Approval Details

Valid E.O.


This Executive Order approved the specified parts on on September 1, 1998.
As of Friday, September 25th, 2020 this Executive Order has not been overturned or superceeded.

Approved Parts

1998 and older diesel powered vehiclesUses coolant temperature to heat incoming fuel

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-253-4
  • Executive Order 253-4 / D253-4
  • ARB # D-253-4
  • Executive Order No: D-253-4
  • C.A.R.B. No. D-253-4
  • Resolution D-253-4
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-253-4 PDF

D-253-4 Document:

Current View

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