On March 30, 2026, Region 10 filed an Expedited Settlement Agreement with Northwest Autohaus for violations of Title II of the Clean Air Act. Between January 1st, 2024, and October 15th, 2025, Northwest Autohaus removed or rendered inoperative emissions-related device or element of design installed on or in a motor vehicle or motor vehicle engine. Additionally, respondent installed aftermarket defeat devices that bypass or remove emissions-related controls in a motor vehicle. This is the first enforcement action EPA has taken against Northwest Autohaus for tampering with the emission control units and installing aftermarket defeat devices rendering those units inoperable. Northwest Autohaus will pay a civil penalty of $31,328.30.