EPA v. STM TUNING (ESA) (CAA MOBILE)
Final Order With Penalty
Case summary
On March 16, 2025, Region 10 filed an Expedited Settlement Agreement with STM Tuning for violations of Title II of the Clean Air Act. Between January 1st, 2024 and October 15th, 2025, STM Tuning removed or rendered inoperative emissions-related device or element of design installed on or in a motor vehicle or motor vehicle engine. This is the first enforcement action EPA has taken against STM Tuning for tampering with emission control units and rendering them inoperable. STM Tuning will pay a civil penalty of $13,004.20.
Defendants (1)
- STM TUNINGNamed in complaintNamed in settlement
Facilities (1)
STM TUNING
4715 EAST TRENT AVENUE, SPOKANE, WA, 99212
Registry ID: 110072101956
Statutes cited
- CAA 203 — Prohibited Acts - Motor Vehicle & Motor Vehicle Engines
- CAA 208 — Information Collection from Motor Vehicle Mfg.
Enforcement conclusions (1)
STM TUNING (ESA) (CAA MOBILE)entered 2026-03-16
Primary law: CAA
Federal penalty: $13,004
Timeline (4 milestones)
- 2025-12-22Enforcement Action Data Entered
- 2026-03-16Complaint Filed/Proposed Order
- 2026-03-16Final Order Issued
- 2026-03-30Enforcement Action Closed
Case metadata
- EPA activity ID
- 3604671403
- Case number
- 10-2026-0052
- Lead agency
- EPA
- EPA region
- 10
- Voluntary self-disclosure
- No
- Primary statute
- Prohibited Acts - Motor Vehicle & Motor Vehicle Engines
Sourced verbatim from EPA ECHO Enforcement Case Report for case 10-2026-0052 . Bulk data: ICIS-FEC download summary.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.