Approval Details

Valid E.O.


This Executive Order approved the specified parts on on January 19, 2011.
As of Sunday, July 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1992-2006 on-road diesel engines with displacements from 5.9 to 13 liters and horsepower ratings from 150 to 500The engines must be certified to 0.10 g/bhp-hr or lower particulate matter standard. The exemption excludes engines originally certified with a diesel particulate filter.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-684
  • Executive Order 684 / D684
  • ARB # D-684
  • Executive Order No: D-684
  • C.A.R.B. No. D-684
  • Resolution D-684
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-684 PDF

D-684 Document:

Current View

| Previous E.O. D-683 | Next E.O. D-684-1 | Next E.O. D-685