Approval Details

Valid E.O.


This Executive Order approved the specified parts on on June 26, 2007.
As of Sunday, April 14th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
OPS-12007 and older model year heavy-duty diesel engines with presurized oil systemsNone

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-621
  • Executive Order 621 / D621
  • ARB # D-621
  • Executive Order No: D-621
  • C.A.R.B. No. D-621
  • Resolution D-621
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-621 PDF

D-621 Document:

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