State ex rel. Yost v. Volkswagen Aktiengesellschaf
Annotate this Case
The Supreme Court affirmed the judgment of the court of appeals concluding that the federal Clean Air Act, 42 U.S.C. 7401 et seq., did not preempt the State's in-use motor vehicle emission control system tampering claims against Volkswagen, holding that the Clean Air Act did not preempt Ohio law and preclude an anti-tampering claim under Ohio's Air Pollution Control Act, Ohio Rev. Code 3704.01 et seq.
After the United States Environmental Protection Agency discovered Volkswagen's scheme to enable its vehicles to perform better than they otherwise would have on federal emissions tests, the State of Ohio sued Volkswagen for its vehicle-emissions tampering, alleging that Volkswagen's conduct violated Ohio's Air Pollution Control Act. The trial court granted Volkswagen's motion to dismiss, concluding that Ohio's anti-tampering statute was preempted by the federal Clean Air Act. The court of appeals reversed. The Supreme Court affirmed, holding that the federal Clean Air Act neither expressly nor impliedly preempts section 3704.16(C)(3) or precludes an anti-tampering claim under the state Air Pollution Control Act for a manufacturer's post-sale tampering with a vehicle's emissions-control system.
Some case metadata and case summaries were written with the help of AI, which can produce inaccuracies. You should read the full case before relying on it for legal research purposes.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.