Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 15, 2008.
As of Wednesday, October 23rd, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
Aero-Nox2008 and older model year diesel powered vehicles.None

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-631
  • Executive Order 631 / D631
  • ARB # D-631
  • Executive Order No: D-631
  • C.A.R.B. No. D-631
  • Resolution D-631
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-631 PDF

D-631 Document:

                                            State of Califorrlia
                                        AIR RESOURCES BOARD

                                      EXECUTIVE ORDER D-631
                              Relating to Exemptions Under Section 271 56
                                           Of the vehicle Code

                                          AREO-NOX USA, LLC

     WHEREAS, Vehicle Code Sections 27156 and 38391, and Section 2222(e), Title 13,
     California Code of Regulations, authorize the California Air Resources Board and its
     Executive Officer to exempt add-on and modified aftermarket devices from the prohibitions of
     Vehicle Code Section 27156.

     WHEREAS, Aero-Nox USA, LLC of 898 Appian Way, Fairfield, California 94534, has applied
     to the Air Resources Board for exemption from the prohibitions in Vehicle Code Sections
     27156 and 38391 for Ecotech Environmental Technologies, Inc.'s Aero-Nox electronic

     WHEREAS, pursuant to the authority vested in the Executive Officer by Health and Safety
     Code Section 39515 and in the Chief, Mobile Source Operations Division by Health and
     Safety Code Section 39516 and Executive Order G-02-003, the Air Resources Board finds

     1.     The Aero-Nox consists of two components, the reactor installed in the engine
            corrlpartment and electrically connected to the vehicle's 12-volt battery, and the
            reactor ring, wliich is installed inline of the air intake pipe near the intake manifold and
            electrically connected to the reactor.

     2.     The air intake pipe is part of the required motor vehicle pollution control system.

     3.     -The Aero-Nox is intended for use with a required pollution control system of any
            vehicle powered by an internal combustion engine.

     4.     The Aero-Nox by being installed in the air intake pipe constitutes a modification of the
            original configuration of the air intake system.

     5.     The Aero-Nox is a device subject to the prohibitions of Vehicle Code Section 27156
            and an add-on part as defined by Title 13, CCR Section 1900 (b)(l ).

     6.     The Aero-Nox does not reduce the effectiveness of any required motor vehicle
            pollution control system.

     7.     The Air Resources Board, in exercise of technical judgement, is aware of no basis on
            which the Aero-Nox will provide either a reduction in emissions or an improvement in
            fuel economy.

8.        The Air Resources Board cannot determine if the installation of Aero-Nox may cause the
          vehicle manufacturer to void the new vehicle warranty.

9.    The Aero-Nox is not a certified motor vehicle pollution control device pursuant to Health
      and Safety Code Section 43644.

10.   The Air Resol-~rcesBoard by granting an exemption to Aero-Nox USA, LLC for the Aero-
      Nox does not recommend or endorse in any way the Aero-Nox for emissions reduction,
      fuel economy, or any other purpose.

IT IS HEREBY RESOLVED that the Aero-Nox is exempt from the prohibitions of Vehicle Code
Section 27156 for installation on 2008 and older model-year diesel vehicles subject to the
following conditions:

1..   No changes are permitted to the Aero-Nox device as described in the application for
      exemption. Any changes to the Aero-Nox or any of its component, or other factors
      addressed in this order must be evaluated and approved by the Air Resources Board
      prior to marketing in California.

2.    Marketing of the Aero-Nox without a permanent label showing the Executive Order
      number or marketing of the Aero-Nox for an application other than the one stated in this
      Executive Order shall be prohibited unless prior approval is obtained from the Air
      Resources Board. Exemption of this product shall not be construed as an exemption to
      sell, offer for sale, or advertise any components of the Aero-Nox as an individual device.

3.    Any oral or written references to this Executive Order or its content by Aero-Nox USA,
      LLC, its principals, agents, employees, distributors, dealers, or other representatives
      must include the disclaimer that the Executive Order or the exemption it provides is not
      an endorsement or approval of any emissions reduction claims for the Aero-Nox and is
      only a finding that the Aero-Nox is exempt from the prohibitions of Vehicle Code Section
      27 156.

4.    This exemption shall not apply to any device, apparatus, or mechanism advertised,
      offered for sale, sold with, or installed on a motor vehicle prior to or concurrent with
      transfer to an ultimate purchaser.

5.    No claim of any kind, such as "Approved by the Air Resources Board" may be made with
      respect to this Executive Order in any advertising or other oral or written communication.


                         AERO-NOX USA, LLC - AERO-NOX - D-631

Violation of any of ,the above conditions shall be grounds for revocation of this order. The order
may be revoked only after ten day written notice of intention to revoke it, during which period the
holder of the order may request in writing a hearing to contest the proposed revocation. If a
hearing is requested, it shall be held within ten days of receipt of the request, and the order may
not be revoked until a recommendation is made, after the hearing, that grounds for revocation

Executed at El Monte, California, this   /5 day of February 2008.


                                   Annette Hebert, Chief
                                   Mobile Source Operations Division

                          AERO-NOX USA, LLC - AERO-NOX - D-631

Document Created: 2008-02-21 15:19:50
Document Modified: 2008-02-21 15:19:50

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