2017 ORS 815.250¹
Operation without proper exhaust system
  • exemptions
  • penalty

(1) A person commits the offense of operation without proper exhaust system if the person drives or moves on any highway or owns and causes or knowingly permits to be driven or moved on any highway a motor vehicle that is not equipped with an exhaust system that meets the requirements under this section.

(2) An exhaust system only meets the requirements of this section if all of the following apply:

(a) The exhaust system must be in good working order.

(b) The exhaust system must be in constant operation.

(c) The exhaust system must meet noise emission standards determined by the Department of Environmental Quality to be substantially equivalent to the following standards based upon a stationary test conducted at a distance of 25 feet in accordance with procedures established by the Department of Environmental Quality:



level, Model,

Vehicle type dBA Year

I. Motor vehicles

required to

establish a


weight under

ORS 803.430 (Certain vehicles required to establish registration weight for fee determination)

and commercial

buses 94 before


91 1976 and


II. Motorcycles and

mopeds 94 before


91 1976

89 after 1976

III. Motor vehicles

not described

under I or II 92 before


88 1976 and



(3) This section does not apply to the following vehicles:

(a) Vehicles of special interest that are registered under ORS 805.020 (Special interest vehicles) and that are:

(A) Equipped with original manufacturer’s equipment and accessories, or their equivalent, and that are maintained in safe operating condition; or

(B) Street rods that conform to ORS 815.107 (Exemption from equipment requirements for street rods).

(b) Road machinery, road rollers or farm tractors.

(c) Antique vehicles that are maintained as collectors’ items and used for exhibitions, parades, club activities and similar uses, but not used primarily for the transportation of persons or property.

(4) The court in its discretion may dismiss a citation issued for violation of the offense described in this section if evidence is presented that the exhaust system complies with or has been repaired or modified to comply with the requirements under this section.

(5) The offense described in this section, operation without proper exhaust system, is a Class C traffic violation. [1983 c.338 §496; 1985 c.16 §257; 1985 c.393 §23; 1997 c.402 §15; 2015 c.138 §34]

1 Legislative Counsel Committee, CHAPTER 815—Vehicle Equipment Generally, https://­www.­oregonlegislature.­gov/­bills_laws/­ors/­ors815.­html (2017) (last ac­cessed Mar. 30, 2018).
2 OregonLaws.org contains the con­tents of Volume 21 of the ORS, inserted along­side the per­tin­ent statutes. See the preface to the ORS An­no­ta­tions for more information.
3 OregonLaws.org assembles these lists by analyzing references between Sections. Each listed item refers back to the current Section in its own text. The result reveals relationships in the code that may not have otherwise been apparent.