numberNo. 71-20
Manufacturer's date2021-07-30
NHTSA componentTIRES; WHEELS

NHTSA's summary

List of approved wheels and tires for the 959.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Tires, Wheels

Vehicles listed
PORSCHE PORSCHE

Listing a model year does not mean every vehicle of it is concerned: the document says which.