Arizona Revised Statutes

Ariz. Rev. Stat. § 28-958.01 (2026)

Rear fender splash guards

✓ current as of May 2026
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A. A person shall not operate a truck, trailer, semitrailer or bus on a highway unless the vehicle is equipped with rear fender splash guards that comply with the specifications provided in this section.

B. The splash guards:

1. Shall be attached in a manner that prevents the splashing of mud or water on the windshield of other motor vehicles.

2. Shall extend to a length of not more than eight inches from the ground.

3. Shall be wide enough to cover the full tread or treads of the tires being protected.

4. Shall be installed close enough to the tread surface of the tire or wheel to control the side throw of the bulk of the thrown road surface material.

5. May be constructed of a flexible rubberized material.

6. Shall be attached in a manner that, regardless of movement either in the splash guards or the vehicle, the splash guards retain their general parallel relationship to the tread surface of the tire or wheel under all ordinary operating conditions.

C. This section does not apply to:

1. A vehicle commonly known as a pickup truck with a manufacturer's gross vehicle weight rating of ten thousand pounds or less, except that this section applies if the pickup truck has been modified from the original bumper height design to raise the center of gravity of the pickup truck.

2. A truck tractor or converter dolly when used in combination with another vehicle.

3. A single, tandem or triple axle trailer with fenders that are wide enough to cover the full tread or treads of the tires being protected and that extend to a length of not more than fourteen inches from the ground.

 

Notes of Decisions
Cited in 3 cases (1 in the last 5 years), 2016–2022 · leading case: State of Arizona v. Kyle Andrew Stoll, 370 P.3d 1130 (Ariz. Ct. App. 2016).
State of Arizona v. Kyle Andrew Stoll, 370 P.3d 1130 (Ariz. Ct. App. 2016). · cites it 3× “Second, the SUV had slightly oversized after-market rear tires, but no mud flaps; at the time of the stop the deputies believed this was a violation of A.R.S. § 28-958.01. However, at the suppression hearing, both deputies conceded there was in fact no mud flap violation because…”
State v. Douglas (Ariz. Ct. App. 2022). · cites it 5× “¶3 The Trooper testified that he was patrolling traffic on April 30, 2019, when he followed and stopped a "lifted" pickup truck—one with a raised center of gravity—for traveling without rear fender splash guards ("mud flaps"), in violation of A.R.S. § 28-958.01. At the stop, he…”
State v. Farid (Ariz. Ct. App. 2020). · cites it 2× “See A.R.S. § 28-958.01. When Farid could not provide his registration or insurance, Dickinson asked him to exit the truck and walk back to the patrol vehicle.”
— Ariz. Rev. Stat. § 28-958.01(A) — 1 case
State v. Douglas (Ariz. Ct. App. 2022). “¶3 The Trooper testified that he was patrolling traffic on April 30, 2019, when he followed and stopped a "lifted" pickup truck—one with a raised center of gravity—for traveling without rear fender splash guards ("mud flaps"), in violation of A.R.S. § 28-958.01. At the stop, he…”
— Ariz. Rev. Stat. § 28-958.01(C)(1) — 1 case
State of Arizona v. Kyle Andrew Stoll, 370 P.3d 1130 (Ariz. Ct. App. 2016). “Second, the SUV had slightly oversized after-market rear tires, but no mud flaps; at the time of the stop the deputies believed this was a violation of A.R.S. § 28-958.01. However, at the suppression hearing, both deputies conceded there was in fact no mud flap violation because…”
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