SAE J129-1981
Engine and Transmission Identification Numbers

Standard No.

SAE J129-1981

Release Date

1981

Published By

Society of Automotive Engineers (SAE)

Status

Be replaced 2010-08

Replace By

SAE J129-2010

Latest

SAE J129-2024

Scope

This SAE Recommended Practice has been established to provide direction for the design and installation of an identification number as assigned to passenger car and truck engines and transmissions. In adhering to these recommended practices, facility of application in factory production and appearance are matters for manufacturer control. Reference SAE J853.

SAE J129-1981 history

• 2024 SAE J129-2024 Engine and Transmission Identification Numbers
• 2010 SAE J129-2010 Engine and Transmission Identification Numbers
• 1981 SAE J129-1981 Engine and Transmission Identification Numbers
• 1969 SAE J129-1969 PASSENGER CAR VEHICLE ENGINE AND TRANSMISSION IDENTIFICATION NUMBERS