# ISO 3173:1974 — Withdrawn and superseded ISO standards

For ISO 3173:1974, item title is Road vehicles — Apparatus for measurement of the opacity of exhaust gas from diesel engines operating under steady state conditions; status code is 9599; successor is ISO 11614:1999; withdrawn / published date is 1974-12-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3173:1974 _(verified: appears in the quote below)_
- **Item title:** Road vehicles — Apparatus for measurement of the opacity of exhaust gas from diesel engines operating under steady state conditions _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11614:1999
- **Withdrawn / published date:** 1974-12-01 _(verified: appears in the quote below)_

## What the source says

> 8359,IS,,ISO 3173:1974,Road vehicles — Apparatus for measurement of the opacity of exhaust gas from diesel engines operating under steady state conditions,Véhicules routiers — Dispositif pour le mesurage de l'opacité des gaz d'échappement des moteurs diesel fonctionnant en régime stabilisé,1974-12-01,1,"['13.040.50','43.180']",ISO/TC 22,9599,,[19551],"['en','fr']",26,

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).